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Where is the heater control valve in a 1986 Olds 98 Regency Brougham 3.8 with auto temp control?


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Wiki User
2004-11-21 13:01:57
2004-11-21 13:01:57

It is at the rear of the intake manifold, follow the heater hose. there is a flow door under the dashboard with a cable connected is that the control or does the valve body at end of intake still control it?


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It does not have a heater control valve.It does not have a heater control valve.

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The heater control valve is used to shut off hot coolant from entering the core when the heater is in the off position. A heater control valve can be actuated by either a vacuum line or a cable from the vacuum heater control valve to the heater core. This hose should be warm; if not the heater control valve is stuck and needs to be replaced

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Remove the heater control valve and replace it.

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