AO Silver Member
Join Date: Apr 2002
Re: Aircon questions from me too!
Well, servicing it every year is overdoing it a bit. Having the AC system optimized by a specialist is a good idea though. They will basically evacuate the gas, clean it and then feed it back in. When theyre charging the system they'll monitor the performance , in doing it so the system can be made to perform it's best, with the least possible engine power drain. When the system is being serviced, often a tracing agent is added to the system, making future troubleshooting easier and cheaper.
Older aircon systems had a reciever/drier/filter built into them. Unfortunately no more, and if they do, they're often built into the AC radiator. So there's no point in having the system serviced every year, as the filter cannot be changed anymore.