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

1999 Ford Expedition

Tiny

RJSTES

December, 19, 2011 AT 10:38 PM

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

FOUND 4982 RELATED QUESTIONS

No Heat

37 ANSWERS
5 IMAGES

1 Answer

Tiny

saturntech9

December, 19, 2011 AT 11:15 PM

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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