E83 Heater issues

X_Three

New member
Good day, compliments for 2016.

I am posting this thread to ask for advice, and to make life a bit easier for anyone else who might experience this issue in future. I have had numerous successes on technical issues just by reading old posts. So here goes my first post;

My 2007 X3 has automatic climate control, single-zone. Yesterday while driving the auto-temp was set to 22Deg - as always - and I realized the air was not as cold as the day before. The air in the two center dash vents were cold'ish, and the side vents cold. If I set the distribution to either the windscreen or the foot well, the air is very warm. ONLY the two side dash vents are cold.

After reading old posts - haha - I removed the heater valve, tested it, it works 100%. I then found that if I disconnected the auxiliary water pump, the heater valve closed and everything went back to 100% working order. I left it unplugged with the aim to open the motor of the pump this afternoon. On my way to work while driving, the issue returned, the heater valve opened again and the cabin started heating. All this without me touching the controls on the climate control.

My feeling is that it is not anything with the air-distribution-box, the air gets distributed fine, I just think that the heater valve is not suppose to open under the current circumstances.

Any help or ideas will be appreciated
 
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