How Auto Air Conditioning Works:Air conditioning is the process by which air is cooled and dehumidified. The air conditioning in your car, your home and your office all work the same way. Even your refrigerator is, in effect, an air conditioner.
Air conditioning systems operate on the principles of evaporation and condensation. The principles of evaporation and condensation are utilised in your car's A/C system by a series of components that are connected by tubing and hoses. There are six basic components:
Refrigerant is the life blood of the A/C system, a liquid capable of vaporising at a low temperature. Due to the harmful chlorofluorocarbon (CFC) in the formerly used R-12 refrigerant, all vehicles built after 1996 use R-134A, a more environmentally friendly refrigerant. The latest refrigerant R1234yf is currently coming on-stream and now being used in vehicles in Australia and New Zealand. Mobile workshop vehicle air conditioning service units are now available for those vehicle workshops servicing auto A/C units. There are also hybrid units available incorporating both R134A and R1234yf.
Here's how an air conditioning system and its components work:
Almost every vehicle's A/C system works this way, however certain vehicles may vary by the exact type of components they have.
Basic Auto Air TroubleshootingIt is rare to have many problems with modern auto air conditioning. Most problems that do arise stem from one of two things: no cool air or insufficient cool air. If you own an older car and its A/C system doesn't seem to be working properly, here are some general troubleshooting tips:
No cool air – possible problems:
Insufficient cool air - possible problems
Most A/C repairs are best left to an expert technician. Recharging the refrigerant in particular requires special equipment. Contact Coolvac’s team of experts to discuss your issues.
Recovering Gas from a VehicleWhen recovering gas from a vehicle, ensure it is done at a moderate pace. Most automotive A/C systems take on average 100-150ml of oil. This oil is circulated with the gas around the system and at any one time. If too much oil is removed from a system the compressor will fail prematurely. Most automotive recovery machines have an integrated oil separator. This separator is only so efficient at extracting the oil from recovered gas. If gas is recovered too fast, users run the risk of the oil being pumped into the reclaim bottle and thereby are unaware of how much oil the system is short of.
As a general rule, recover from the low side of the vehicle A/C system first. Limit the speed of recovery by throttling the valve on the recovery unit. When the majority of the gas has been recovered, the high side may be used to recover. This ensures no liquid refrigerant carries excessive amounts of oil back into the recovery unit.