1992 idi wont warm up

[Articcatzl440]

I have a 1992 f250 and it wont warm up. it will runa an drive but i cant get the temp gauge to move also i have no heat. i reaplaced the thermostat, but still nothing on the temp gauge or heat in the cab.

[TurboDiesel94]

What tstat did you replace it with?

[Jarrod B]

^^^^

and still nothing, replace it again to make sure the new one isnt sticking open.

and you did install the new tstat the same way the old one was?

ive had new tstats fail instantly b4.

[redneckgearhead]

Does your truck have a clutch fan? Ive had the clutch go bad causing the fan to stay engaged all the time. That might do it.

[ccoyle]

Originally Posted by redneckgearhead

Does your truck have a clutch fan? Ive had the clutch go bad causing the fan to stay engaged all the time. That might do it.

Thats what happened to mine. It stays engaged and is constantly working. Have the new clutch, just gotta put it on.

[catlinB]

i just had this same problem, and changed 3 thermostats and changed the heater core and still had no heat but one heater core hose would get warm and the other one wouldnt. it turned out to just be the radiator cap..... it was old and wasnt letting the sysytem pressureize so Ford told me, anyways i bout a new cap $15 bucks at Ford. and had heat within 10 mins of leaving the parking lot, its a cheap try , i wouldn of thought the cap would of made a difference