95 Volvo 850 T5R how-to bypass a/c thermal switch

Post by **phils94850** » 18 Jun 2014, 08:07

Since its that time of season and I had problems with my A/C thermal causing me problems I thought I would do a "how-to" on bypassing it. I couldn't find anything with pictures so here you go

First pic is of the A/C thermal ( after I've cut the wires on both ends ) but it gives you a clear shot of what it looks like

second pic shows the connector you need to disconnect that comes from the harness to the thermal

This is the wire coming out of the back of the thermal ( back side of compressor ) cut it as close to the thermal as you can

This is the wire stripped coming out of the front of the thermal getting ready to connect to the wire that went to the back of the thermal

Wires tied together ( should use a butt connector or solder ) I did this for a quick pic...

Finished result.. just plug the connectors back together and your done.. basically you should have what looks like in the first pic ( a square thermal with wires cut on each end )

Post by **pkc303** » 18 Jun 2014, 20:06

Thank you. Nice write up.

Post by **phils94850** » 19 Jun 2014, 07:46

my pleasure

Post by **BEJinFbk** » 19 Jun 2014, 08:12

Isn't that a protective device?
Why not just replace it?

Post by **jimmy57** » 19 Jun 2014, 09:21

The high temp switch was problematic and was deleted later. The compressor mfr left it on as it was not needed by Volvos with hig pressure switch since that also is the protection fro compressor overheat.
I deleted them by unplugging the power lead from engine harness to wire into switch and unplugging the wire out of switch to the wire to clutch magnetic coil. Then you plug the power wire directly to clutch coil wire leaving the switch wires hanging in the breeze.

Post by **phils94850** » 19 Jun 2014, 13:38

what jimmy said

Post by **BEJinFbk** » 19 Jun 2014, 18:42

Cool - Thanks for the back story.

Post by **matthew1** » 24 Jun 2014, 11:29

Very nice, Phil. I'll put this in the Volvo Repair Database.

Post by **phils94850** » 24 Jun 2014, 19:40

thanks matt.. just trying to give back