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How do I know if my blower motor module is bad?
Symptoms of a bad heater blower motor resistor
- Fan does not work at all, so no air comes out of the vents.
- Fan only works on some speeds and not others.
- Fan only works on the highest speed.
- Fan runs all the time and can’t be controlled with the fan switch.
- You see smoke coming out of the vents.
What makes a blower motor slow?
A capacitor that is malfunctioning or failing can cause the fan’s motor to slow down and/or overheat. In most cases like this, the run capacitor needs to be replaced.
How can I make my AC blower motor faster?
You can increase or decrease the blower speed by slightly adjusting the pulley on the blower drive motor. To increase blower speed, slightly loosen the setscrew that holds the pulley to the driveshaft. Move or turn the pulley clockwise on the shaft one turn, then tighten setscrew.
Why does my AC blower motor not work?
The blower motor relay supplies power to this motor when you turn the switch to “on” that can sometimes fail. When this happens, you may notice that you will not feel anything blowing out of the vents at all. This may also cause the blower motor to work intermittently.
How can I check if my blower motor is working?
Second, check to see if there is any power at the blower motor. Place two large straight pins in the plug of the blower motor but leave the blower motor plugged in. Place a voltmeter across the two pins. Turn on the ignition and turn the blower switch through each position.
Why does my Chevy Silverado blower keep running?
Also, if you smell burning plastic or smoke begins to enter the cabin when the blower is going, that is also a sign you have a faulty blower motor. Finally, if you hear that the blower motor is still running even when the Silverado ignition is in the “off” position, chances are, your blower motor needs replacing. Figure 1. Test your HVAC controls.
Why is the air coming out of my blower so cold?
The air that does come out is Ice cold. So far we checked the selector switch (swapped from properly working truck), inspected the vacuum lines-all seem ok, swapped out blower motor (from the same other properly working truck).