All Trucks, Campers, Trailers, RV's and Motor Homes - 1999 F150 Heater Core

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JustforMe
10-08-09, 10:30 AM
I need some instructions for changing the heater core in my 1999 F150.The windows fog up, pouring sealant in hasn't helped and the weather is now where I would like some heat. I can't seem to find a wet spot inside the truck cab though. Could it be the blend door or a hose and not the core? All suggestions welcome. Thanks in advance.:coffee:

newtofta
10-08-09, 11:31 AM
the coolant leaks out through the a/c condensation drain.
if he wind shield fogs up & smells sorta stale,most likely a heater core.
NO EASY task.
dash has to come almost all the way out of the truck,to acess the plenum assy.
JustforMe
10-09-09, 12:00 PM
Well I got to the heater core now I can't figure out how to disconnect the hoses from the air conditioner. I have tried searching this site as well as others and had printed off instructions for 97 F150. My problem last night was a single screw on the driver's side. Help, please.

newtofta
10-09-09, 12:40 PM
i just replied to the other post
hopkinsr2
10-10-09, 08:43 PM
STOP,,STOP,, If you are trying to disconnect the A/C hoses,,, Take it to a pro with the special disconnect tools as you may be blinded by rapidly excaping refrigerent!!!! Roger