Haunted HVAC
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Joined: Jul 2006
Posts: 93
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From: Syracuse Utah
Haunted HVAC
I have a 2000 C5 with the dreaded dual HVAC. Lately, it has become haunted and starts doing things all on its own. Modes switch, AC activates, cant manually switch modes and other weird things. Did a forum search and didnt see anything like this. Is the head unit toast?
Drifting
Joined: Feb 2008
Posts: 1,617
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From: San Diego California
I have a 2000 C5 with the dreaded dual HVAC. Lately, it has become haunted and starts doing things all on its own. Modes switch, AC activates, cant manually switch modes and other weird things. Did a forum search and didnt see anything like this. Is the head unit toast?
Tech Contributor
Joined: Dec 2003
Posts: 19,384
Likes: 87
From: Horncastle Lincolnshire, England
2023 C5 of the Year Finalist - Unmodified
I see you're in Utah. Did the temperatures drop recently?
Dont forget below 35 degrees the unit wont operate in AC mode. Are you getting a flashing AC light?
The air conditioning does not operate at temperatures below approximately 35F to 40F (2C to 4C). The light on the A/C button will flash if
pressed when air conditioning is not available.
It should come back up in the last mode it was shut down in. The AC will run automatically to dehumidify the cabin if >35 degrees.
Its worth a re read of the owners manual because its smarter than it seems. HTH
Dont forget below 35 degrees the unit wont operate in AC mode. Are you getting a flashing AC light?
The air conditioning does not operate at temperatures below approximately 35F to 40F (2C to 4C). The light on the A/C button will flash if
pressed when air conditioning is not available.
It should come back up in the last mode it was shut down in. The AC will run automatically to dehumidify the cabin if >35 degrees.
Its worth a re read of the owners manual because its smarter than it seems. HTH
Last edited by DeeGee; Nov 18, 2008 at 01:34 AM.
