1,6,7,8 - Series and Mini CooperGeneral Chat related to models that do not fit into particular categories above. Please try to put your discussion in more appropriate sections. This section does cover the 1 Series, MINI Cooper and 8-Series vehicles: BMW 830i, BMW 840Ci, BMW 850i, BMW 850Ci, BMW 850CSi, M8, Alpina B12, BMW CS Concept and others.
I have a 92 735i that I have converted the ac to r134 and my high speed fan wont come on. When its hot out, at idle, the ac will shut off because of high ac pressure due to the high speed not working. The fan comes on low speed but not high. Is the problem the fan or the high pressure switch. Also do I have to evacuate the ac system to change the high pressure switch?
Wouldnt the high pressure switch over ride the thermal switch on the radiator if the ac pressure rises too high? Are the fans wired from the relays through the thermal switch? Or could the high speed relay be inop? Sorry for all the Q's but i want to figure this out and BMW are very different than VW that Im used too.
Fans are wired through the relays but directly connected if the AC is engaged, the switch determines fan speed (hi/lo). I sent you a private message and if you respond you will have the BMW ETM (I hope).
^ lol that sucks... does the button work show power?
__________________ 1991 Ford Taurs SHO 5 Speed White on Tan
1996 Chevy Lumina LTZ Rep 3.4L
1992 318i Coupe parts car
1992 325i Ls1 swap with a T56 6 speed 12.2 quarter mile
1976 Mercedes Benz 300D with a Ford 5.0L Fuel Injected soon to be Modded I am Captain Obvious
Yup, an fuses are good. Im thinking a relay is not working because the switch works and the light in the switch vomes on just now poer to the rear window. I read some where the control module for the heating and ac behind the sword may have something to do with it.
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