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I have no fan control or digital read out. What's wrong?

Tiny
AMYS
  • MEMBER
  • 2002 CHEVROLET TRAILBLAZER
  • 175,000 MILES
We changed the battery in my Trailblazer and now I have no control of the A/C or heater fans nor do I have any digital read out. The fan and temp settings can be controlled at both the dashboard and on the steering wheel. It also is a dual climate control. The fan is running when the vehicle is on however it is only blowing hot air which is about ready to melt me since the temp out side is in the 80s and low 90s. Unfortunately I have already paid an auto shop $75 to tell me they don't know what is wrong.
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Sunday, May 20th, 2012 AT 3:35 AM

2 Replies

Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,005 POSTS
SOMETHING STUPID TO TRY

IF IT DOES NOT WORK, I WILL FIND SOMEONE ELSE TO ASSIST YOU!

IN FACT, HE'S ON THE WAY NOW!

DISCONNECT THE POS SIDE OF YOUR BATTERY FOR 5 OR SO MINUTES, THEN RECONNECT WITHOUT FUMBLING AROUND

CAN'T HURT NUTHIN"

THE MEDIC
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Sunday, May 20th, 2012 AT 4:16 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,872 POSTS
How long has the battery been reconnected? What happens, especially with GM's, is the computers lose memory if it is disconnected long enough. Then it takes time for it to relearn.
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Sunday, May 20th, 2012 AT 4:17 AM

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