When I turn my heater on... It stays hot all the time... I try and manage the temp but it stays hot all the time... I have to turn it on then off til it gets cold, then on again... help!
HEATER 1997 Explorer on 1997 Ford Explorer
The heater valve may be defective or the vacuum supply to it is affected in some way. You can check, or have someone check the vacuum supply to the valve when the heat is turned off, and make sure the hoses are OK too.