Bmw E34 Heater Valve Diagnosis

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Bmw e34 heater valve diagnosis.

If i isolate the heater valve electrical supply on the valves themselves and feed 12v direct from another source then they switch off ok and the heater core goes cold. In this video i go over what was wrong and show how i fixed it. Bmw home bmw 5 series e34 1989 1996 ventilation a c heater system. Heater system page 2.

Has spent hours hooked up to the bmw diagnostic system at my dealer and they cannot find the faults. Bmw e34 and e32 have a funny tendency to loose the heat in the middle of winter. Brand rating 10 75 hvac heater hose. My relatively new heater valve stopped working.

This is an easy task you need to remove the 4 bolts on top of the heater valve disconnect the wires and then pull the valve out. The default position of the valve is to be full open. If the heat will not turn off you likely have either a faulty heater control valve opens and closes the flow of hot engine coolant through the heater core or climate control panel output to the heater valve. If this happens to you time to check the heater valve.