A/C blower not working properly

2005 CHEVROLET SUBURBAN
108,500 MILES • 5.3L • V8 • 4WD • AUTOMATIC
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the A/C blower will just shut off and then eventually come back on, blower works fine on heating.
Jun 16, 2021 at 9:09 AM
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KASEKENNY
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Just want to be sure I understand the issue. When you have the A/C on the blower will stop blowing all together and then just come back on but it works fine and never shuts off on heat?

If this is the issue then I am thinking we just have a blower motor issue but we need to confirm this.

Here is a guide that will help with detailed info about no air from the vents:

https://www.2carpros.com/articles/low-or-no-air-flow-from-vents

Also, if the blower shuts off when the A/C is on, what happens if you change it to heat? Does it immediately come back on?

What I would suggest starting with is when this shuts off to check power to the blower and see if it is there. If you have power at the blower then the motor needs to be replaced.

If there is no power then the likely issue is the control processor but we can get to that when we know what the issue is here.

https://www.2carpros.com/articles/how-to-check-wiring

However we are going to want to check power coming to the process but I suspect you will find your issue prior to this.

Let me know if you have questions on this and what you find. Thanks
Jun 17, 2021 at 6:42 PM