What could cause heater to stop working?

Tiny
ERIKACOOPER
  • 2000 FORD EXPEDITION
  • 177,310 MILES

I have a 2000 Ford Expedition that the heat does not work. The air works great but when you turn the heater on, it seems as though the air is still on-there is no change in the temp of the air coming through the vents. What could cause this to happen?

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Monday, September 24th, 2012 AT 12:11 PM

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Tiny
KHLOW2008
  • EXPERT
  • 41,975 POSTS

The air-mix and venting systems seems to be faulty or stuck and not allowing the proper air delivery. You would need to check the actuator movements etc. Is this an automatic or manual HVAC system?

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Monday, September 24th, 2012 AT 12:35 PM
Tiny
ERIKACOOPER
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I'm not actually sure. It is my husbands trucka nd we just bought it 4 days ago. He thinks it is automatic.

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Monday, September 24th, 2012 AT 2:13 PM
Tiny
KHLOW2008
  • EXPERT
  • 41,975 POSTS

The blend doors are vacuum operated so I would suggest starting by checking the vacuum hoses for leaks.

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Monday, September 24th, 2012 AT 4:32 PM

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