ugh good old fords..i wanna kill mine its a 93 f150, non-ac ,straight 6...has no heat....well barely warm....changed t-stat twice, flushed heater core +hoses twice, even took off the glove box and made sure the cable and linkage for the blend door is working....still nada heat....i can feel both heater hoses they ar ehot,but no heat inside...even the bottm of the heater case feels hot,but just barely warm air out of the vents.....anybody have this problem??? mabye the blend door is worn out or something where i cant see???? i dunno beats me...all i know is im sick of freezing every motrning here in northern il... even the cardboard in front of the radiator made no difference... D'OH help!!!

 

do you smell a weird odor? or are your windows fogging up with a oily film?

If those are happening then you got yourself a bad heater core & it will need changing.

 

no dude,dont smeel coolant, windows are clean, no coolant on the floor....i work on cars all day long im just wanting to see if anybody else has has the same problem... im pretty sure it sin the dash itself but i dont wanna tear it apart of theres another fix...it is a ol beast i dont wanna rebuild the thing if i dont have to... mike

 

try rversing the heater hoses at the heater box .

 

hmm ok ill try it tommorow...one of em has a bypass to the radiator..i thought aboui tmabye blocking that off too and see what hapens... but ill try and see
mike

 

I had the same problem on my 94, new heater core, hoses and t.stat and still no heat. Turns out a pen fell down the defroster vent on the top of the dash and was blocking the door in the heater box - thus cold air only. Off with the glove box, out with the heater core, stuck my hand in the heater core cavity and pulled out all old Bic pen. Hope this helps.

 

How this does not sound too stupid..... My first teruck was a 79 yota went all winter without heat until in the spring i realized that the heater control was not moving the rod to switch the heat on. Have you checked the cables on the controls?

Chris

 

OOps just re read your post you checked that sorry

 

I had low to no heat in a 89 bronco. When that heater core went bad when I replaced it I now have great heat again. That bad core didn't leak or smell just didn't work for ****.

 

I had the same problem in my 89, turned out that the radiator wasnt full enough of coolant,filled er up and had heat. Hugh

 

my 90 done this no heat at all , turns out core was stopped ,flushed it and all was good. but I guess you already checked that , mine is hot enough now to burn you if you wanna hold your hand in front of it. sounds like a blend issue of you are not getting heat but the heater core is warm , door must not be sealing.

 

hmm...this thing could have something stuck dowen the vent for akll i know....switched the hoses,not good heat, blocked off that by=pass tube to the radiator and that helped some...i guess i just need to tak emt lazy *** out to the garage and tea rit apart and see whats going on....thanks for the posts!! and: yes i checked the cable, and NO,this trucjk does not have the vacum operated or cable operated coolant control valve(non ac truck) so thasts out of the question.....ill keep at it and let you guys know

 

Could be something real simple. The temp dial uses a little plastic thread to regulate hot and cold. That plastic piece is connected to a small cable which opens and closes the vent door, I believe. Pull out your box in the dash and see if it's broke. It might have broke and is just stuck on cold. This happened in my 93 F-150.

 

I had the same problem with my 92 F-150. Heater hoses were hot, but no heat. Turned out I had some serious blockage in my radiator, even after flushing. I had some tranny fluid leaking into my cooling system. Replaced radiator since it was the source of the problem, then the thermo, and heater core, because there could have possibly been some blockage there as well from the pretty reddish concoction flowing through it. That fixed the problem for me!

But, as suggensted in some of the other replies, your problem might be behind the dash....the mechanism behind the console controls are pretty fragile...a plastic connector might have snapped, or a cable or little push rod might have slipped off or broke.

Good luck!

Bryan

 

i can see the cable,and the arm that the cable hooks onto...it then pivots on another arm...all that i can see moves and works like it should...guess i just need to pull the dash apart...
mike