ac/heat on at the same time
Thread Starter
Cruising
Joined: Feb 2011
Posts: 13
Likes: 0
From: easton md
ac/heat on at the same time
My window seals leaked and now my AC and heat are both on at the same time. I found this out when the fan cut off. I replaced the fuse and now the heat is blowing at the same time the cold air is blowing. the vent on the right is cold but the main vent is blowing hot. I think the heater core may be stuck on because when I press the AC button the car engine pulls a little harder indicating the compressor came on.
Last edited by sgtrock63; Aug 31, 2012 at 04:11 PM. Reason: forgot something
Le Mans Master
Joined: Oct 2007
Posts: 6,868
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From: Kelso Washington
St. Jude Donor '09, '13, '15
does your temp control dial work?
As far as I know the A/C stays on at all times you are on auto to keep moisture low in the cabin.
What happens when you spin the temp control to the left?
Is your display working?
edit: Oh....I just re-read and see the disparity between vents.....odd!
As far as I know the A/C stays on at all times you are on auto to keep moisture low in the cabin.
What happens when you spin the temp control to the left?
Is your display working?
edit: Oh....I just re-read and see the disparity between vents.....odd!
Thread Starter
Cruising
Joined: Feb 2011
Posts: 13
Likes: 0
From: easton md
ac/heat
i can see the display although it is kinda faint. it says 60. you can feel the ice cold air on the right side. I have a feeling it was all the water in my floorboard from the leaky seal. The curcuit might be stuck open.
Le Mans Master
Joined: Oct 2007
Posts: 6,868
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From: Kelso Washington
St. Jude Donor '09, '13, '15
Question to others: Most cars have vacuum actuators for vent flaps etc. Does the Corvette too?
If so, maybe there is water in a vacuum line preventing the flap from getting the vacuum to move......I dunno.
If so, maybe there is water in a vacuum line preventing the flap from getting the vacuum to move......I dunno.
Team Owner
Joined: May 2001
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From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
On the C5 it's electric stepper motor that moves the internal damper door line-up thereby changing from heat to cold (or blend) for temperature control. Not vacuum.
Vacuum is used for mode select plus there's no heater control valve to shut off hot water to the heater core.
The OP's problem is not uncommon of CJ2 (auto) HVAC systems in C5s. There are two actuators (right/left) than be out of sync with each other or if one has failed possibly. Sometimes a "re-sync" is all that's necessary.
Lots of posts on this topic.
Thread Starter
Cruising
Joined: Feb 2011
Posts: 13
Likes: 0
From: easton md
ac trouble
On the C5 it's electric stepper motor that moves the internal damper door line-up thereby changing from heat to cold (or blend) for temperature control. Not vacuum.
Vacuum is used for mode select plus there's no heater control valve to shut off hot water to the heater core.
The OP's problem is not uncommon of CJ2 (auto) HVAC systems in C5s. There are two actuators (right/left) than be out of sync with each other or if one has failed possibly. Sometimes a "re-sync" is all that's necessary.
Lots of posts on this topic.
Vacuum is used for mode select plus there's no heater control valve to shut off hot water to the heater core.
The OP's problem is not uncommon of CJ2 (auto) HVAC systems in C5s. There are two actuators (right/left) than be out of sync with each other or if one has failed possibly. Sometimes a "re-sync" is all that's necessary.
Lots of posts on this topic.
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