Quote:
Originally Posted by 1BADM6
Sorry, I just read your post again and noticed you already said you had replaced it. My bad. Did you use genuine BMW t-stat? The cheap ones can fail prematurely. Just giving you ideas. What kind of condition is your cabin air filter and ducting in? Have you checked them recently?
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Thermostat is Wahler OEM.
Didn't check ducts or cabin air filter.
But I am experimenting with Heater Core Sensor. Will keep you updated.
If you get a chance and have an E53 close by, throw a test light on the auxiliary water pump blue wire please. While having the heater/blower on check to see if yours also gives 4 seconds of power and then 20 seconds of no power. I am inclined to believe that this may either be my problem or at least a part of it.
Thanks for your help.