A Quick Intro to Me. For the last year a.k.a. 40,000 miles that I have owned my 95 850T I can honestly say I probably read this forum once every week and a half. I’ll browse through about 85% of the post’s, what ever looks like it could be beneficial to learn from. Some people tell me I know everything about Volvo, I would say its more like 55% about Volvo and 82.3% about the 850. I’ve fixed numerous things for numerous people, and I’ve been taking things apart since I was 3. I’m going to go to school next month for either Marine Mechanics at MMI or Automotive at UTI where they have Volvo’s S.A.F.E. program, I haven’t decided yet and if anyone would like to give me there opinion on that it’s welcome. This is the first time I have ever made a post, I feel that you can learn more by watching and listening. Ill be giving a tip for the A/C problem that I had, I came up with this and have used it for over a month the only other solution for me was to rebuild or replace the compressor, so for $5 this trick has paid for itself. Now too the A\C subject.

This Will NOT work for everyone.

A/C Symptoms
A/C works fine until it gets hot out, the clutch will disengage even though it has power.

After swift acceleration A/C clutch will not reengage even though I has power.

Turning the A/C switch off for a while, then turning it back on reengages A/C for a little bit.

Basically this fix is for people whose A/C clutch has problems; I believe it has something to do with the windings inside. The thermal sensor should be bypassed along with this fix. I was having the symptoms above at the beginning of the summer, I knew that my compressor would have to be rebuilt or replaced. But I experimented with it and realized that when it disengaged, even thought it had power from the source, if the bypass cable I installed was given even a tap to the positive side of the battery, more voltage, It would reengage. Now at first I tried just connecting the compressor to the battery, and every time I got out of the car I had to disengage it, and sometimes the evaporator would freeze blocking all air from entering the car. So I went to radio shack and bought a relay I wired it to the compressor, to the positive side of the battery, and wired the switch to the power source wire of the compressor. Make sure to break the loop between the original power source and the compressor, meaning disconnect the plug on the compressor don’t just splice it in, if you do once the circuit is completed the relay wont shut off. It’s worked for me for over a month.

Basically unplug the wire to the compressor, wire the compressor side to the OUT part of the relay, and now wire the other side to the relay SWITCH side. Then wire the IN side to the positive side of the battery and clean your terminals while your there. And finally wire the ground side to any ground point on the car.

MichaellWeiss@comcast.net