Fan Blower Motor Stays On
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CF Beginner
Joined: Mar 2019
Posts: 1
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Fan Blower Motor Stays On
I have a 1994 Chevy Cheyenne, two door with the 4.3L that belonged to my dad. It is in fantastic shape, except for when I turn off the ignition - the blower motor under the dash continues to run (more like a whirr), unless I press the OFF button on the AC controller panel first. As long as I remember to push the off button, no issues at all. (I should mention that I have no issues with the A/C or Heater. All fan speeds work fine when running)
Note: it's not pushing out any air through the vents when it does this. You can just hear the motor turning / whirring from behind the dash.
Yesterday, I was going to drive it to work after not driving it for a week or so and the battery was dead. It was an older battery, so it was time. However, when I put the new battery in, I could hear the motor from inside the cab turn on, so I knew that I had forgotten to physically turn it off the last time I had driven it.
I have only been able to find articles about this where the motor stays on all the time after the ignition is shut off and you have to remove the fuse to get it to stop - which is not what's happening here. Those articles say that it is probably the Resistor and/or the Relay.
Everything I read about faulty Resistors say that the motor will stay on always, one speed, or not at all. Nothing about staying running only if I don't actually push the OFF button.
Any thoughts or ideas on if this could be something different?
3,2,1 ... Go!
Note: it's not pushing out any air through the vents when it does this. You can just hear the motor turning / whirring from behind the dash.
Yesterday, I was going to drive it to work after not driving it for a week or so and the battery was dead. It was an older battery, so it was time. However, when I put the new battery in, I could hear the motor from inside the cab turn on, so I knew that I had forgotten to physically turn it off the last time I had driven it.
I have only been able to find articles about this where the motor stays on all the time after the ignition is shut off and you have to remove the fuse to get it to stop - which is not what's happening here. Those articles say that it is probably the Resistor and/or the Relay.
Everything I read about faulty Resistors say that the motor will stay on always, one speed, or not at all. Nothing about staying running only if I don't actually push the OFF button.
Any thoughts or ideas on if this could be something different?
3,2,1 ... Go!
Last edited by totallypaulie; Mar 16, 2019 at 9:02 AM.
CF Monarch
Joined: Oct 2017
Posts: 4,605
Likes: 269
From: USA
I have a 1994 Chevy Cheyenne, two door with the 4.3L that belonged to my dad. It is in fantastic shape, except for when I turn off the ignition - the blower motor under the dash continues to run (more like a whirr), unless I press the OFF button on the AC controller panel first. As long as I remember to push the off button, no issues at all. (I should mention that I have no issues with the A/C or Heater. All fan speeds work fine when running)
Note: it's not pushing out any air through the vents when it does this. You can just hear the motor turning / whirring from behind the dash.
Yesterday, I was going to drive it to work after not driving it for a week or so and the battery was dead. It was an older battery, so it was time. However, when I put the new battery in, I could hear the motor from inside the cab turn on, so I knew that I had forgotten to physically turn it off the last time I had driven it.
I have only been able to find articles about this where the motor stays on all the time after the ignition is shut off and you have to remove the fuse to get it to stop - which is not what's happening here. Those articles say that it is probably the Resistor and/or the Relay.
Everything I read about faulty Resistors say that the motor will stay on always, one speed, or not at all. Nothing about staying running only if I don't actually push the OFF button.
Any thoughts or ideas on if this could be something different?
3,2,1 ... Go!
Note: it's not pushing out any air through the vents when it does this. You can just hear the motor turning / whirring from behind the dash.
Yesterday, I was going to drive it to work after not driving it for a week or so and the battery was dead. It was an older battery, so it was time. However, when I put the new battery in, I could hear the motor from inside the cab turn on, so I knew that I had forgotten to physically turn it off the last time I had driven it.
I have only been able to find articles about this where the motor stays on all the time after the ignition is shut off and you have to remove the fuse to get it to stop - which is not what's happening here. Those articles say that it is probably the Resistor and/or the Relay.
Everything I read about faulty Resistors say that the motor will stay on always, one speed, or not at all. Nothing about staying running only if I don't actually push the OFF button.
Any thoughts or ideas on if this could be something different?
3,2,1 ... Go!
So GM put vents in ther cars doors, as well as leavng the vent air to on the low/floor register to get rid of CO2. which could put a driver to sleep and cuase an accident.
CF Junior Member
Joined: May 2014
Posts: 37
Likes: 0
From: St. Augustine
Chevy has a TSB about the wiring behind the radio causing issues to the HVAC control head. I experienced it on 2 of my Chevy's.
The dash mounting bracket behind the tape/cd player or relocated radio had pinched the wire harness running behind it.
Since this is a simple check/repair I would start here.
Then check the blower resistor.
The dash mounting bracket behind the tape/cd player or relocated radio had pinched the wire harness running behind it.
Since this is a simple check/repair I would start here.
Then check the blower resistor.