M42club.com - Home of the BMW E30/E36 318i/iS

DISCUSSION => Electrical => Topic started by: doitover on July 17, 2013, 10:33:21 AM

Title: ac relays?
Post by: doitover on July 17, 2013, 10:33:21 AM

The AC in my 91 318is has stopped cooling. Could be many things but earlier this year there was a relay clacking sound at low engine speeds that I couldn't determine where it was coming from. That stopped a couple of months ago. Anyway, most A/C's have a clutch relay, I haven't been able to find mention of one for the 318is.

Any idea if there is one and if there is, where it is located?
Thanks,

Title: Re: ac relays?
Post by: DesktopDave on July 20, 2013, 07:44:18 AM

I'm told that there is an Evap Temp Regulator under the dash that controls the compressor clutch.  Looks like a normal relay with six pins.  Found this useful bit out on the web (http://cardealerforums.com/alt-autos-bmw/t1880-e30-c-relay-question-no-power-low-pressure-switch.html).

I'm not sure where it is though, I don't recall one off the top of my head.  I'll go check my spares to see if it's clipped to the heater box.