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3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

 
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#1 (permalink) Old 01-25-2004, 12:27 AM
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I hope someone can help me with the following.
Lately while driving and the car has warmed up the heater fan starts picking up speed until it's blowing at full blast, while the light bar stays where it was (usually at a low setting). After about 2 - 3 minutes the fan speed goes back to normal.
I have also noticed today the temperature gauge needle moves from midway (straight up) back to about a quarter of the gauge.
Does anyone know what could be happening? Is the fan blowing harder to compensate for something that may be happening to the heating system?
Thermostat being stuck? I'm a bit at a loss here.

Thanks in advance.

Roy

1996 E36 M44 318i 5sp LSD
Canadian Model
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#2 (permalink) Old 01-25-2004, 08:09 AM
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its a possible problem with the thermostat.. keep an eye on your temp gauge.

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#3 (permalink) Old 01-25-2004, 11:05 AM
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It sounds like 2 seperate problems. I agree about the thermostat possibly being stuck open.
As far as the fan, it could be a fan speed resistor, or it your car has an auto function for the ac, then it is just doing it's job-when the ac is on auto, the fan speed can fluctuate.
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