Auto Air Conditioning Repair

What You'll Need
Auto mechanic tool set
Fuse wire
Voltage tester
Duster cloth
Fluorescent dye
Pressure gauge

Auto air conditioning system is an air conditioning system makes our travel cozy and comfortable. Basic knowledge of this air conditioner is essential to manage the repairs of this system. If for some unknown reason the air conditioning is not working, try some of the methods given below to troubleshoot the problems yourself.

Step 1 – Check for any Leaks

Add the fluorescent dye to the system and turn on the AC. Wait for few minutes and check for coloring in the coils. If there is a leakage, the dye will make it apparent and then you can get it fixed by a qualified technician or do it yourself.

Step 2 – Level of Refrigerants

Freon is used as refrigerant in the auto air conditioning system. It is a combination of gas and liquid that is compressed and circulated for cooling the air. To check the level and pressure of Freon, attach the pressure gauge to the compressor hose, start the AC system and take the readings. If any one of the measures is below normal, then Freon 134A has to be refilled. Due to environmental issues and strict federal laws governing them, only a qualified technician can refill Freon. Thus, it is recommended to to get the optimum pressure of Freon restored locally from a qualified technician.

Step 3 – Clogged Condenser

Check for the status of the condenser, if it is clogged then the cooling fan closer to it cannot turn on thereby reducing the cooling effect. Clean the condenser with duster to restore the cooling capacity.

Step 4 – Compressor Problems

Compressor is the heart of an auto air conditioning system. In most of the cases, problems with compressor result in inefficient auto air conditioner. To identify the problem, start the car and turn on the AC. Locate the compressor and check if it is running (it produces a humming noise). If it is not working, then the possible reasons could be blown fuse, broken wires, switch problems or low level of refrigerants. Check for any of these conditions, fix it and then re-check the compressor again.

Step 5 - Other Common Problems

At times, the belt of the fan (attached to the compressor and another in front of radiator) could be snapped and so the auto air conditioner might not be working. This is easy to fix and can be done by you. Another possible reason can be bad wiring. Compressors have a wire leading to the electric clutch. Unplug the connector in that wire and connect the wire to the positive pole of the car battery. If you hear a ‘cluck’ sound, then the clutch is fine and other wires and fuses have to be checked. If they are fine and still the AC is not working, then the electric clutch is bad and needs to be replaced.

In case these methods fail to rectify the problem, it is time to take your car to the mechanic.