To change the heater control valve in a 1990 Oldsmobile 98, first, ensure the engine is cool and disconnect the battery. Locate the valve, typically near the firewall on the passenger side, and remove the hoses connected to it by loosening the clamps. Unscrew the mounting bolts to remove the old valve, then install the new valve in reverse order, making sure the hoses are securely attached. Finally, reconnect the battery and check for any leaks after starting the engine.
Remove the heater control valve and replace it.
It does not have a heater control valve.It does not have a heater control valve.
You take it to a AutoTech.
Where is the the heater control valve??
where is the heater control valve
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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You don't have a heater control valve for this truck.......
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