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Hvac blower issues wtf

A

Albrechtk

Member
Messages
17
Location
Pimckney, Michigan
A month ago the blower in my 08' base model H3 stopped working. Since then, reading online forums, I have replaced pretty much everything having to do with the blower- including the blower itself. It still doesn't work. The only used part i bought was the climate control itself (due to cost) and I've purchased two of those. Not really wanting to pay a mechanic or a dealership to problem solve it. I live in Michigan, right now it's okay that the it doesn't work cause I can roll the windows down. Come fall and winter that isn't an option. Help please
 
rascole

rascole

Well-Known Member
Messages
2,587
Location
Bellflower, CA
Did you have the harness replaced under the recall? Have you tried the blower on a bench? Remove it and test it with 12V. If it runs it's more than likely the resistor harness gone bad.
 
alrock

alrock

El Diablo
Staff member
Messages
10,447
Location
Scottsdale
I think rascole has a good point in now it's taking a multimeter and/or power sources to components to see what's working. I assume you've done a reset of the HVAC system, which normally happens anyway when you disconnect a battery but it can also be done manually.

When you do this, does the blower work?
•Turn ON the ignition with the engine OFF.
•Turn the Temperature dial all the way to the right.
•Turn the blower control dial all the way to the right.
•Turn the mode position dial all the way to the left.
•Simultaneously press and hold the A/C and Defrost buttons until the LEDs start to flash
•Once the LEDs stop flashing, calibration is complete.
 
A

Albrechtk

Member
Messages
17
Location
Pimckney, Michigan
Tried manual reset, didn't work. Last time I checked I had 12v in new harness at resistor and relay, didn't actually check at blower because it's brand new. That's when I replaced relay. Guess I'll have to pull the blower and check it. Replaced relay because the same wires were energized whether the old one was connected or not.
 
0

08H3

Well-Known Member
Messages
1,315
Location
United States
Had no idea there even was an HVAC calibration. When would you ever need to do it and what is actually calibrated? Just curious.
 
alrock

alrock

El Diablo
Staff member
Messages
10,447
Location
Scottsdale
08H3 said:
Had no idea there even was an HVAC calibration. When would you ever need to do it and what is actually calibrated? Just curious.
Click to expand...
The most common times to do the calibration are if you replace the blend doors or the control unit. I've had to replace two blend doors. It moves the various blend doors open and closed as well as moving the blower motor through the various settings.
 
Lauren

Lauren

Well-Known Member
Messages
127
Location
English in Dubai, UAE
alrock said:
The most common times to do the calibration are if you replace the blend doors or the control unit. I've had to replace two blend doors. It moves the various blend doors open and closed as well as moving the blower motor through the various settings.
Click to expand...

I have this issue at the moment where my AC compressor is going a little crazy, probably needs replacing but most of the time when I push the button to make the air circulate within, it will just flash then never change, then it may randomly change after sometime when I've even forgotten that I pushed it!

So I thought this was to do with the Compressor going crazy but now that you mention it, I did remover the blower to clean it etc around 2 months ago.. is there a possibility that I could have interrupted the calibration so to speak?
Or is this completely separate? haha
 
Romeo

Romeo

Well-Known Member
Messages
166
Location
New York City
My HVAC went out last week, just received the resistor and wire harness. I need to find time to install it, thankfully the weather cooled down a bit where i am at and been great to drive with the windows and sunroof open.
 
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