Why does my Chevy Silverado blower not turn off?

This 2004 Chevrolet Silverado came in with the complaint that the blower motor will not turn off even with the key off. This is relatively common problem of the the full sized Chevrolet, GMC and Cadillac trucks with auto a/c controls. The first step is to lower the passenger side hush panel under the dash.

What should I do if my blower won’t shut off?

Refer to either the Blower Motor Control Processor Replacement or Blower Motor Processor Replacement-Auxiliary procedures in SI. After replacement of the blower motor control module, the customer may notice a slightly higher than expected blower motor speed at any of the blower speed settings.

Why does my blower motor keep running after I cut it off?

My blower motor is staying on even after I have cut the truck off and opened the door. helpful? 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.

When to replace the blower motor control module?

Important: Replace the blower motor control module if the vehicle experienced a blower motor control module failure in extremely cold ambient temperature conditions. Technicians are to replace the blower motor control module, also called the Linear Power Module (LPM), with the P/N listed below.

What to do if your Silverado blower won’t work?

Head under the hood and check the blower motor wiring to make sure it is getting power to it. If it is, then your only option is to remove the blower motor and have it tested or replaced. You can do so yourself if you have the equipment, or have it done at the dealership or parts store. Figure 3. Silverado blower motor and fan assembly.

Why does my car blower motor not shut off?

If you have a vehicle with climate control system and a variable speed blower motor and the blower motor won’t shut off and stays on HIGH with the car turned off and the key out, chances are the blower motor motor control processor is toast or the HVAC control module is damaged.

What to do if your climate controlled blower wont shut off?

If your climate controlled blower processor is shot, be prepared to spend mucho bucks for a replacement. But before you start throwing expensive parts at the problem, you’ll have to do some checking. Start by testing the gray/black wire at the blower motor control processor. First, try grounding the wire. Then try removing it.

Why does my Chevy Tahoe heater not shut off?

There’s not alot of room to work especially if you have big hands like me. Today is Sept 22 2014. CHEVY TAHOE 2005. HEATER BLOWER WON T STOP WHEN ENGINE SHUT OFF . WHEN ENGINE RUNNING NO CONTROL ON THE BLOWER SPEED .WORKED AT ABOUR 2/3 OF MAX SPEED . REPLACED MYSELF THE BLOWER RESISTOR .TOOK ME 2 HRS MAX .

Why does my GM car heater not shut off?

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: GM has identified the blower motor control module as the cause for the failure.

What should I do if my blower wont shut off?

If the blower stops with either of these steps, the problem is in the HVAC control module. However, if the blower continues to run at high speed with either of those tests, replace the blower motor control processor. Just as an FYI, the retail price of the blower motor control processor is $280.34.

What kind of car heater won’t stop running?

Heater fan won’t run, Heater fan won’t stop running – GM products, Ranier, Escalade, Avalanche, Silverado, Suburban, Tahoe, Sierra, Yukon, Envoy GM has issued a technical service bulletin (TSB) #06-01-39-002B to address problems with the front blower motor.

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:

Can a Silverado blower stay on with the key off?

The HVAC blower in this 2003 Silverado stays on speed 5 even with the key off. Here’s how to turn speed 5 of the blower off (while keeping speeds 1-4) and hopefully this will save you from replacing the battery. NOTE: GM issued a special coverage policy for this problem which covers the repair for 10 years or 150k miles, whichever comes first.

How to remove a resistor from a Chevy Impala?

Chevrolet Impala 06-16 Blower Motor & Resistor Removal – YouTube 06-16 Impala Blower Motor & Resistor RemovalDisclaimer:This video is not meant to be a definitive how to.Always consult a professional repair manual before s…

What causes a bad or failing blower motor relay?

Blown fuses. One of the first symptoms of a bad or failing AC blower motor relay is a blown AC blower motor relay circuit fuse. If the blower motor relay develops any sort of problem that hinders its ability to properly limit and distribute power, it may cause the blower motor fuse to blow. Any sort of electrical spikes or excessive current…

Can a blower fan only work on high speed?

Blower Motor Fan Only Works On High Speed? Plus – Tips To Prevent Repeat Failures! If playback doesn’t begin shortly, try restarting your device. Diagnostic training videos and content hosted by ASE Master and L1 Certified Technicians.

How to prevent repeat failures of blower motor fan?

Plus – Tips To Prevent Repeat Failures! If playback doesn’t begin shortly, try restarting your device. Diagnostic training videos and content hosted by ASE Master and L1 Certified Technicians. Our goal is to teach you ways to be quicker and more efficient in your diagnosis by implementing different techniques and tools.

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 to do if your Chevy blower motor relay blows out?

The blower motor relay on your Chevy vehicle is essential for the operation of the blower. If the relay is blown out, you will need to install a new one is soon as you can. Thankfully, it is fairly simple to tell if the relay is malfunctioning and to install a replacement.

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.

What kind of motor does GMC Z71 1500 have?

2005 GMC Z71 1500, W/ Dual digital climate controls. 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.

Why is my blower not working on speed 5?

If your blower is not working on speed 5 then the blow motor resistor (I think its called that) is burnt and you need a new one. It is a 5 minute fix.

Where is the relay on a blower motor?

It is a five terminal relay. Normally closed allows power from the relay pack to the blower motor, but when energized it switches to allow direct battery voltage to the motor for full speed operation. And I believe, but cannot be sure, the relay may be located near the resistor pack and that might be the clicking you hear.

What causes a blower motor to stop working?

In a situation where the motor doesn’t work on any speed, the most likely causes are: a blown power supply fuse, a bad motor ground connection, bad motor speed control module or a failed motor. On all systems, a failed blower motor is least likely. Blower motors generally don’t fail out of the clear blue.

What are the signs of a bad heater motor?

Common signs include the car’s heater not working or getting stuck on a certain speed, or something getting jammed in the blower motor. 1. Blower motor stuck on one speed 2. Blower motor does not work on certain settings 3. No air from the vehicle’s vents Average rating from 130,908 customers who received a Vehicle Engine Cooling Inspection.

What causes a blower motor to not work?

If the blower motor resistors’ internal components fail it may cause the blower motor to malfunction, or not function at all on one or more of the settings. This can also be caused by a blower motor switch, so a proper diagnosis is highly recommended if you are uncertain of what the issue may be.

What happens if you run a Chevy Silverado Hot?

The Chevrolet Silverado is a rugged truck that is made for a tough workload. Coolant system failure can eventually cause major engine damage as running the truck hot can lead to head gasket failure or loss of power eventually causing the motor to stop running.

Why is my AC not working on my Silverado?

When I turn on AC, both sides will blow cold for a few minutes and if I hit a small bump in the road, the driver’s side will turn to extremely hot heat and I have to turn off the engine to reset it and it goes back to cold air until I hit another bump in the road.

How do you cool down a Silverado truck?

Allow the truck 30 minutes to cool down. The coolant system will be under pressure when it is first turned off. Open the hood to access the engine compartment. Locate the radiator in front of the engine compartment. Twist the radiator cap counterclockwise to remove it from the radiator.

Why does the blower motor run after the engine is shut off?

The blower motor resistor module has the blower relay built into it and it could stick as it does have power to it all the time from the FRT HVAC fuse. Test to see if you have a faulty ignition switch, turn OFF the ignition switch and test for power at the HTR-A/C fuse which supplies the power to the HVAC controller’s fan switch.

That relay should be in the under hood fuse/relay box (under hood, left side, behind battery). Starting with the high speed relay, pull it out and see if the fan turns off. Replace the one that causes the fan to go off when removed. I have attached images to help you.

Why does my Chevy Silverado blower not turn off?