Heat not working
Banned Scam/Spammer
Joined: Mar 2007
Posts: 3,684
Likes: 425
From: Indiana Cornfield
Fuse #27 in the passenger side fusebox? Calling #27 in the passenger side fusebox? Pull it while car is off. Let sit for 15 seconds, put it back in. Could be a matter of blend doors, etc. Pulling and reinstalling this fuse will set those doors right. Hope this helps.
Instructor
Joined: Jun 2020
Posts: 116
Likes: 54
From: Colorado Springs
Hmmmm!
I wish that I knew you could reset the blend doors with a fuse pull earlier this year.
This summer, I got the blend door errors on DIC display with cold air AC on the drivers side and blast furnace heat on the passenger side.
Armed with the error codes, I had the dealership replace the blend doors.
(Removal and replacement of the entire dash seemed like a bridge too far for my C5 maintenance/repair skill set)
Perhaps I could have done the doors reset and saved myself a thousand !
I wish that I knew you could reset the blend doors with a fuse pull earlier this year.
This summer, I got the blend door errors on DIC display with cold air AC on the drivers side and blast furnace heat on the passenger side.
Armed with the error codes, I had the dealership replace the blend doors.
(Removal and replacement of the entire dash seemed like a bridge too far for my C5 maintenance/repair skill set)
Perhaps I could have done the doors reset and saved myself a thousand !
Banned Scam/Spammer
Joined: Mar 2007
Posts: 3,684
Likes: 425
From: Indiana Cornfield
Hmmmm!
I wish that I knew you could reset the blend doors with a fuse pull earlier this year.
This summer, I got the blend door errors on DIC display with cold air AC on the drivers side and blast furnace heat on the passenger side.
Armed with the error codes, I had the dealership replace the blend doors.
(Removal and replacement of the entire dash seemed like a bridge too far for my C5 maintenance/repair skill set)
Perhaps I could have done the doors reset and saved myself a thousand !
I wish that I knew you could reset the blend doors with a fuse pull earlier this year.
This summer, I got the blend door errors on DIC display with cold air AC on the drivers side and blast furnace heat on the passenger side.
Armed with the error codes, I had the dealership replace the blend doors.
(Removal and replacement of the entire dash seemed like a bridge too far for my C5 maintenance/repair skill set)
Perhaps I could have done the doors reset and saved myself a thousand !
One other thing to try for the OP. If you spin your heat/cold **** too fast, it gets out of whack. #27 fixes this too if I remember right.
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Melting Slicks
Joined: Apr 2021
Posts: 2,189
Likes: 82
Mine doesnt either. Does it change from hot to cold and is your ac fully charged?
I was repairing my ac system had an old ambient temp sensor that read 69 default fixed that by replacing rotten plug and sensor so it started blowing air out of all vents finally go to where i think its the hvac blend doors not switching from heat to cold. Do you have both or 4 codes for left right actuators out of range i think HVAC 363, 365?
Trying to alteast get my heater working as well as i havent wasted any freon trying to charge the ac as i still cant even get the heater to function or blend doors to swap from heat.
I was repairing my ac system had an old ambient temp sensor that read 69 default fixed that by replacing rotten plug and sensor so it started blowing air out of all vents finally go to where i think its the hvac blend doors not switching from heat to cold. Do you have both or 4 codes for left right actuators out of range i think HVAC 363, 365?
Trying to alteast get my heater working as well as i havent wasted any freon trying to charge the ac as i still cant even get the heater to function or blend doors to swap from heat.
Melting Slicks
Joined: Apr 2021
Posts: 2,189
Likes: 82
So the ac works but when switched to heater it doesn't blow hot air even with the ***** raised to red heat all the way? Maybe the actuators are stuck in one position? May i ask do you have any actuator codes or any codes at all under the instrument cluster unit for HVAC?