Heating

Tiny
JCTUMAN
  • MEMBER
  • 2003 CHEVROLET MONTE CARLO
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 83,000 MILES
Car heater is working but blowing cold air. It also takes a long time to heat up. Frost is on the inside of windshield. What is the problem?
Tuesday, December 28th, 2010 AT 9:53 PM

1 Reply

Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
If both heater hoses comming from the heater core are hot, the blend door is NOT moving, if the inlet hose is hot but outlet is cold, the heater core needs more flushing, or replacement. If both hoses are cold, check antifreeze level and thermostat, also rarley but known to happen is the impeller blades on the water pump disolve over time and may not be pumping enough.
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Tuesday, December 28th, 2010 AT 9:55 PM

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