A/C blower only works on max speed

2003 CHEVROLET MONTE CARLO

111,000 MILES • 6 CYL • 2WD • AUTOMATIC

MATT CERLINI

MEMBER
1 POST

My air conditioner works fine and so does the heat, however.
No other air speed works other than the max speed (I used to be able to toggle between 2/3 and trigger 3 speed) but when I switch to those speeds the car itself kind of sounds like it’s running the condition but no air until I put it on max.

Jul 7, 2022 at 11:58 AM

JACOBANDNICKOLAS

✓ASE Certified Mechanic
110,194 POSTS

Hi,

The most common cause of it only working on high is a faulty blower motor resistor. This part is located under the dash, passenger side, at the blower motor housing.

I attached the directions below specific to this vehicle for replacement. This is what I suspect is causing the problem for you.

Let me know if this helps or if you have questions.

Take care,

Joe

See pics below.

Images (Click to enlarge)

Professional Diagram for 2CarPros Members
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Jul 7, 2022 at 2:35 PM