Fan Not Blowing Like It Used To?

[Yukon]

Does anyone know why my heater/ac blower isn't blowing as hard as it used to? I have full control of tempature and speed, so i don't think it's the controls. anybody have any ideas.. there's no cabin air filter to replace, nothing that i can think of that would be dirty and restricting it...

please someone give me an idea.. or even a mod to upgrade...

 

[bowtiefreak]

The resistor is bad. Just went through the same thing. Cheap part, I hope you have little hands to get at it. I think there might be a thread in the tech info section on the swap.

 

[Yukon]

i thought the resistor was just for the high function... so it has affect on all speeds??

 

[SunlitComet]

Actually the resistor is what creates the lower voltage for slower speeds. Hi is just a direct voltage feed.

 

[retorq]

I have a GF like that!! Can I replace her resistor?? LOL

 

[puckhead]

I have a GF like that!! Can I replace her resistor?? LOL

hahaha! Damn you, almost spilled my drink laughing lol

 

[brooks93]

pull your blower motor and look at the A/C Evaporator Core. Mine was doing the same thing in my 96 hoe and the evaporator was 70 to 80% blocked with crap. (dog hair, carpet fibers, dust and leafs. I replaced it (tear out the whole dash. not fun) and it moves alot of air now

 

[carcrz]

sounds like my G.F. not blowing like it used too......LOL

 

[Yukon]

so it's not my resistor it's my condensor clogged? would that affect both heat and cool?

 

[SunlitComet]

No, the condenser is in front of the radiator. I think you mean your eveporator and it should be next inline downstream of the blower. If I read the part layout correctly that would cuase problems on both and I think your blower drops down. Can you get a small mirror to get a look at the evaporator?

 

[Yukon]

yea that's what i meant... i just replaced my heater core last week... didn't even think about pulling the blower motor and looking in there.. is there a tech article on blower motor removal?

 

[SunlitComet]

I do not have details on your year but any manual would, somebody here might, or you could subscribe to alldatadiy.com.

It carries all the factory stuff.

On mine you just disconnect wiring and unscrew the assy..

 

[brooks93]

sunlitecomet is correct. the blower sucks in the air and then blows it through the evaporator then through the heater core to your vents.

removing the motor is not to hard.

drop you glove box.
pull off rubber sound deading cover.
I think its 5 screws that hold the motor in. Take those out and the blower will pull out.

 

[SunlitComet]

drop you glove box.
pull off rubber sound deading cover.
I think its 5 screws that hold the motor in. Take those out and the blower will pull out.

Sorry, I thought his was a 2005 and it drops from the bottom.

 

[brooks93]

oh he might be. i figured it was a older tahoe since it was in this part of the forum

 

[SunlitComet]

Yeah. I have seen some crossovers. I was was just using info in his sig line.

I encourage any body hear to use their signature line option to include vehicle info.

I think it benifit everyone.

More initial info to work with.

 

[Yukon]

sorry updated my sig... lol... yea it's a 1997 truck.. i pulled the blower motor and the evaporator wasn't clogged at all... i pulled on leaf and some string out of it.. i'm lost... hooked my blower up outside of housing and it blows hard!! almost twisted out of my hand...

anybody else have a clue?

my diverters are working good... recirc door is working...

 

[SunlitComet]

I thought my data had an open unit picture. As soon I find it I will post.