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96f350 no heat

2K views 19 replies 6 participants last post by  onequicktang 
#1 ·
The heats not working, blows out nothing but cold air. The temp gauge reads warm, but the upper rad hose stays cold. Im thinking t-stat, what do you guys think?
 
#5 ·
My guess would be Thermostat....be careful taking bolts out and tightening them...steel bolts in aluminum is a disaster waiting to happen...i broke a bolt off tightening it and it was not pretty....
 
#7 ·
Hmmm..My buddy has the same problem in his jeep and the dealer said it was his Vents as odd as that sounds....Im not sure how it could be the Vents in your truck but maybe someone on the forum here can go off this?? have you tried calling Ford? Also I had a F-150 where the Actual Dial that controls the heat broke and wouldnt turn the prong on the Controller...try pulling off the dial and seeing if its turning.. might have to use pliers to turn it...sometimes the dials will crack just a little bit and it will slip off and not turn the heat dial...even tho it feels like is turning it...just a couple thoughts...
 
#8 ·
if the temperature selector flap is working and the heater hoses are warm, id look into replaceing the heater core
 
#11 ·
I remember on a Ford Chassis Motorhome with the electric heater Valve, I just opened the valve manual and disconnect it. It was a V10 gas 2001 Chassis.

If the inlet and outlet hose is warm and no hot air comes out, the flaps are not opening to let cold air in, recirculating the air or not letting warm air out thru the windshields, center, and foot area.

I don’t know if yours work manual or electric, but this is where I would start checking.

Mr.JAJA
 
#16 ·
It looks like all Flaps are vacuum operated. In the motor compartment, right (passengerside) side is a Vacuum cup with hose, just under the windsheeld. This looks to me is the outside inlet. Try to disconnect it and swing it over. I am not sure if this will fix the problem.
Good luck.

Mr.JAJA
 
#18 ·
Mine just had the same trouble. Mine ended up being the blend door, it moved but there was a pen stuck in it so it did not close tight and would blow cold. took me a while to feel it up there double check theres nothing stuck in there
 
#19 ·
onequicktang,
Can you give me a quick brief on how you pulled the heater core in yours? Did you have to pull the dash at all? I'm about to do one myself but really have no idea how lol.
thanks again,
matt z
 
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