If all other heat and a c functions are working properly just no heat then it is likely that the valve is faulty.
Bmw x5 auxiliary heater not working.
If you experience no air blowing no heat in my situation as i did in my 2012 x5 35i 88 000 miles battery almost 7 yrs old on the coldest day of the s.
This bmw is overheating even after 2hrs the engine will still be hot after it verheats.
If bypassing the valve makes no difference in your lack of heat you are likely dealing with a clogged heater core.
This problem may be caused if lets say the coolant level is low this can happen if theres a leak in the system.
Bmw ac heater fan not working its 2010 bmw 320d se business edition but same solution applies on 1 series x series.
31 of the time it s.
If low fill system and then have it checked for leaks another problem if the system is not low then you may have a bad thermostat a bad.
The basic thing to do first is to allow the engine to cool down 5 6 hours or even overnight then check to see if the cooling system is full of coolant.