Mechanics

HEATER BLOWS COLD

2000 Ford F-150 • V8 2WD Automatic • 87,000 miles

2000 Ford F-150 XL mileage: 87,000. The heater is not blowing hot air. I have already replaced the heater core, the thermostat, and the anti-freeze. I have even checked the cable that activates the door that is supposed to allow hot air into the ductwork. Am I missing something? Any other possibilities? I don't mind the cold it's just hard to see out the windows when it snows and ice's. The A/C works just fine! Let me know what you think!

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2CarPros-Archives
February 17, 2011.



The heater control valve may be stuck closed. Also, check vacuum source to valve

Tiny
2CarPros-Archives
Feb 17, 2011.
No heat control valve in this one, it's an electrcally operated temperture blend door inside the plenum, scan for codes with a tool that reads "B" codes. If both heater hoses are hot, the blend door is the problem.

Merlin2021
Feb 17, 2011.
Can't scan the system for codes on vehicles this old, you will need to do what Merlin says but the blend door motor is a known problem. But is not a shade tree job

Tiny
Mjr346
Feb 18, 2011.
2000 models can be scanned

Merlin2021
Feb 18, 2011.