1994 SLS x 2 ---- 1993 Eldorado Sport ----- 1994 Deville 4.9
Joined
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1,540 Posts
Drove the Seville yesterday, the lady of the house normaly drives it.
Something has gone wrong with the HVAC system and i am confused about where to start looking.
I get going down the road and notice it is on defrost setting, that was not needed so i selected auto.
It went to blowing heat (from dash vents? I do not remember) until i thought i would loose my mind.
Later in the day it switched over to AC blowing out of the dash vents.
that persisted for rest of the day, I even tried economy, that setting was all weird also.
The outside air temp reading seems correct and the control panel seems to be functioning.
No trouble codes for the HVAC system.
Things that come to mind.
Vaccum leak?
Blend door malfunction?
That controler box thingy with all the vaccum lines?
Something has gone wrong with the HVAC system and i am confused about where to start looking.
I get going down the road and notice it is on defrost setting, that was not needed so i selected auto.
It went to blowing heat (from dash vents? I do not remember) until i thought i would loose my mind.
Later in the day it switched over to AC blowing out of the dash vents.
that persisted for rest of the day, I even tried economy, that setting was all weird also.
The outside air temp reading seems correct and the control panel seems to be functioning.
No trouble codes for the HVAC system.
Things that come to mind.
Vaccum leak?
Blend door malfunction?
That controler box thingy with all the vaccum lines?