Where is the heater flow control valve in a 1993 cadillac deville?
Tuesday, March 15th, 2011 AT 1:41 AM
This vehicle does not use a Heater Control Valve (Coolant Valve) as coolant is always circulated through the heater core. Rate of coolant flow through the heater core is established by the Coolant Flow Restrictor.
Temperature is controlled with the Air Mix Door which allows or restricts the flow of air through the heater core case.
Tuesday, March 15th, 2011 AT 1:44 AM
So if I have no heat its the heater core than?
Tuesday, March 15th, 2011 AT 1:48 AM
Its on the hoses that go to a/c case. Their is a vacume hose going to it. If u manually open the valve when hot heat will come out vents. Be carefull use a rag to hold it. Its a easy and cheap fix gl