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1999, F-250, 5.4 4X4

Tiny
RODVENT
  • MEMBER
  • 1999 FORD F-250
The heat is the only thing comming out of the vents. I did bypass the hoses and the air works fine. With them connected the heat is all that blows, compressor is working ok. :|
Thursday, September 20th, 2007 AT 3:29 PM

1 Reply

Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
What youre gonna need to do is free up the temp blend door, or replace the heat control valve, usually on a heater hose, it is supposed to shut down the water into the heater core...I don't see a valve for your truck but you can take a peek!


https://www.2carpros.com/forum/automotive_pictures/62217_Blenddoor250_1.jpg



https://www.2carpros.com/forum/automotive_pictures/62217_Blenddoor2502_1.jpg



https://www.2carpros.com/forum/automotive_pictures/62217_Blenddoor2503_1.jpg



https://www.2carpros.com/forum/automotive_pictures/62217_Wiring_Diagram_1.jpg



https://www.2carpros.com/forum/automotive_pictures/62217_30961_mitchell_2_29.jpg


Check that there is not a vacuum leak or bad door servo! Operate control and watch door, if it is pulling but not moving, grease it! if air leaks out of the servo, replace servo!
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Thursday, September 20th, 2007 AT 3:58 PM

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