Ac Compressor Not Working Troubleshooting







A Coleman air conditioner not only cools, dehumidifies and filters the air in an RV, it can also work as a heater with the addition of a heat strip. Given the age of the car and not knowing whether the compressor has been replaced before, the part most likely to have failed is. It is a Carrier unit and the trailer a 44 foot Breckenridge and still fairly new. Scenario B: Both compressor and fan are not working. It's alarming to see water dripping off your window unit air conditioner or to find a puddle growing beneath it. Troubleshooting Steps. Category Howto & Style; Show more Show less. Air conditioning System performance test; at work photo Gallery; Auto A/C compressors. This part is commonly used in window air conditioner units to help control the various parts. While many air conditioning repairs require a professional, homeowners can learn how to troubleshoot and fix some common home A/C problems themselves. Average repair cost is $980 at 89,100 miles. At the beginning of this year the AC compressor stopped working on my 2004 Sienna LE. 5 Common Reasons Why Your Central Air Conditioner Fan Is Not Working. Any experts out there that can help ?. When I turn on the AUTO button, the display says FULL AUTO and the temp I set it to, however I do not hear or feel a compressor kick on and I do not feel air blowing from the front. I bought a brand new (NOT remanufactured) AC-Delco compressor from Rockauto for just under $300. DISCHARGE GAS IN NEW COMPRESSOR FROM CHARGING VALVE BEFORE INSTALLING IT If the gas in the new compressor is not discharged first, compressor oil will spray out with gas when the plug is removed. The unit inside the house is running, as well as the condenser fan, but the compressor is quiet as a mouse. If not, try an independent, the sort who comes out to your house. Hi all, Just working out why my AC unit isnt working, I very rarely use the AC but do turn it on every now and then to keep things circulating around, when I bought the car about a year ago the aircon was ice cold. The center part on the pulley of the A/C compressor will not spin when you have the air conditioner off or if there is a problem. Some of the most common reasons AC compressors stop working include: Dirty. I've ignored it for a couple of years since I haven't needed AC, but I'm heading across the midwest next week so I'm considering fixing it. Why You Might Need AC Compressor Troubleshooting Tips. Howdy Carlos, Yes, I think your two problems are related. Your air conditioner's compressor is responsible for making sure the refrigerant is at optimal pressure, making it one of the most important parts of your unit. on the high side. Check the expansion valve for blockage and function. the green one on top of the air cleaner and the one on the accumalator. If the air conditioner/heat pump doesn't run (the fan and/or the compressor), check the AC voltage. Category Howto & Style; Show more Show less. Scenario B: Both compressor and fan are not working. The big refrigerant line is not cold. HVAC Troubleshooting: How to Fix An HVAC Compressor That Won't Turn On. If you followed the step above and checked if the compressor was grounded and it checks out good, then here we will check the compressor. i have a 2001 alero, AC stopped working, it blows air out, just not cool, usually warm. Have you noticed it blowing warmer air than usual, up until it stopped working? That would be an indicator your freon is low and you have a leak. Before you call the AC repair service, use these AC troubleshooting tips that address common problems, their causes and cures. Also please check out the statistics and reliability analysis of Chevrolet Cruze based on all problems reported for the Cruze. Operation of the system is as follows (assume that the car is not near WOT): If the fan is on, adequate pressure is present in the system (pressure cycling switch is closed), and either a/c or defrost is selected, the point "to ecm" is drawn close to ground. If doing a home AC compressor replacement yourself, you can expect to pay anywhere from $300 to $600 for a compressor that fits your air conditioner. You can drive with blown AC as long as your drive belts to AC unit are moving without restriction. Some of the most common reasons AC compressors stop working include: Dirty. Five Reasons an Air Conditioner Compressor Will Not Start. Background. Not Cooling - Room Air Conditioner. Tighten valve 2. Here's how it starts: you notice it's too hot in your space and the AC is not achieving the set temperature. Any experts out there that can help ?. All fuses seem OK. Again, most common reason for an A/C compressor not engaging is a lack of refrigerant (check that first). With summer just around the corner, the last thing you want to deal with is a broken air conditioning system. Our Refrigerator Repair Services including refrigerator repair, ice maker repair, freezer repair, dishwasher repair, washer and dryer repair, air conditioning repair and heating repair. The Compressor is not Always the Problem The fact that a 2003 Volkswagen Jetta AC compressor is not working does not necessarily mean that the compressor is the problem. They did all the hoses and then the compressor before it would hold. Category Howto & Style; Show more Show less. – The A/C light comes on in the van. I have 2004 EX with almost 70K. Escort/ZX2 AC problems? Read this Escort Car Forums 98 ford escort , ac does not work. When I press the AC button on the dash, the green light comes on, and the blower motor is blowing air, but air is not cold. In case you have landed on this page first, page one is right here. Adjusting the thermostat does not change the occurrence. Out on the road, the A/C cuts out. Fan not working Blockage in system( or clogged cabin filter, evaporator or condenser) Seized compressor pulley bearing (but the pulley would not be turning) (There are other causes for A/C to not work including too much refrigerant or too much oil--but since yours had been working, these are unlikely). Not every AC repair problem is a costly one to fix. I have a problem with my air conditioning in my 2007 OBW. will this work? or are defrosters and compressors not meant to overlap in operation?thanks I may be 100% wrong, but I would think that you want to run the defroster when the compressor is off and not all the time it is off, just long enough often enough to defrost as needed. However, your capacitor can go bad for various reasons and stop working properly, which will force one of your system's fans to stop spinning. Noises from the engine compartment. It will be OK but minus air conditioning. Other signs of a leak are. So, when you hear a strange sound or notice the air is not as cool as it normally is, are there things a homeowner can do themselves with central air conditioning repair and troubleshooting? The Major Parts Of Air Conditioner Units. Bad Central AC Compressor; AC Unit Freezing Up; AC Wiring; Air Conditioner Fan Problems; AC Fan Motor Not Working; Air Handler Problems; Inadequate AC Maintenance; Uneven Air Flow Cooling; Thermostat Temperature Sensor Problems; Failing Air Conditioner Capacitor; Dirty Air Filters; AC Blowing Warm Air; Low AC Refrigerant. If both blower motors work on low speed the motors. The AC clutch relay is controlled by the PCM (so if you step on the gas, the AC turns off giving you more power to the wheels) The Insturtment cluster sends a request to the EMTC (electric Manual Temperature control) and I believe the EMTC sends the signal to the PCM, most of these signals are Can Bus and not hard wires. on the low side and 150 lbs. Portable AC Troubleshooting Tips. I have a 2005 Holiday Rambler Navigator with a Roadmaster chassis. It would not engage, the clutch would not kick in (compressor not spinning), and obviously I would not get any cool air. David discusses ac compressor troubleshooting. Causes seem to vary, "While there are a variety of reasons your Nissan Rogue air conditioning won't work, the most common 3 are a refrigerant leak, an electrical climate control issue, or a problem with the air conditioning compressor. Here are a few ways to diagnose a car AC compressor failure. Compressor reed valves 5. Here's how: Chose a symptom that describes the problem, and then read through the possible causes. If the air conditioner/heat pump doesn't run (the fan and/or the compressor), check the AC voltage. Plus they should replace total system so no worry. i tried using a jumper wire to the switch on accumalator. Hex Auto Parts Common AC Compressor Problems Cool But Not Cold If the air conditioning is set to max cool and fans on high, but is only blowing moderately cool air: 1. An automobile can have numerous serious problems and a dysfunctional AC compressor clutch is one of them. Troubleshooting Index Page. It's July, and a skipper's thoughts turn to his air-conditioning system—especially if the darn thing stops working and his family moves into the Holiday Inn next door to the marina. Typically, central air conditioners run through the home’s forced-air distribution system. The unit inside the house is running, as well as the condenser fan, but the compressor is quiet as a mouse. If the fridge compressor is running but not cooling the problem is likely the evaporator coils, evaporator fan or condenser fan need to be repaired or replaced. Not every AC repair problem is a costly one to fix. Replace reed valves 5. Re: 1992 AC Problems-Blinking A/C and not working. searay 250 da ac not working I have a 89 searay 250DA. Hi, I'm hoping someone can help as I'm at a bit of a loss. But most of the time was not working at all, just hot air. So I bought my truck about a year ago and the air conditioner did not work so i took it back and they replaced the compressor and it worked! Now that it is summer I turned on the AC and I am getting a flashing orange light and it is not producing any cold air. How to Easily Tell If Your Home AC Compressor Is Bad. Common Problems: Leaks in one or more seals or the compressor itself can occur. The evaporator may not be accessible, but if it is, you should clean it once a year. This the easiest one to diagnose. The 2 most common types of compressor problems are burned out motors and hard starting motors. When central air conditioning service fails during a heat spell, you may have to wait days for an HVAC repair technician or an ac contractor to show up, and you'll probably pay at least several hundred for the repair. The AC stopped working on my mother-in-law's 2002 Town and Country 3. and seals for R 1 34a air conditioning systems. The air was not really cold, about 70 degrees at the vent. We took it to the local Chevy Dealer for the recall and had them evaluate the air conditioning. Covers AC that isn't working at all, isn't cooling properly, isn't blowing air, is leaking, and similar AC problems. If it is not functioning, then the system can not operate, and will be unable to produce cold air. These fins work like the radiator on a vehicle, and. Worse yet, if hose in GMC, Chevy and Cadillac trucks cracks and is not able to transport Freon from the compressor to the condenser, both the condenser and compressor may break, too. 00 later I was happy with my AC working and cooling fine, but. Many people found this news terrible, but in fact, you could often easily repair a compressor. This reason is rather conspicuous. If you observe the AC condenser fan not spinning on your outdoor air conditioning unit, the problem is likely one of a few common things. 2) If your low on freon, the AC will not engage. Here we give a sequence of things to check if the A/C is just not working. A capacitor stores up energy that provides power to your air conditioner’s fans. Air conditioning repair always near me fl. Covers AC that isn't working at all, isn't cooling properly, isn't blowing air, is leaking, and similar AC problems. I need some help. Faulty A/C compressor or clutch, repair as necessary. Most modern compressors have a clutch and drive pulley. Operation of the system is as follows (assume that the car is not near WOT): If the fan is on, adequate pressure is present in the system (pressure cycling switch is closed), and either a/c or defrost is selected, the point "to ecm" is drawn close to ground. Part of the expense goes to properly handling the refrigerant used in an air conditioning system, which is toxic to inhale. Some of the most common reasons AC compressors stop working include: Dirty. Carrier Roof Air Conditioner Not Working Question: My AC RV roof top unit is not working. When temperatures soar and your air conditioning unit is not cooling in the summer heat, you need a quick solution. I am sure he does not want to cut anything just yet and its been working fine for a week or so. LG Floor Standing Air Conditioner Troubleshooting Only advanced technologies are used in different types of LG air conditioners: from modern inverter compressors and powerful air cleaning and ionization systems to the most advanced LG air conditioner troubleshooting system. Step 1: If the air temperature does not cool when the AC system has engaged there is a good chance that there was an AC compressor failure. I jumped the compressor to the battery, engaged the compressor, and the low went to 30 and high went to 150. Look there are only a few reasons that your air conditioner won't turn on. Hey,,, it was dark Replaced sensor, freon,, and yes the bad alternator, however the air conditioning still does not work. When the RV air conditioner compressor not coming on, follow this troubleshooting process. The car is a 2006 Jetta with 200,000 miles. Test the. If it does while its not working normally then something is commanding the AC not to turn on whether it be pressure switch, sun load, colant temp sen, or thermal switch. If your air conditioner is on, be sure to close your home's windows and outside doors. steveselden. I looked at the compressor clutch with the engine running and the AC on, and it wasn't spinning. Ok, hello all. On/off When “ECO HEAT/COOL”mode is turned on, the switch indicator will come on and the “ECO” indicator will appear. Since I'm constantly receiving questions on 944 air conditioning systems, I figured it's time to come up with come helpful troubleshooting tips. If the existing compressor can't turn then ask the garage if they can fit a secondhand compressor that does turn OK. I need help on my Mercedes W124, I just had an engine swap from the Om603 to the Om606 and after that, the ac compressor is not engaging. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. However, your capacitor can go bad for various reasons and stop working properly, which will force one of your system's fans to stop spinning. Step One: The compressor is the power unit of the A/C system. The 606 came with a compressor without a speed sensor. Air conditioner compressor clutch not engaging. When troubleshooting, make sure mains power is disconnected before proceeding to check the printed circuit board to prevent electric shock. The unit stops working. Hex Auto Parts Common AC Compressor Problems Cool But Not Cold If the air conditioning is set to max cool and fans on high, but is only blowing moderately cool air: 1. Plus, you should. Over time, parts of the air conditioning system may need replacement, cleaning or re-greasing. AC compressor clutch won’t engage – Toyota Fix B1479 Flow sensor and AC compressor clutch won’t engage. On/off When “ECO HEAT/COOL”mode is turned on, the switch indicator will come on and the “ECO” indicator will appear. Air conditioning (often referred to as AC, A/C, or air con) is the process of removing heat and moisture from the interior of an occupied space to improve the comfort of occupants. Worse yet, if hose in GMC, Chevy and Cadillac trucks cracks and is not able to transport Freon from the compressor to the condenser, both the condenser and compressor may break, too. I was not about to disassemble a perfectly working AC system because. A blower becomes a necessary part of the evaporator in the air conditioning system. ok there is no power getting to the compressor. A capacitor stores up energy that provides power to your air conditioner's fans. Left alone it could cause further damage at worst case, a bad compressor. on the low side and 150 lbs. a/c system does not work. Air Conditioning: not working, wher do I start? if the charge is good start the car turn on the ac and if the compressor doesnt kick on, take the cover off of the. A new system should not require a reset to continue cooling. Today, I turned it on and the AC unit was making a loud buzz noise but the fan was not running. Your Goodman central air-conditioning system includes a compressor outdoors and a coil indoors on top of your furnace. Before making any final decisions, you need to perform a little troubleshooting […]. Simply replacing those would have "fixed" the problem, but the root cause was a bad FCM, which also needed to be replaced. Yesterday, one of my outside AC Units (larger) one stopped working. Adjusting the thermostat does not change the occurrence. system has one can of freon. If the AC isn't quite as cool as it used to be, the solution might be as simple as recharging the system. Jones Air Conditioning www. AC not working 5 Answers. 20 hours ago · Choose another country or region to see content specific to your location. Scenario B: Both compressor and fan are not working. Last night the A/C was working fine, this morning would not engage the compressor clutch, the 10amp fuse is ok but replace it anyway with no luck. For the AC to function efficiently, it should have three main parts in perfect working order; the compressor, condenser and evaporator. There are a lot of factors that determine whether your compressor will turn on, including blockages and problems with the thermostat that may prevent the compressor from working properly. 12 problems related to air conditioner have been reported for the 2015 Chevrolet Silverado 1500. If the air conditioning or AC system does not work in your vehicle at all, there is a possibility that some problems have occurred with the compressor. If the thermostat has no lights showing, it means it is not receiving DC power. When the AC compressor clutch in your car suddenly stops working and does not engage, it could be a sign of serious problem as cool air flow would not be blown into the engine. Left alone it could cause further damage at worst case, a bad compressor. Popping the hood with maximum air-conditioning selected often reveals the problem of the car AC clutch not engaging. Geothermal Heating and Cooling Problems Troubleshooting. While many air conditioning repairs require a professional, homeowners can learn how to troubleshoot and fix some common home A/C problems themselves. This weekend it was very hot in CA and so we tried to switch on the AC. In my humble opinion automotive AC is not a do-it-yourself thing. Not every AC repair problem is a costly one to fix. '09 Civic A/C compressor not working was created by matthewross1987 I had a friend hit the A/C button while I looked under the hood and I noticed that the A/C compressor clutch didn't engage. '09 Civic A/C compressor not working was created by matthewross1987 I had a friend hit the A/C button while I looked under the hood and I noticed that the A/C compressor clutch didn't engage. When your system is regularly maintained by a trained AC professional, he will check the lubricant levels and the condition of the oil pump to prevent this problem. If you followed the step above and checked if the compressor was grounded and it checks out good, then here we will check the compressor. If you have a situation where your car's air conditioner compressor clutch doesn't engage, try the troubleshooting techniques described here. If the problem is continuous, take a look at the fuse and the wiring. After some hissing and other noises typical to a compressor starting up, it looks like the compressor disengages after about 30 seconds. Technician A says that the capacitor is good because it is within its normal 20% range. My air conditioner is not working as well as I remember it either. Is your AC not working? If your central air conditioner is not cooling right, repair it with these expert DIY air conditioning repair techniques. Portable AC Troubleshooting Tips. If it is not functioning, then the system can not operate, and will be unable to produce cold air. The walk-in freezer or walk-in cooler is a major part of many convenience stores, cafeterias, and restaurants. The refrigerant charge is too high or too low (will cause the binary pressure switch to open and prevent the compressor from operating). Anyone ever hear of such a thing and what would cause this?. We wanted to give a big of explanation on one in particular: what is happening when the fan is running but the compressor is not? There are a few reasons why this might be happening. The air handler might not be working because of a blown fuse or open circuit breaker. Could I have messed up my VHS by pulling it home?. It is a Carrier unit and the trailer a 44 foot Breckenridge and still fairly new. Fan not working Blockage in system( or clogged cabin filter, evaporator or condenser) Seized compressor pulley bearing (but the pulley would not be turning) (There are other causes for A/C to not work including too much refrigerant or too much oil--but since yours had been working, these are unlikely). If these internal parts were to fail, the compressor would fail because of it, resulting in an air conditioner that either does not work at all or does not produce cold air. Adjusting the thermostat does not change the occurrence. 00 later I was happy with my AC working and cooling fine, but. 19 hours ago · 2010 honda crv air conditioning problems If your air conditioner is blowing warm air, or just not working properly, it's a actually cruel joke. Compressor problems. The compressor is the part of the air condition unit that pressurizes the refrigerant and pumps it through the AC system. AC Fan/Compressor Not Working - How To Test. But first, know some facts about an AC clutch compressor. fuses look good. A sign that the control board is not working is the fan or compressor circuits not turning on. Any suggestion will be appreciate. It also removes heat and moisture from the air inside your home by circulating the warm air over the indoor coil and pumping it to the outside of your home. When I hook up the gauges low was 95 and high was 75. Plus, you should. Not sure what is wrong. my ac compressor is still not engagin. Thanks to this thread I was able to learn about the COMPRESSOR CONTROL VALVE; so I did order it at a place on-line for $75. Five Reasons an Air Conditioner Compressor Will Not Start. It should be obvious to on inspection with hood up and engine running. So, I turned it off. Air Conditioning Troubleshooting. only claim I. the AC system is not plumbed into engine in any way. Portable AC Troubleshooting Tips. Air conditioning does not work. Malfunctioning compressor- The compressor in your air conditioning unit is the part of your cooling system that works to pressurize and cool the refrigerant in the unit. I checked the fuses and the relays and they appear to be OK. A new system should not require a reset to continue cooling. Air Conditioning Troubleshooting Tips for the Mitsubishi 3000GT/Dodge Stealth by Jeff Lucius Introduction If a problem occurs with the air conditioning, there is some simple troubleshooting we as owners can perform to determine the likely cause. While other issues can go wrong, AC compressor problems are quite common. And now the Air Conditioner is not working. Test the defrost timer. Also please check out the statistics and reliability analysis of Chevrolet Cruze based on all problems reported for the Cruze. please help my fuses are good. Common Problems: Leaks in one or more seals or the compressor itself can occur. water pump, master cylinder/brake booster and a steering rack on two of them. Operate the air conditioner, and then turned it off. Troubleshooting Central Air Conditioners - Minor problems with a central air conditioner can be fixed without a professional. If you verify that the thermostat is working correctly, turn it on to cool, and check the voltage reading at the compressor contactor. 5 S) A/C not working. Verify the cooling control signal from the thermostat. I was driving with the air conditioning on and working fine decide to stop at Walmart for 5 min come back to the car starts fine and all of a sudden no more air conditioning. A clamp meter, on the other hand, is a great tool for troubleshooting electrical motor and compressor problems. 2011 Nissan Altima (2. the AC system is not plumbed into engine in any way. It won't accept freon so I think it's either the compressor or the fuse/relay. A/C PRO is the easy DIY car A/C repair that saves time & money. Why Is My AC Compressor Not Working? | Compressor Failure Troubleshooting. When I turned it on I didn't hear the 'click' of the compressor clutch engaging. Have the system evacuated, charged and leak tested by an MVAC certified technician, utilizing approved recovery/recycling equipment. Guide to troubleshooting an air conditioner or heat pump compressor/condenser unit How does an air conditioner compressor and condensing coil work? What is the Compressor unit in an air conditioner or heat pump system? What are the components of the outdoor compressor/fan-coil unit on an air conditioner?. If your air conditioner has a rotary type temperature control or thermostat and does not turn on you may have a defective control. Comp clutch is "free" wheeling. Once you turn on the AC the center part of the compressor, the AC clutch should engage and start to rotate with the pulley. You may also hear noise when starting up the AC. On/off When “ECO HEAT/COOL”mode is turned on, the switch indicator will come on and the “ECO” indicator will appear. Since I'm constantly receiving questions on 944 air conditioning systems, I figured it's time to come up with come helpful troubleshooting tips. Left alone it could cause further damage at worst case, a bad compressor. If you have a window air conditioner that's not cooling or working properly, these troubleshooting tips can help narrow down possible causes of the A/C problem. In case the AC is not working, you should schedule an air conditioning repair to ensure your AC system is working at maximum efficiency is always a good idea when facing the hot final weeks of summer. Here's how to troubleshoot that air-conditioning system. I been having problems with my car's air conditioning. Replace the fuse if necessary and make repairs on the wires. A few months ago I had the exact same problem and my dealership diagnosed it as a leaking hose and all of the freon was gone. Chevrolet Tahoe AC Is Not Working? RepairPal will help you figure out whether it's your AC Refrigerant Leak, Climate Control Electrical Issue, AC Compressor, or something else. Jones Air Conditioning www. A customer calls and complains that his air conditioning system is not operating properly. The majority of air conditioner compressor issues require professional intervention. I would drive for 10-12 mins when it sould come on. If they aren't working properly, call a trained technician. HomeAdvisor's Air Conditioning Repair Cost Guide gives the average price to fix an AC unit in your house. A few months ago I had the exact same problem and my dealership diagnosed it as a leaking hose and all of the freon was gone. Escort/ZX2 AC problems? Read this Escort Car Forums 98 ford escort , ac does not work. Compressor Will Not Run Contactor Open The contactor should be energized or "closed" on a call for cooling. Could I have messed up my VHS by pulling it home?. The compressor is what pumps refrigerant through the entire system. Only Delphi Compressors are affected, optimised Delphi compressors fitted from August. First, you turn off the power to the air conditioning system. AC Compressor and Clutch. What to check if your air conditioner or heat pump just won't start at all. Read on to find out what the most common air conditioner problems are — and how you can fix them. This article will help you decide on what to do when the AC compressor clutch is not engaging. We work directly with manufacturers to offer OEM new AC compressors at a fraction of the dealership list price. Find the cost of recharging the AC or fixing a freon leak. I've got the haynes and can't find anything. only claim I. Car Air Conditioning Problems - Diagnosis and Repair When your car's air conditioning stops working, it can be exceptionally frustrating. Chevrolet Cruze owners have reported 8 problems related to air conditioner (under the equipment category). Leaking head gasket on compressor Repair 1. It turned. checked all the wires @ compressor and all have 120 volts. if you have all of the service records and work done available, that will help. Top Reasons Your AC Compressor Stopped Working. The computer interprets this as an air conditioning demand. I have a 2004 Pontiac Vibe. LG Floor Standing Air Conditioner Troubleshooting Only advanced technologies are used in different types of LG air conditioners: from modern inverter compressors and powerful air cleaning and ionization systems to the most advanced LG air conditioner troubleshooting system. If your AC indoor fan isn’t working, first check to make sure a breaker hasn’t been tripped. i tried using a jumper wire to the switch on accumalator. In case the AC is not working, you should schedule an air conditioning repair to ensure your AC system is working at maximum efficiency is always a good idea when facing the hot final weeks of summer. On/off When “ECO HEAT/COOL”mode is turned on, the switch indicator will come on and the “ECO” indicator will appear. I've searched this site (Air Conditioning) for info to get some basic guidance and came up empty. The Compressor is not Always the Problem The fact that a 2003 Volkswagen Jetta AC compressor is not working does not necessarily mean that the compressor is the problem. I checked the fuses and they seem to be fine. The expansion valve is not working. power to activate the relay). We provide same-day Refrigerator Repair service, 24/7 and 365 days a year. The first thing I thought wa. If the compressor is working, but the fan won’t turn, then the problem is most likely with the motor and/or capacitor. Although the belt driven pulley is spinning you can see that the front of the compressor unit is not turning with the engine. It is essential to inspect your car’s air conditioning system from time to time and ensure that it is working properly. If they are lower and the compressor did not come on, then it is undercharged and needs Freon to make the low side switch come on and activate the compressor. Troubleshooting Central Air Conditioners - Minor problems with a central air conditioner can be fixed without a professional. Broken belt 2. You've come to the right place for air conditioner repair help. This is commonly referred as hard starting. The computer interprets this as an air conditioning demand. Start the car and turn the AC on. The quickest way for direct results is to get my Air Compressor Troubleshooting Guide.