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Setting hotter or colder it starts flashing arrows?

Tiny
JEFFREY L JONES
  • MEMBER
  • 1991 CHEVROLET SILVERADO
  • 5.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 227,000 MILES
The fan blows / the doors change from defrost to dash vents to floor but when I try to change the temp setting hotter or colder it starts flashing arrows all the way across the temp setting and stays until I shut the power off when I turn it back on everything looks normal
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Sunday, January 25th, 2015 AT 8:02 AM

2 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
If this is automatic temp control, I think the HVAC control has gone out.
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Sunday, January 25th, 2015 AT 8:29 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,512 POSTS
Yep, this means the temperature blend door actuator has gone out, here is the location so you can change it out to help fix the problem. Check out the images (below). Let us know if you need anything else.
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Thursday, September 12th, 2024 AT 6:29 PM

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