No Heat...hope it's it not a major job!

[Fordzilla80]

Ha, I've pulled the dash out of my F100 4 times. Easy as cake.

If I ever have a 97+ truck and lose heat, blanket city it is. No way will I ever embark on something so involved just to do something so simple.

 

[blacksnapon]

Ha, I've pulled the dash out of my F100 4 times. Easy as cake.

If I ever have a 97+ truck and lose heat, blanket city it is. No way will I ever embark on something so involved just to do something so simple.

Yep, 97 up trucks, I can have them down in a couple of hours, easy as cake!

 

[weilertool]

pulled the dash...all flappers are workin fine....heater core not leaking...replaced the thermostat, just to eliminate it as a problem. coolant level was a little low to begin with...after pulling hose to remove thermostat, lost about 1 gallon. Filled tank with 1 gallon of coolant...ran truck...tank still over full line...but I know the level is still low.

How do I purge all the air out of the system...oh, and by the way...still blowing cold air....UGH!!!

 

[lil_dq]

What about the actual controls themselves? Could the regulator on the switch have gone out, therefor not telling the motor to switch to heat?

 

[weilertool]

Thought that too...but all the flappers are working with the controllers...I'm either thinking...air pocket in the system....or restricted heater core...but this heater core is only a year and a half old..

 

[lil_dq]

Yeah but if your lines and rad had crap in them it would pass right into the new core.

Damn man I am at a loss and I tear these trucks down on a regular basis! LOL not my choice....OK maybe a little by choice....

 

[smokey]

Have you tried flushing the heater core to see if it flows. It could be plugged. Pull the hoses and run some water through it to be sure.

 

[weilertool]

Was gonna try that next....one of my buddies said about back flushing?? Is that ok to do with a heater core? Do I hook up in the engine compartment? Thanks everyone for all ur help!!

 

[smokey]

Yes it is fine to back flush the core. Just undo both hoses going to the core. I always unhook the hoses from where they attach to the engine. Then put one end in a bucket to catch the water while flushing. then swap ends and do it again till the water us clear with a good flow.

 

[weilertool]

Ok, thanks for the help bud, I appreciate it.