manual climate control randomly works

1993 BUICK PARK AVENUE
190,000 MILES • 3.8L • V6 • 2WD • AUTOMATIC
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JIRI JANOUS
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  • 3 POSTS
I have a manual climate control in the vehicle. Switching between functions works only randomly, sometimes it switches, sometimes it cannot switch. I have checked all the connectors and are fine.
Apr 18, 2018 at 9:09 PM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
Good morning.

Which air flow is not working correctly?

Roy
Apr 18, 2018 at 10:28 PM
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JIRI JANOUS
  • MEMBER
  • 3 POSTS
Good evening,
according to the manual is equipped Electronic Touch Climate Control System. Times often happens during the ride that all the options (vent, heater, defog, windscreen, off, max, norm, bi-lev) cease to operate, they can not switch. Sometimes they all start working. Both the fan and the temperature change function normally.

Jiri
Apr 19, 2018 at 5:47 AM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
Okay, so it is not manual, it is automatic climate control. that makes better sense.

It sounds like the control head is dropping out.

let me see if I can get some information for you on this.

Roy
Apr 19, 2018 at 5:54 AM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
There is a programmer behind the glove box that controls all the functions. it is possible that it is malfunctioning. you need a special scan tool to check the system.

Roy
Apr 19, 2018 at 6:12 AM
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JIRI JANOUS
  • MEMBER
  • 3 POSTS
Hello,
You were right, there was a relaxed contact on HVAC heater blend door actuator. It is working again. Thank you, yours sincerely, Jiri
Apr 20, 2018 at 6:09 AM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
You are welcome. glad you found the issue.

Roy
Apr 20, 2018 at 6:13 AM
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