After reading up on the hvac repair (thanks hitmanx) I have decided to start tearing into mine.
The buttons all seem to work and most functions are actually working but I have heat all the time.
The heater valve does not hold vacuum so that will be my first place to start. I removed the hose and it doesnt seem like I am getting any vacuum from the red line when the dial is set to cool.....should I be concerned with this now or wait and see what happens after the valve is replaced?
Also can the heater valve be rebuilt like the others or is it different inside?
Thanks in advance for the help, I have learned a lot through searching this forum.
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I went through the tests and troubleshooting from bmw and it looks like all temperature sensors are ok.
The heater valve will get vacuum when the blower is switched to the off position, but still remains open (no vacuum) when the blower is turned on and the temperature selector is all the way down.
I will continue to troubleshoot and see what I find......
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I was about to give up but I thought I might as well try any part I can from my parts car....It works! Had to replace the control unit under the drivers side. Works like new, now I just have to fix leaking pods......
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Alright. Gotta love parts cars!
Two E23 parts cars. You might get lucky with a phone call. https://www.specializedgerman.com/us...ries-e23-parts
1990 735I (Auto) E32 Feb 1990 to Present
1996 Z3 Roadster (5 Speed) E36/7 Jan 1999 to Dec 1999
1983 733I (5 Speed) E23 April 1983 to Feb 1990
https://www.youtube.com/watch?v=2d4tHoHGaJo
https://1drv.ms/v/s!Av20xCMMocSsyEpl...h_oOk?e=ekIcAT
I recommend a new heater valve, it is plastic.
I make E23 parts.
09/1983 745i (stolen spring '13 around Houston, TX Achatgruen on nutria buffalo. 8481080)
10/1984 745i
11/1984 745i
11/1984 735i (10:1-265/6)
Ford, MB, and GM round out the pack.
Thanks for the response I will get one coming. Most of the other pods are holding vacuum for now.....I will probably go through them this winter when I need a good project to keep me busy.
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Single tit ones are easy to rebuild. Duals are a pain, Pavel knows how. I just replace duals.
Defrost, cowl, face are your duals with ACC.
I make E23 parts.
09/1983 745i (stolen spring '13 around Houston, TX Achatgruen on nutria buffalo. 8481080)
10/1984 745i
11/1984 745i
11/1984 735i (10:1-265/6)
Ford, MB, and GM round out the pack.
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