heater fan not working correctly?

The blower resistor is on the bottom of the blower-Check all the HVAC fuses, HVAC relay,High speed blower relay and blower switch- Here is the blower motor, compressor and HVAC wiring below so you can see how the system works. This guide will help us as well

https://www.2carpros.com/articles/blower-fan-motor-works-on-high-speed-only

Check out the diagrams (Below). Please run this test and get back to us.

You will find a melted terminal and possible connector body at the blower resistor. A poor connection creates resistance, and resistance creates heat. Ideally, you will either need to obtain a harness with leads, or a terminal and connector body to perform a wire repair. More than likely, you will need the resistor also.

Replaced the resistor but AC/heat still not working. could it be the blower?

When you turn the AC/heater on does anything happen? Do you have any air flow? If not then yes, it could be the blower motor. We need to test for voltage at the motor and see if you have voltage when the switch is on.

I attached the test for the blower motor but again, I think the first thing is to just check for voltage because if it is there then the motor is most likely failed.

blower fan doesn't work 1-4, how do I check blower resistor, how do I get to blower motor? could it be the control switch? I have checked all havac fuses ,relays. they all seam to be ok..does getting to blower require taking dash apart ?

check to see if resistor is getting power from switch just probe any the wires as you move the switch. then probe blower to se eif it's getting power if not it's probably the resistor pic included.

you'll have to remove some panels to get tot eh resistor on passenger side they will either have push pins or small screws holding them in place.

2007 Hummer H3

My blower went out on my air conditioner as I was driving. How do I repair the blower, the fuse is still good.

Pull the connection at the resistor, if you can get it apart. Often times a poor connection results in a thermal failure. Replace the resistor and connector. It is available as a harness, makes it easier.

my blower motor has stopped blowing. I have checked the fuses and found none to be blown. What do you think could be wrong?

Pull the connector from the blower resistor, under the rh dash, near the blower motor. It is a red connector body, 5 or 6 pin configuration. Check the power supply terminal, you will probably notice the heat damage to be obvious. Replace the terminal and resistor, it is usually caused by high resistance from the poor connection. You will need another terminal body as well. I don't know for sure if a harness connector with leads is available, then you would just splice it in with provided crimp and seal butt connectors.

When I connected the blower to the battery it worked fine. After several more test I think I lost the ground. I momentarily grounded the one terminal on the fan harness and the fan started to run. What would you recommend to repair this?

Pull the connection at the resistor. If it is burned, replace the resistor and conenctor/terminal. There is also a harness available with that connector, it is a bit more in price, but is plug and play.

The fan blower in my son's H3 stopped working, all fuses are still good. Any suggestions where I can find teh problem?

Power the brown wire at the blower motor from the battery and see if it comes on if so do below

Check and test the HVAC relay, High speed blower motor relay, blower motor resistor, BCM and HVAC control module-This one can be tough to deal with best bring it in.

Air Conditioning problem
2006 Hummer H3 6 cyl Four Wheel Drive Automatic

My Blower Motor is not working. What can be some possible problems?

I have the same situation. The blower is working, but no air is coming through the vents in the vehicles driver compartment

For jbl0509, check the connector at the blower resistor. Poor conection usually causes a thermal failure, you will see the signs when you get it disconnected. The resistor, and terminal will need replaced. Optionally, there is a harness available through GM that includes that connector.

For perkusmc2171, is there air coming from other than the dash vents, like the floor or defrost vents?

heater blower is out, how to repair

Check the red connector body down at the resistor for signs of overheat. You will need to replace the connector body, resistor and terminal. You can also get a harness for that circuit that is not too expensive. It is just plug and play, after you remove the glove box and such to access all the connections.

Heater problem
2006 Hummer H3 Four Wheel Drive Automatic 45000 miles

my heater blower suddenly does not come on

Check blower motor fuse no.82 30amp, HVAC relay no.87 and the fuse built into the blower motor resistor.

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.

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

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.

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?

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.