1999 Cadillac Deville heater does not get hot

Tiny
CLARKSTANLEY1
  • MEMBER
  • 1999 CADILLAC DEVILLE
  • V8
  • 2WD
  • AUTOMATIC
  • 186,000 MILES
I have the automatic temp control the temp is set to 90 but does not get hot the fan only blows cold air
Thursday, December 10th, 2009 AT 9:59 AM

1 Reply

Tiny
FACTORYJACK
  • MECHANIC
  • 4,159 POSTS
Cold on both sides? If you feel the heater hoses where they enter the core(behind rh strut tower), are they hot? If so you have an actuator or blend door problem. If you can place your hand on all hoses after the vehicle has reached what is perceived to be operating temp, you could have a thermostat that is stuck open, or not regulating temperature. By using primarily 'auto', you would also have refrigerant flowing in the evaporator, which would cool down the warm air even more. Also verify the coolant is full.
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Thursday, December 10th, 2009 AT 10:09 PM

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