AUTO AIR CONDITIONING REPAIR CENTRE IN PERTH
Airconditioning Service & Regas!
Have you been sweltering in your car because of a broken air conditioner?
At AME we really care about your car and you. Here’s a short guide to how air conditioning (AC) works, why it might not work, and what can be done about it.
Your air conditioning system is made up of a compressor, a condenser, an evaporator (or drier), refrigeration lines and a couple of sensors here and there.
Car air conditioning service & regas process
The compressor puts the refrigerant under pressure and sends it to the condensing coils. In your car, these coils are generally in front of the radiator. Compressing a gas makes it quite hot. In the condenser, this added heat and the heat the refrigerant picked up in the evaporator is expelled to the air flowing across it from outside the car. When the refrigerant is cooled to its saturation temperature, it will change phase from a gas back into a liquid (this gives off a bundle of heat known as the “latent heat of vaporization”). The liquid then passes through the expansion valve to the evaporator, the coils inside of your car, where it loses pressure that was added to it in the compressor. This causes some of the liquid to change to a low-pressure gas as it cools the remaining liquid. This two-phase mixture enters the evaporator, and the liquid portion of the refrigerant absorbs the heat from the air across the coil and evaporates. Your car’s blower circulates air across the cold evaporator and into the interior. The refrigerant goes back through the cycle again and again.
Leaks are easy to spot but not easy to fix without pulling things apart. At AME we carry a fluorescent dye that can be added to the system to check for leaks. If there’s a bad enough leak, the system will have no pressure in it at all. We’ll find the low-side valve and with a gauge check the PSI level.
At AME we DO NOT do venting, i.e., use anything else to poke in the valve to see if it will come out. VENTING IS ILLEGAL
If the AC is not working it might be because of the compressor, and the reason ccould be a bad fuse, a wiring problem, a broken AC switch in your dash, or the system could be low on refrigerant (most systems have a low-pressure safety cutout that will disable the compressor if there isn’t enough refrigerant in the system). We will check for all this and fix anything at bad.
Other things that can go wrong
Bad switches, bad fuses, broken wires, broken fan belt (preventing the pump from turning), or seal failure inside the compressor could be the cause of AC failure. At AME we will carefully inspect and replace any faulty part.
Please note: if you have an older car that still uses Flurocarbons (CFCs) it is VERY important to turn on your air conditioner in your car for at least 5 minutes every week to stop the air conditioning system seals from drying out and leaking the CFCs into our atmosphere as the CFCs depletes our precious ozone layer. All the new cars use a refrigerant (CFC free) known as R134a. This refrigerant is significantly less damaging to the environment.