Chevrolet Silverado 2014-Present: Why Does My Blower Motor Not Work?
Whether it's hot or cold, you expect your Chevrolet Silverado's AC or heater to take care of you. But what to do if it doesn't?
This article applies to the Chevrolet Silverado 1500 (2014-Present).
It's a hot summer day, you reach over to the dash knob and you crank on your AC. After a few minutes go by, you notice nothing is happening, or even worse — it's just warm air. If you live in the north, the same thing could happen with your heater on a cold and snowy day. What could be causing this problem? The blower motor is supposed to operate the fan, then blows air into the ducts, which is later cooled or heated by the system. There are a few common things that could cause this problem. We've compiled a list of those, and remember that if the problem persists, it's wise to visit your local dealer or repair shop.
Step 1 – Check the resistor module
It could be melted.
There have been multiple reports of the blower motor resistor melting or overheating. This damage could cause the blower motor to stop working, or to actually stick on and never shut off. You can check this by accessing the panel behind the fuse box, and looking for the resistor module. Once you locate the resistor module, inspect the metal connector. If it needs to be replaced, you must cut the connector, splice it, and replace it with a new connector.
Pro Tip
Always make sure that the ignition is off and there is no electrical current active in the vehicle.
If that doesn't fix the problem, move forward to Step 2.
Step 2 – Check the switch selector
It could be faulty.
Whether you have a physical fan speed switch or the dual climate feature in your Silverado, there is a button or switch that is dedicated to start or speed change of the blower for the AC or heater. Sometimes this switch can fail, and leave you with no way to turn on or operate the blower speed. You can test this by making sure the wiring behind the dash is in good shape. Check to see if the buttons are clean and aren't damaged. If you have a model with dual climate, you will need to replace a resistor behind the dash. If you don't have dual climate, a simple switch selector will need to be swapped out.
If the result of that doesn't take care of the problem, then move on to Step 3.
Step 3 – Check the blower motor
It could be dead.
If you have inspected the resistor and it is in good shape, then root of the problem could be a dead blower motor. You have to work in the engine bay and disconnect the current motor to check its' voltage and make sure it is receiving power. If the power source isn't the issue, then the motor may have just seized up. You can replace the blower motor yourself, or you can visit your local dealer or repair shop.
Pro Tip
There have been Technical Service Bulletins issued for similar problems, it's always a good idea to use those as reference.
Related Discussions and Site
- Silverado Blower Motor Issues - Chevroletforum.com
- Heater and AC Control Problems - Chevroletforum.com
- NHTSA Technical Service Bulletins - nhtsa.gov
