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Vehicle AC Repair

Vehicle AC Repair

Repairing your vehicle's AC system, requires an experienced mechanic to troubleshoot, since there are so many possibilities for why your car won’t blow cold air. It is the same closed circulations system that creates the heat for the car's climate control, only it has a few more components. And with more moving parts, there are more chances for things to go wrong. Before repairing each and every part, first check to see if your vehicle is experiencing any of the common problems on our list. Getting your car air conditioning to blow cold air is essential. Always use a trusted mechanic, as if you simply try to fix each part while trying to pinpoint the problem, you will end up with a high bill, and your ac still may not work.

Causes of Vehicle AC Malfunction

A car air conditioner will stop working for many different reasons. Below is few of the most common problems we see.

If the antifreeze or coolant level in the radiator is low, because of a crack or leak.

The ac compressor needs replacement. If the compressor is not working, it won't allow the Freon inside the pressurized lines to compress and the condenser will not run.

A blower motor has seized up, or stopped working.

The coolant system has buildup preventing it from correctly flowing throughout the heater core, radiator, condenser.

The condenser fan motor has stopped working and needs to be replaced.

The high pressure air conditioner hose line has a leak.

The low pressure air conditioner hose line has a leak.

Possibly an ECU(small computer located under the dash) has bone bad and will need to be replaced. This computer controls many aspects of the vehicle.

You will notice that although it is your vehicle AC system you are trying to fix, most of the reasons revolve around the radiator, and condenser combo. This is because as the Freon passes through the system, it is turned from hot energy to cold air at the condenser. To repair the air conditioner in your car, you must first check that there are no leaks in any part of the system. If the ac system has a hole in it, the Freon will escape, and the heat transfer from the compressor to the condenser will not function. If the system has buildup circulating inside the lines, there may be an insufficient amount to regulate the temperatures correctly. Of course, if your blower fan motor is out, then your vents will not be able to blow cold air into the cabin.

Checking the vehicle for obvious ruptures in the lines is, the first step to narrowing down what is causing the car AC malfunction. This is done with a vacuum. The air conditioning lines are emptied and if the vacuum pressure remains, it signals there is not leak. If there is any fluctuation from when the line is brought to vacuum, it is evidence that the system is compromised and will not work until it is repaired. The ac lines punctures or small leaks, slowly allowing the Freon to seep out. Hose repairs, are normally fast, easy, and relatively, inexpensive compared to, for example, exchanging the ac compressor. Replacing the condenser, if cracked, is another repair that doesn't require as many hours in labor. It will double as a repair for your heater, as well as keep your vehicle from overheating.

Unlike the blower motor, replacing the condenser fan is much more important. Not only will a faulty fan prevent your air conditioning from functioning the way it is designed, but it could lead to overheating and possibly engine failure. If the condenser becomes blocked, the lack of air flow to the radiator may cause the engine to overheat, potentially cracking the block, or rupturing a head gasket.

If you experience any of the aforementioned signs while your air conditioner is not working, make sure to call your Fast and Friendly Mobile Mechanics to come and get your vehicle repair done by us before your problems get worse.

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