ac compressor preventing car from starting

When the cars cabin temperature is high, it increases its refrigeration capacity until the desired temperature is reached. Once the desired temperature is reached, it automatically reduces its capacity to maintain the desired temperature. If you turn on your air conditioner and you only get hot air blowing out of the … I had to get it towed to the shop. no... when you try to start a vehicle, nowadays, the a/c compressor clutch is not energized. A seized A/C pulley won't stop it from starting. The AC compressor is the most integral part of the air conditioning system and is responsible for pressurizing the refrigerant and distributing it. When the Fan motor goes bad the compressor will kick on for a short while then stop when the … Alternator is no longer turning. This can also be tied to a bad capacitor since Start Run capacitors are used to start the condensing fan motor. If you have an issue with your vehicle someone here can probably help you. Do you know of a way to get the pulley to free spin or do you think the bearings are so bad that it's jammed? First thing is to start with checking the freon pressure. In order to successfully replace the AC Compressor Switch, adhere to these steps: Drain all refrigerant in the AC Compressor. An auto AC compressor receives electrical power via a wire that connects it to the electric clutch. But the a/c compressor that was known to be failing totally locked up and once it did the car wouldn’t start even with a jump start. Check to see if the condenser fan at the top of the condensing unit starts. Probably the easiest thing to do is locate the appropriate relay and pull it. Powered by Discourse, best viewed with JavaScript enabled, A/C Compressor Lockup Keeps Car From Starting. So, how to release Freon from car air conditioner? There is a big belt wrapped around all the accessories on the engine and driven BY the engine. New comments cannot be posted and votes cannot be cast, Cartalk is full of redditors with a wide variety of automotive background ranging from professional mechanic to guys who have restored entire cars in their garage. George, yes, you are correct. It should be spinning along with the accessory belt as the AC is set on high. If your car’s ac compressor goes bad or fails over time, your engine can seize due to the stuck compressor. Eventually the battery runs down and the car stops moving. (We had to add that last part for good reason, sadly. Water pumps, alternators and power steering are nice things to have. I think you should get another technician to look at the vehicle I hadn't been driving it but went out to start it and it would crank but not turn over. When a compressor fails, you may find yourself having to replace the entire unit. There are many other styles of pressure switches. We love those things. No Prius Podcasts. That part could clog up, but lock-up wouldn’t normally apply to the condenser. Your title says the “condenser” locked up. Click on the image to get more detail on the gauges. Compressor. AC not working in car. Bad oil: As with a car, if the oil in the compressor becomes viscous, it will ruin the motor and cause a failure. Sometimes, the removal of the cooling substance becomes necessary when repairing the AC system. She thought it was a bad battery. So it wouldn't be the problem until you release the … It also syncs with the car’s defroster to prevent window fogging. Got a juicy car meme? Also have you tried to spin the pulley by hand with the belt off? ), Looks like you're using new Reddit on an old browser. If you notice the compressor hard-starting, call for technicians right away to see if it needs lubrication to prevent failure. When the comp… The AC pressure switch is the part responsible for monitoring the pressure. 8 steps to preventing compressor failure. I believe you can just replace the pulley, at least you can on my car. Press question mark to learn the rest of the keyboard shortcuts. I’ll see if I can edit both the post title and in my OP. The chance of damage to expensive electrical parts is just too great . How to Prevent Musty, Mildew Smells from Car AC Your first task of action should be to locate the drain tube in your vehicle and ensure that it is functioning properly. Tightening the connection or replacing the faulty wire should correct the compressor seize. Now it makes sense. Static pressure will give you a good idea if the system has enough freon to tell the compressor … If your car AC has a multifunctional compressor, then its most likely putting too much load on the car engine. The range of pressure between the air compressor stopping and then starting is in the 20 – 30 PSI area. Compressor Won’t Start. Edit: because the original question is very generic and lacking detail it has attracted my answer this way. A road side service with a battery pack is about 25.00 and that is what I do. A bad condensing fan motor will stop a compressor from working. The A/C pulley is on a clutch that allows it to free wheel … First time I’ve ever used my late dad’s jumper cables. Marnet May 2, 2018, 2:40am #6 George, yes, you are correct. I at first thought a battery problem but after cleaning, charging, and testing it the battery is fine. My error. Great thanks for the info. Will a bad AC compressor affect the engine? Remove the old AC Compressor Switch and replace with the component. After replacement I could hear a minor grinding noise and a faint burnt smell. Thank you for bringing it to my attention. #3. There is a clutch at the end of the compressor. Ah, didn’t realize the serpentine belt would be involved. If it's the compressor making the noise and not the pulley/clutch, that should work. Hot Air From Vents. Unlike the old fixed displacement compressor (FDC), the variable displacement compressor (VDC) automatically varies its pumping capacity to meet air-conditioning demands. eye roll). These are 8 areas that need to be regularly checked or addressed to keep your AC compressor healthy. Could this have an impact on the car turning over? Some of the causes for an automotive air conditioner's compressor locking up are improper lubrication, low coolant levels, and low-quality or incorrect types of refrigerant. Other related signs are the compressor requiring longer rest periods between cycles and the compressor being much slower in reaching peak operation. Please share as part of the Cartalk community. The compressor is the part the engine turns via the serpentine belt. But they suggested I can make an appointment to double check everthing if I want. You will need a set of AC pressure gauges to check the following. Electrical problems. When there is enough pressure for the compressor to run safely, if the AC pressure switch fails, the compressor will not receive a signal to start, and therefore, you will not have a running air conditioning in your vehicle. A bad ac compressor preventing a car from starting, that's an interesting one. Turn off the engine and open the hood to find your AC compressor. Multifunctional compressor AC cooling system usually requires a huge volume of power from the engine placing too much load that the compressor might not be capable of handling. The compressor is the part the engine turns via the serpentine belt. Basically, … Check behind the large hoses that may be obstructing your view of the compressor. The A/C compressor being faulty will not stop the car from starting. Try disconnecting the electrical connector at the a/c compressor then trying to start the vehicle. If the compressor and its clutch lock up solid, that belt won’t move when that little starter motor tries to turn the engine to start it. Check whether your car’s AC compressor is engaging or not. Short cycling happens when the cooling cycle becomes much shorter than the usual 10 minutes, causing the compressor to turn on and off more often than usual. Look for a silver metal cylinder with belts, tubes, and wiring connected to it. An electrical failure can result in a buildup of acids that cause a great deal of … The condenser is sort of like those coils of tubes at the bottom of your fridge. If the compressor locked up, it could prevent the engine from rotating and therefore it wouldn’t start. Did you mean the “compressor”? Let’s find out. When an A/C compressor seizes up it will either destroy the electric clutch that engages it or do something bad to the belt that drives it. Bacteria builds up on the air conditioner’s evaporator coil in the … What Causes Short Cycling 1. I admit I was very unhappy about using my car as the “jump donor” and think I just won’t again. If your compressor stops at 120 PSI for example, it would typically start around the 90 PSI tank pressure level. If it DID start, it would squeal like a 500 lb hog and smoke like a tire fire! Automotive air conditioning compressors require frequent maintenance. A seized A/C pulley won't stop it from starting. Professional maintenance can prevent a car's air conditioning compressor from seizing, or locking up. Both she and I are curious to know (despite her husband opining that women don’t need to know such things. You might want to bring your vehicle into a trusted dealership or repair shop to prevent causing further damages to your vehicle. The site may not work properly if you don't, If you do not update your browser, we suggest you visit, Press J to jump to the feed. As everything on my car is working fine since attempting the jump the answer is likely not. I did a quick look on Rock Auto and it shows that you can buy a belt for your car that excludes the AC. Compressor failure tends to happen due to problems in another part of the system that lead to increased strain. And, within 2-3 days, the car would not start at all. But the shop she had the car towed to determined the battery and alternator are good. Doing this every couple weeks or so keeps the compressor shaft-seal lubricated, which can prevent most shaft seal failures. If the compressor locked up, it could prevent the engine from rotating and therefore it wouldn’t start. Higher Temperatures Than Normal In The Cabin. Have an answer or just a good tip? Tools to Keep in Mind. I had someone sit inside and start it while I looked to see if any pulleys weren't turning and lo and behold the a/c compressor pulley was stuck. While AC pump noise is totally normal for your car’s air conditioner, hissing at any other point may give you reason to visit your mechanic, just like a buzzing noise. Finally, we are going to discuss the AC compressor’s function in a nutshell. Marnet , that is something I will not do anymore. When the AC is on, the compressor clutch activates, wherein the drive belt on the engine now turns the compressor which in turn is compressing refrigerant so you can be nice and cold. An A/C delete/bypass pulley for your application would be a way to go, but it will involve pulling the compressor. But, it'd run fine once it got going. Pair of typical pressure switches for different types of compressors. If your car is not used often and/or is stored for much of its life, simply start the car and run your air conditioning (with the compressor engaged) for approximately 30 seconds. Start it and set the AC to high. The Idle Control Actuator is what controls the engine idle. I would say that's your problem. This excessive stopping and starting adds wear on the compressor while robbing your home of its cooling comfort. Then, my AC suddenly started shooting out humid air. Acid and moisture: With our humid climates, moisture in the compressor is a constant concern. Also have you tried to spin the pulley by hand with the belt off? The main tool used to check AC condenser components is an electric multimeter. Happened to a friend’s 2001 PT Cruiser. Compressor seizes causing serpentine belt to break or come off its pulley. The air conditioning system in a vehicle controls the temperature inside the cabin to keep it at a comfortable level. ), The mechanic at the shop my friend used didn’t explain why/how the locked up compressor prevented the car from starting. When the AC is off, the compressor clutch does not activate, meaning the AC is not straining the engine. I have a 95 Mercury sable 3.0L. The other part is that the AC pump was locked and the serpentine belt just would not every thing turn and if it had started the belt would have fried in a heart beat. Last week I had the serpentine belt replaced because it had been whining and eventually broke. It is possible that the refrigerant may be low again or you may have a bad pressure sensor in the AC system. One of the first signs which is really to recognize … Problem: Water on the Floorboards. You know, the ones that are really awkward to clean? If your compressor stalls during startup – or worse, won’t cut on at all – overheating could be the root cause. The A/C pulley is on a clutch that allows it to free wheel when the compressor does not need to be on. (I’m the one who tried giving her a jump. Turning off your car will cause the Freon to move from the high-pressure part of your AC compressor down to the side with lower pressure to equalize out. If it starts, then the compressor clutch and/or electrical circuit is the most likely cause. This set costs about $35. If you are unable to run do this, fear not. A loose connection or short in the wire can cause the compressor to lose power and seize. A condenser fan motor that is locked up will prevent the compressor from starting. Troubleshooting AC compressor … Curious to understand why a failed a/c compressor that locked up prevents a car from starting? At first, you need to do is turning on the car. (I’m the one who tried giving her a jump. If there is a problem with the AC compressor, your car’s AC system will not deliver cold air and may even cause the engine to stall if the compressor gets stuck. AC Compressor - Can't Start My Car (1999 Mercedes-Benz E320) My car was having trouble starting. I've done this on a few different cars and will get you going until you can get the compressor replaced. Open the hood and look on the left side near the front of the vehicle for your AC compressor. I stopped by my mechanic shop today to ask if I damaged my car. You may need to remove the existing rubber O-ring gasket during the process.

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