1999 FORD EXPEDITION, THE HEATER IS BLOWING COLD AIR. WHAT MIGHT BE CAUSING THIS PROBLEM?

  • Tiny
  • RJSTES
  • 1999 Ford Expedition
  • 15,000 miles

When is heater **** is all the way to heat with high fan it blows cold air.

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Monday, December 19th, 2011 AT 10:38 PM

1 Reply

  • Tiny
  • saturntech9
  • Expert
  • 29,354 posts

The first thing I would do is make sure both your heater hoses going into the heater core are getting really hot when the engine is up to normal operating temp.

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Monday, December 19th, 2011 AT 11:15 PM

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