it is starting to get really cold here, so i would like to get my heater to work properly. right now, it wont switch speeds. it only stays on the lowest one. i have replaced the actual fan, and the heater control switch. so far, no luck. what should i do, when it rains its hard to see cuz the defroster doesnt work properly.

thanks

daniel

 

There is a set of blower resistors mounted on the top of the heater box in the engine compartment.

You will see about 5 or so wires going to a plug that is held into the heater box with 2 9/32 bolts.

Remove this and look at the coils. If any are broken, there is your problem.

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ASE Mechanic/Machinist/Smog Tech

1999 NBM Trans Am
1986 Chevy 3/4 ton pick up
1981 corvette
1995 Kawi ZX6R

R.I.P. #3
My favorite quote about D.E. "He can see air"

 

I have gad this problem as well. One of my buddies pointed out that my vacuum hoses were routed wrong under my hood. There are vacuum hoses that help to control the blower for you car. Check those out as well.

Good luck!

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1984 Trans Am Coupe
700-R4 Tranny
Mods:
K&N
Rebuilt carb
Rebuilt heads
3" Mandrel Exhaust
Hooker Headers
Lunati Cam
1" Lowering Springs
Clarion CD
Kicker Speakers
2 MTX 4000
Pearl White Paint

"Live It To The Last"

 

The vac. hoses don't control the blower speed, they just control where the air come out of.

------------------
ASE Mechanic/Machinist/Smog Tech

1999 NBM Trans Am
1986 Chevy 3/4 ton pick up
1981 corvette
1995 Kawi ZX6R

R.I.P. #3
My favorite quote about D.E. "He can see air"