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When I turn on my heat or A/C, neither happens?

Tiny
JKIRKUM
  • MEMBER
  • 1998 FORD F-150
  • V8
  • 2WD
  • AUTOMATIC
  • 85,000 MILES
The blower comes on, but a steady flow of cool air is all that comes out. Why is that? What could be the problem?
Friday, January 25th, 2008 AT 4:40 PM

3 Replies

Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
Are you saying you get no heat out of the heater?
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Friday, January 25th, 2008 AT 7:19 PM
Tiny
JKIRKUM
  • MEMBER
  • 2 POSTS
That is correct. I get no heat, nor do I get any A/C when I turn that on. All that happens is the blower comes on and blows cool air into the cab. I do have control over whether it blows to my feet, to the defrost setting so it blows on the window, etc indicating that it isn't the control knob. I just can not control the temperature.
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Saturday, January 26th, 2008 AT 2:03 PM
Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
Alright, since that is the case I would check to see if the heater blend door is sticking and not moving freely since you have only 1 temperature no mater what.
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Saturday, January 26th, 2008 AT 2:46 PM

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