Bmw E34 Heater Valve Diagnosis

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Bmw e34 heater valve diagnosis.

If this doesn t work change the heater valve and the auxiliary pump. Heater valve to left side of heater pipe 525i wagon 1992 95 heater valve to left side of heater pipe 535i sedan 1989 93 middle heater core. Heater system page 2. In this video i go over what was wrong and show how i fixed it.

If this happens to you time to check the heater valve. Bmw e34 and e32 have a funny tendency to loose the heat in the middle of winter. The default position of the valve is to be full open. Bmw home bmw 5 series e34 1989 1996 ventilation a c heater system.

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. 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. Brand rating 10 75 hvac heater hose. 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.