On this website you find fuse box diagram and description for Hummer H3 (2006 - 2007)
Hummer H3 2005 2006 fuse box diagram Auto Genius
SOURCE: 2006 H3 Hummer AC/Heater Fan Motor
I brought my 2006 H3 in to the dealer for the same thing. My blower stopped working all together but it started as an intermittent problem. He said he had to replaced a diode or resistor either behind the switch on the dash that controls the fan or on the fan motor itself. Have not had a problem since but that was only about 4 months ago.
SOURCE: how do i reset oil change ligth on 2006 hummer h3
To reset your maintenance reminder system (even if the light hasn’t come on yet), you’ll need to turn your key to on (but don’t start!) and make sure your odometer is on TRIP A. Then key off. Press and hold the Odometer/Trip button. While holding down on the button, key the ignition to on (Don’t start the engine!) The display panel will count down from “------“ to “-“Continue pressing the button until the Trip A is displayed. After this step, you are done.
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SOURCE: 2006 Hummer H3 a/c & heater fan/blower failed
Probably too late now, I am sure you have already fixed it, but mine did this and it was an electrical part that is mounted right beside the blower fan. The part was OK, but the plug into the part was arcing and burned out the connection. A Chevy mechanic told me this has been happening to MANY Chevy products. I had to buy a new part and plug assembly with new wires, about 100 dollars, and I spliced them together. It was an Easy fix, but I shouldn't have had to do it :(
SOURCE: 2006 hummer h3 has a leak on passenger side under
My 06 was leaking during rain also. It turned out to be the sunroof. There are two drain tubes in the front of the sunroof that run the water down the corners to the ground and two drain tubes that drain water out the back corners. The water would seep around the glass, which is expected, but both of the tubes on the front of mine were plugged, and the water would overflow behind the dash and fill my floorboards. If my H3 was leaning to the left during a storm then the drivers side would be full of water. If leaning right, then the passenger side. I had to open sunroof and blow compressed air into the drain holes to clear them, but be careful, too much air will separate tubes from sunroof and then you will have to remove the inside paneling around sunroof to get to tubes and reconnect. You may only have one side plugged. you can test it by opening sunroof and pour a little water in the small catch pan in the front of the sunroof and see if it drains as expected (to the ground under the firewall on left AND right side). You can see the holes in each corner of catch pan to drain the water. Plug one with your finger, then the other to find the plugged side. Good luck!! Hope this helps!!
SOURCE: (06 Hummer H3) Blower not working, Clutch Keeps blowing fuse.
I assume you've fixed this already given that nearly a year has passer by, but if others experience this, it may help them. Under the dashboard on the passenger side there is a Fan Blower resistor attached to a red connector with 5-7 colored wires. Its held in by two simple screws. Disconnect the connector and inspect it for any burn marks(usually the last orange wire at the end). If this is discolored go to the nearest GM dealer and by about $70 worth of parts. The blower resistor, the red harness connector and the clips that go into the connector. Job takes under an hour and would be rated at novice-intermediate. Advice: set the passenger chair back as far as possible. Remove the harness clips carefully so as not to break them. For more workspace you can easily pull out the plastic facia on the right hand side, it easily slips out from under the foot rail, do not be intimidated there are no hidden screws. There is also a relay down there; a small black box held in by one screw, you might as well change this while you're down there. A dealer may charge as much as $400 for this simple fix!
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