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Heater fan not working correctly?

Tiny
WEENGO
  • MEMBER
  • 1 POST
  • 2006 HUMMER H3
Heater problem
2006 Hummer H3 Four Wheel Drive Automatic 45000 miles

my heater blower suddenly does not come on
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Tuesday, August 11th, 2020 AT 4:55 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check blower motor fuse no.82 30amp, HVAC relay no.87 and the fuse built into the blower motor resistor.
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Tuesday, August 11th, 2020 AT 4:55 PM (Merged)
Tiny
FACTORYJACK
  • MECHANIC
  • 4,159 POSTS
Disconnect the blower resistor and check for charred terminal on pin F(ORN wire). If it is charred, you need to replace the connector body, terminal, and resistor. The resistor is under the rh side of dash, has a red flat 5-6 pin connector.
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Tuesday, August 11th, 2020 AT 4:55 PM (Merged)
Tiny
PACKHOUSE
  • MEMBER
  • 1 POST
  • 2006 HUMMER H3
  • 6 CYL
  • AWD
  • AUTOMATIC
  • 50,000 MILES
There's a sensor inside the housing of the blower fan under the dash. It went bad, so I replaced it. When I pulled it out the mateing connectors had melted. Why isn't this line fused properly? Is there a recall? Now it has gone bad again 6 months later.

Thanks,
Kevin
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Tuesday, August 11th, 2020 AT 4:55 PM (Merged)
Tiny
FACTORYJACK
  • MECHANIC
  • 4,159 POSTS
It melts because of the high resistance at the poor connection. Ideally the terminal should have been replaced. It is surprising, with the number of these seen, it has not had a service bulletin. You can either get a patch harness with leads, that replaces the connector using crimp and seal connectors, you can get an HVAC extension harness, or you can get the red connector body, lock, and a new terminal to crimp on the wire.
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Tuesday, August 11th, 2020 AT 4:55 PM (Merged)
Tiny
PERKUSMC2171
  • MEMBER
  • 2 POSTS
  • 2006 HUMMER H3
Air Conditioning problem
2006 Hummer H3 All Wheel Drive Automatic 71000 miles

When I turn on the climate control in the vehicle, nothing is coming out of the vents. The fan in the engine compartment is working, but nothing is coing out of the vents. I have checked relays and fuses but still have not ascertained a fix. Any suggestions?
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Tuesday, August 11th, 2020 AT 4:55 PM (Merged)
Tiny
FACTORYJACK
  • MECHANIC
  • 4,159 POSTS
The blower fan is not in the engine compartment, the blower is under the passenger side of the dash. If it is not operating, I would pull the red connector from the resistor and inspect. The quite possibly is some obvious heat damage from a poor connection. Repair involves replacement of the resistor, connector body and terminal. Or, there is a harness available that encompasses that connector as well as others. It would be through GM.
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Tuesday, August 11th, 2020 AT 4:55 PM (Merged)

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