I have a 2000 Volvo S70. It is about 100 degrees out and the air conditioner works normally for about ten minutes. Then the compressor stops cycling and it blows warm air. If the car is left sitting with the engine off for about 15 minutes then the air conditioner works normally again for about ten minutes. The car does not seem to be over heating.
Any ideas anyone?
...Larry
Could be unrelated but had a similar problem with my S80 a couple of weeks ago. Turned out the engine cooling fan had gone bad - one (free) replacement later and all sorted.
Most likely the thermo cutout on the compressor- this is a well known fault. Convieniently you can bypass the cutout by unplugging each end of it, and then joining the two together- they're bullet connectors. Easy peasy.
Tim..
First you have to make sure the fan is working properly. If either the coolant temperature gets too high, or the high pressure on the A/C gets too high, then the computer will shut the A/C off. Then make sure air can flow through the rad and condenser (not block by leaves or garbage). Unfortunately, after that you need to hook it up to fancy electronic tools to check what various sensors are reporting.
I know where the compressor is, where is the thermal cut out? Is it located on the compressor?
...Larry
I looked at the compressor. There is a wire coming out of the harness that goes to a simple connector. Then the wire goes directly to the clutch.
....Larry
The fan does cycle off or on. There are no blockages to the air flow.I am told there is a thermal cut out on the compressor but I can't find it. There is simply a wire from the harness through a connector to the clutch.
...Larry
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That thermal cutout was eliminated because of the problems it was causing. It's not present in either of my '98s.
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