Hey all,

my heater is having some issue's in my truck heating. I'll have it idling in the morning, turn on the heater and nothing. So i start driving a couple of mile and it'll kick on, but when it's on high it blows like it's on low so i think it might have something to do with the fan, i don't know where the fan is either.

Any help is appreciated.

Garrett

 

The fan is on the heater box in the engine compartment on the firewall passenger side.

 

-pull the motor and see if it spins freely. replace if too much friction.
-hook it up to a battery to see if you get full speed
-if the motor works good on the battery then check the resistor pack
in the hvac box behind the glovebox (glovebox door removes easily for access)

 

ok thanks guys i'll check the motor and see, i'll also check the resister pack.

 

well i put all new switchs in my heater box and i know there working better than the old ones, but it still won't blow heat untill i'm on the road driving, i'm pretty sure it is the motor.

 

well yet again i was wrong, i put a new motor in and still nothin. Does anyone have pics of their resister pac so i know wher eit is and what it looks like.

 

When you mean "blow heat", do you mean:

1) No matter the position of the damper selection (ie, A/C, Heat, Defrost, Vent), there is nothing blowing
2)It blows out air but cold air until moving
3) It uses the defrost but then switches to the bottom vents for "heat"

 

well its basically none of those. It'll change the temp went changing the damper position, but the switch for the speed, i replaced it, but it doesn't matter what i set it to hi or low it stays at about medium to low tempurature. Everything else works, when i put it from defrost to vent it will change, but it won't blow until i start going and it stays at about medium to low as i already stated.