E46Fanatics - View Single Post - E46 not blowing heat when stationary but getting heat when driving
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Old 11-29-2012, 11:13 AM   #13
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Join Date: Sep 2012
Location: Old Greg's Cavern
Posts: 12,672
My Ride: '13 128i, '04 330Ci
Originally Posted by aikmanson View Post
The temp gauge is a bad indication of actual coolant temp. We know that the gauge is buffered from 75-105 (or is it 115, regardless) degrees celcius. The only true indication of coolant temp should be done using the OBC menu. Especially when diagnosing a potential problem with the car.
This is correct to an extent. My needle will move slightly left (I mean very slightly) at 75-80. After 74 it moves to almost the first white mark. My Tstat is definitely stuck open as my temperature varies heavily with speed.

I agree with tonyguns. Bleed the system. Neotate, I also must ask, does the heat start working if you are not moving but increase the engine RPM? Say you increase it to 3000 RPM while standing still. Does the heat start working?
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