Heater fan only works on highest level?

[Paytonz71]

Just what title says. the fan for the heater and the air only works on the highest level. can anyone help me with this problem? thank you in advance!

 

[FastOrange]

Most likely the resistor. sorta a pain to change.

 

[Paytonz71]

How do I change that?

 

[95Escahoe]

Replaced mine on my Tahoe, what a nightmare lol, its on top of the HVAC box behind the glove box, its easy to get out a pain to get in but the hard part was getting the screws back in the holes I got big hands got it just is not one of the easier things to do

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[FastOrange]

How do I change that?

What year truck?

it is on top of the heater box, you will have to remove the glove box, 88-94 is abit different then a 95-98.

 

[98_k1500]

Mine is doing this, but its my blower switch. If you jiggle it just right, you can get it to come on different speeds. That being said, the resistor is a much more likely culprit

 

[IOWNJUNK]

Mine is doing this, but its my blower switch. If you jiggle it just right, you can get it to come on different speeds. That being said, the resistor is a much more likely culprit

Priced a new one? It'll make you cry!

 

[someotherguy]

Priced a new one? It'll make you cry!

Switch alone for 95-up is only like $15-$20 depending on where you buy; can be easily replaced rather than replacing the entire control head. Now if the wiring pigtail up to it is burnt, that price will make you cry, especially just for a plug with some wires coming out of it. $45-$75 depending on where you buy.

But yeah, agreed with others, the usual suspect is the resistor. Problem is, the blown resistor is often caused by a blower motor that is going bad and drawing too much current. If the new resistor blows again in a short while, next time replace the resistor, blower motor, AND check all connections in the system.

Richard

 

[98_k1500]

Thats why im still jiggling it lol. As long as that works, im not buying a new one.

 

[IOWNJUNK]

I was gonna order one from LMC but they want $220 for the whole assembly. I don't want to buy one from a junkyard either.