HVAC Only blows hot air

Tiny
M-FERG
  • MEMBER
  • 2001 CHEVROLET S-10
  • 4.3L
  • V6
  • 2WD
  • AUTOMATIC
  • 142,000 MILES
HVAC only blows hot air. How to sync blend doors?
Friday, June 21st, 2019 AT 3:34 PM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good evening,

Does the compressor turn on when you command AC? Do you know the pressures?

https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak

Roy

Procedure

RE-CALIBRATING ACTUATORS

Use the following steps to perform the calibration update:
1. Turn OFF the ignition.
2. Remove the battery positive voltage circuit fuse of the HVAC Control Module.

IMPORTANT: The module memory will not clear if the battery positive voltage circuit fuse is installed in less than 60 seconds.

3. Wait 60 seconds.
4. Install the fuse.

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Friday, June 21st, 2019 AT 4:13 PM

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