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2002 Cadillac Escalade Heater doesn't put out enough heat.

Tiny
RDK4514
  • MEMBER
  • 2002 CADILLAC ESCALADE
  • V8
  • AWD
  • AUTOMATIC
  • 100,000 MILES
The heater on my 02 escalade doesn't put out enough heat unless the dial is turned all the way up. I had the thermostat changed and replace the antifreeze but this didn't change anything. I suspect the heaer control valve isn't letting enough coolant into the heater core. Please advise. Thanks
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Friday, December 4th, 2009 AT 8:26 PM

1 Reply

Tiny
FACTORYJACK
  • MECHANIC
  • 4,159 POSTS
There is no heater control valve, coolant always flows through core. It is an automatic system that relies on sensor values, until you select max heat(90) or max cool(60). It is possible that you have low flow through the heater core due to restriction, you have a fault in the system allowing cold air to blend and cool the warm air, poor airflow across the inside temp sensor.
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Monday, December 7th, 2009 AT 10:17 PM

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