In a nutshell my 2002 Volvo S80 climate control is making a noise like a constant release of air, almost as if punctured. If I turn the system off the noise stops immediately. As soon as I turn it on it starts making the noise immediately. I've fiddled about with the controls and have noticed that it is now not blowing anywhere near as cold as I would expect it to be when put on maximum blow on the coldest setting.
Anybody any ideas what is amiss here?
Thanks.
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It sounds more like a fan/control flaps problem to me than a compressor/air con system fault. If the air con system was punctured then the refrigerant gas would have escaped in a very short period of time, a few minutes. The low pressure switch on the system would then stop the compressor from starting. You would get no cold air at all, then.
I would start with the easiest check, is the pollen filter clogged up or has it broken up and is blocking some airways?
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Thanks for your reply, mjm, I'll check this out.
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If the gas gets low you can sometimes hear it hissing through the expansion valve. I seem to remember there was also a technical bulletin for faulty expansion valves making noise. Speak to the dealer about the expansion valve, then see if it has enough gas in it.
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Thanks, Dave N. I'll do a bit of research and see if I can turn up that TSB.
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Hi, I have the same hissing sound in my v70. Can you tell me what you found out? Thank you!
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