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Cadillac heat problems

Tiny
GARETT007
  • MEMBER
  • 1993 CADILLAC DEVILLE
  • V8
  • FWD
  • AUTOMATIC
  • 280,000 MILES
Where is the heater flow control valve in a 1993 cadillac deville?
Tuesday, March 15th, 2011 AT 1:41 AM

3 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
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.
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Tuesday, March 15th, 2011 AT 1:44 AM
Tiny
GARETT007
  • MEMBER
  • 7 POSTS
So if I have no heat its the heater core than?
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Tuesday, March 15th, 2011 AT 1:48 AM
Tiny
CADIEMAN
  • MECHANIC
  • 3,544 POSTS
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
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Tuesday, March 15th, 2011 AT 2:35 AM

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