Clicking sound from blower?

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warndogg

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Ok so one day last week I turned the Denali off took the key out and my blower for the HVAC was still blowing. Fast forward to yesterday when I replaced the Blower Resistor with the GM update one...fixed my original problem but now there is a slow clicking coming from the behind my glove box. The clicking is always the same no matter fan speed. And I think it goes away on high. I thought it might need a HVAC system reset so I did that twice but still have this clicking. Any thoughts? It's driving me crazy.
 

M1Gunner

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Can you be more descriptive on the clicking? And if it’s set to full cold a/c raise the temp a couple/few notches and see if the clicking stops.
 
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warndogg

warndogg

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Can you be more descriptive on the clicking? And if it’s set to full cold a/c raise the temp a couple/few notches and see if the clicking stops.

The clicks are steady at about 2 per second. The sound is coming from the blower fan area as far as I can tell. At first I thought it was the fan but it dosen't follow the fan speed. It sounds maybe like a gear? plastic on plastic which is why I thought to reset hvac thinking something was off with a vent door. I will try messing with raising the temp while full a/c is on when I get home later today. As far as I could tell the sound goes away when fan speed is on high. (Either that or I just cant hear it because of the fan noise).
 
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warndogg

warndogg

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No matter what temp or setting climate control is on I have the sound. I dropped the glove box door and put my hand on the heat/ac box or whatever is right behind it and can feel the vibration. I think it might be the blower fan motor. The wife had to use the denali to take the kids to swim lessons. Ill drop the fan tomorrow and take a look.
 
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warndogg

warndogg

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It was my blower motor. I pulled it out and it looks clean but it has a bad wobble to it like something is throwing off balance internally. Guess I'm gonna replace that any suggestion on brands? I am seeing prices from $35 to almost $100.
 
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warndogg

warndogg

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Sorry to keep bugging you M1Gunner. I'm thinking.. not sure but I never had this problem until I replaced the resistor. Could the resistor possibly be the cause of the fan wobble? like it's giving off a weird ohm to the motor?
 

M1Gunner

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All the resistor is doing is supplying different amounts of power to the motor. I’m actually very surprised with your findings considering it didn’t change with fan speed.
 
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warndogg

warndogg

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All the resistor is doing is supplying different amounts of power to the motor. I’m actually very surprised with your findings considering it didn’t change with fan speed.

So I finally put in a new blower motor and it has the exact same tick in it. I think I am going to try a different Heater resistor. Can you tell me exactly which one I need and a part number maybe? I have a 2006 yukon Denali.
 

Doubeleive

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my ex wifes suburban does that, hers has the slider controls, I found that if I adjust the passenger side control just a pinch up from max it doesn't do it, so I told her just use it like that, no problem. lol I think it's a door actuator that just doesn't like to be at max
 

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