Why does the Chevy Avalanche blower keep blowing?

The auto climate control fan speed is controlled via PWM with a solid-state driver. Completely different system, and different issue. I am running into a similar issue. 2003 Avalanche, fan keeps blowing even after engine is off, fan turns on and off intermittently. Dual climate control.

What causes a Chevy blower motor to overheat?

Either of the above may cause the relay resistor module or wiring connector to overheat, resulting in one or more of the following symptoms: In very rare events, if the above symptoms are ignored, a fire could occur.

Why is my car AC not blowing cold air?

Therefore, it is possible that your car is low on refrigerant that is preventing your air conditioning from working properly. This is the most common reason for why your car’s AC is not blowing cold air.

How long does a Chevy blower motor stay on?

In very rare events, if the above symptoms are ignored, a fire could occur. This special coverage covers the condition described above for a period of 10 years or 240,000 km, whichever occurs first, from the date the vehicle was originally placed in service, regardless of ownership.

Why does my Chevy Silverado blow hot air?

Cold is cold, hot is hot on both sides. Just something to try, your results may vary. It is a 2000 and has a manual heater with only one zone. I suppose it is the actuator on the top of the heater box isn’t it??

How can I repair my Chevy Duramax blower motor?

A copy of this letter will be attached to the dealer message announcing this bulletin. In the meantime, if a customer brings their vehicle to the dealership with the condition described in this bulletin, repair the vehicle using the parts called out in this bulletin.

Why does my GM front blower not shut off?

GM has issued a technical service bulletin (TSB) #06-01-39-002B to address problems with the front blower motor. In some cases in cold weather the blower motor may not run, or if it does, it may not shut off when you turn off the vehicle. The TSB applies to the following vehicles with automatic temperature control:

Where is the heater fan blower motor relay located?

Automotive Mechanic 25 years of experience Hello – the blower fan relay is located behind the glove box – small black plastic square. Make sure both fuses for the HVAC/heater are good, and have power to them (one is 10 amp, one is 30 amp).

Why does my blower motor keep running high?

More than likely you have a control processor issue, which is basically the resistor. The HVAC control module is to send the speed control signal to the processor which then changes the fan speed. When this shorts it usually puts the fan to high speed.

Why is my blower not working on my Chevy Silverado?

Another common problem will be the blower motor will stick in the ON position and never shut off. You can access the resistor module behind the fuse box located on the driver’s side lower dash compartment. You must visually inspect the resistor, and make sure it isn’t melted or burnt. If it is, then replace it.

Where is the harness on a Chevy Colorado blower?

This harness is located in the passenger kick panel. Pull the door sill panel, pull the kick panel cover, and it is right there. Test the voltage of the brown wire at both sides with the motor switch on 4 and see if you have 12v on both sides.

What to do when your 05 Colorado fan stops working?

Pull the plastic off of that area in front of the door under the glove box. My harness, along with others have had the wires for the blower melted. Cut it out of both sides, attach a new piece of wire as a jumper, and re connect the harness. My 05 Colorado fan just stopped working the other day.

What kind of HVAC does Chevy Avalanche have?

Claims with repair orders prior to April 8, 2011 must be submitted to the Service Contract provider. Involved are certain 2003-2006 model year Chevrolet Avalanche, Suburban, Tahoe; GMC Yukon, Yukon XL; and 2003-2007 model year Chevrolet Silverado and GMC Sierra vehicles equipped with a manual HVAC (CJ3) or heavy duty heater (C42).

Why is my AC not working in my Avalanche?

One or more heater & AC (HVAC) air delivery and/or temperature mode door actuator may fail. This can result in incorrect air delivery or temperature. If this occurs, fault code (s) stored in the HVAC control module should be available to assist with diagnoses.

Which is GMC Sierra blower is not fully functional?

#10240: Special Coverage Adjustment-Heating, Ventilation, and Air Conditioning Blower Not Fully Functional or Inoperative – (May 9, 2011) Subject: 10240 – Special Coverage Adjustment – Heating, Ventilation, and Air Conditioning Blower Not Fully Functional or Inoperative

Why is my Chevy Avalanche heater not working?

Learn if it’s a simple fix or time to seek out a trusted technician. Not your vehicle? Why Isn’t My Heater Working? What are common reasons my Chevrolet Avalanche has heater problems?

What happens when the blower fails on a Chevy Equinox?

When the blower motor fails, the air conditioner and heater may still work, and heat or cool may be felt at the vents, but the air pressure will be dramatically decreased. This Read More When the heater control valve fails, adjusting the temperature may not change the air temperature at the vents, whether hot or cold.

Why does the blower motor stay on all the time?

So fired up the truck and the HVAC unit was working fine set the temp and the fan speed that all works fine, but turn the key off the blower motor should quit right?? No not with this one stays on till I pull the 40amp fuse.. ??? You are going to need to inspect the wiring connector at the resistor and blower motor.

Is there recall on GMC Duramax blower motor?

You need to find a different dealer then, it is covered as long as you don’t have over 150K miles on your truck, the recall runs from 2003-to 2007 Classic body trucks. Check somewhere else, somewhere that actually knows whats going on…

Why does my GMC blower motor keep running?

While driving today blower motor Kicked out, I turned up the fan speed and it kicked back in. Got to my destination, turned off the key and the blower kept running. Took my climate controls out and the fan continued to work, ended up pulling the 40amp fuse in the engine bay to shut it off so I don’t kill my battery.

Why does my blower motor keep running after I shut off the car?

Some customers may comment that the blower motor is inoperative or continues to run after the vehicle has been shut off. These conditions may be caused by a blower motor control module failure. This failure may occur when the vehicle is operated in ambient temperature conditions of -23 C (-10 F) or below.

When to replace the fuse on a Chevy Avalanche?

Just pick some feature of your vehicle that you can get along without – like the radio or cigarette lighter – and use its fuse if it is the correct amperage. Replace it as soon as you can. Before replacing a fuse check that the key has been removed from the ignition and that all the services are switched off and/or disengaged.