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Re: Problem with heater (archive)
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Posted by TWAMfan on November 20, 2001 at 20:57:30:

In Reply to: Problem with heater posted by Matt L. on November 19, 2001 at 22:48:31:

One more simple thing to check is your engine temp guage. Sounds like it warms up while sitting still idling, producing heat. Once driving on a highway, check temp. If temp goes below normal operating indication, suspect a bad thermostat. I had the same symptoms with my M6 and solved the problem with a new thermostat. BMW thermostats gererally fail open.

HTH
Jim


This morning my heater suddenly began blowing cold air. Everything had been working fine. I checked coolant level, fuses, everything checks out. The strange thing is. If the car is idling, it blows hot air. But as soon as you begin driving, it goes back to blowing cold. I thought it might be vacuum leak, but haven't had any luck finding it. Has anyone ever experienced this? Any ideas as to what could be causing this problem?


Cold in Missouri
Matt L.
88 M5




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