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Problem with heater (archive)
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Posted by Matt L. on November 19, 2001 at 22:48:31:

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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