I just bought this hummer a month ago. its a 2004 H2, i have no control over fan speed or anything. also it stays on when i turn off the vehicle. Please help, thanks in advance

 

My blower does the exact same thing unless I remove the 40 amp fuse in the engine compartment. Have you found a solution? It's getting cold in North Idaho right about now.

 

-forgot to mention, and not sure if it matters, but I do have fan speed control.

 

Anything else staying on, interior lights, dash idiot lights, radio? Does it quit after about a ten minute delay, or run till the battery dies?

 

Hey all,
Its a common problem, not that it goes out alot - just mean it happens and its an easy fix.

Fan Blower Resistor aka Fan Blower Motor Control Module (PN 89023355)
Its on the right side under the glove box

Its like 3 screws (I think), and unplug and swap
Done.

Hope this helps

 

Thank you for that. It is very much appreciated

 

@mikeb686 it just happened to me, 6-28-23 , turned engine off, a/c going full bore, thank goodness i saw your post for at least a temporary fix, i found the fuse under the hood, pulled it and now its ALL off, but from what i am seeing here looks like i need the blower motor control module, dang it,

 

@jsbihn it just happened to me, shut engine off and a/c was blowing full bore, anyways hopped on here seeing that it must be the blower moror module,? resistor? while driving home i swung by o'reilly parts store, he said they couldnt even get those parts, but i was able to find the HVAC fuse under the hood, pulled it for temp fix, do i have to order these parts from GM only? and Lord i hope its true that its a easy fix,,,, also got the blend doors or something else screwed up because air only blows thru defroster, not thru vents or to the floor, whata mess,