HVAC temperature sensor location

TIM DAVIS4

MEMBER
2005 CHEVROLET SILVERADO
5.3L
V8
2WD
AUTOMATIC
120,000 MILES

Recently I had the headliner in my truck replaced and since then the automatic A/C seems to be too cold. You have to turn it upwards of 85 or more and even then it seems like it doesn't vary the speed like it use to. Is it possible that device in the ceiling headliner above the driver's head is the issue? I have no idea what that device does but someone mentioned they thought it was what allowed the auto A/C to detect the inside temperature but wasn't sure. I don't know if they plugged it back in or if it's bad so thought i'd ask an expert in case that was the issue. Thanks for any help you can give.

1 Reply

ASEMASTER6371

MECHANIC
52,797 POSTS

Good afternoon,

When they replaced the headliner, they may have either damaged the sensor or used too much insulation so the sensor does not read correctly.

I posted the procedure with some pictures for you.

Roy

INSIDE AIR TEMPERATURE SENSOR ASSEMBLY REPLACEMENT

REMOVAL PROCEDURE
1. Remove the left windshield garnish molding.
2. Remove the left center pillar assist handle.
3. Remove the left center pillar garnish molding.
4. Remove the left sunshade.
5. Gently pull down the headliner.

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6. Disconnect the electrical connector from the inside air temperature sensor.
7. Partially remove the inside air temperature sensor from the headliner.
8. Remove the sensor grille from the inside air temperature sensor.

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9. Remove the inside air temperature sensor from the headliner.

Images (Click to make bigger)