Electric Climate Control Problems
Thread Starter
Instructor
Joined: Oct 2001
Posts: 185
Likes: 0
From: north east area Old Line
Electric Climate Control Problems
I know this can't be a new issue, but I'm rather new to the forum. I have a 1991 with electric climate control. I've been having several problems with it. One of the problems is that at 90 degrees it will be hot then at 85 degrees it is freezing.
Second problem is that it will stop working, when I'm on a 6 hour trip and it's freezing out side... the heat just decides to stop working. I start pushing all the buttons on the panel and nothing. Sometimes if I stop the car and then resart it, the heat will the come back on. Does this have something to do with the fan?
THird problem is that when I first push the buttons for where I want the heat to come out the fan speed reads "0" and blasts air... I then push the up or down arrow to get it at the speed I want.
Thad
Second problem is that it will stop working, when I'm on a 6 hour trip and it's freezing out side... the heat just decides to stop working. I start pushing all the buttons on the panel and nothing. Sometimes if I stop the car and then resart it, the heat will the come back on. Does this have something to do with the fan?
THird problem is that when I first push the buttons for where I want the heat to come out the fan speed reads "0" and blasts air... I then push the up or down arrow to get it at the speed I want.
Thad
Team Owner
Joined: Sep 2001
Posts: 62,160
Likes: 1,733
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Re: Electric Climate Control Problems (tgroghan)
i think you might have to replace the whole unit. But you could try gettin in there and cleaning the connectors and see if it does anything.
Le Mans Master
Joined: Mar 1999
Posts: 7,996
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From: McAlester Oklahoma
Re: Electric Climate Control Problems (vader86)
:eek: I hate to tell people this but most of the time it's a bad ground that causes those sort of problems. When mine acts up I double up my fist and whop the heck out out the sides of your tranny hump on the carpet. If it starts working you've found your short. :yesnod:
Thread Starter
Instructor
Joined: Oct 2001
Posts: 185
Likes: 0
From: north east area Old Line
Re: Electric Climate Control Problems (Casper)
If it was a bad ground... Then the Hot air should not work when it's at 90.... As for cleaning the connectors. What connectors do I clean. I took it out the other day and tore it apart, I didn't see anything to clean off.
Thad
Thad
Burning Brakes
Joined: Dec 2000
Posts: 1,161
Likes: 0
From: Orangeburg, NY
Re: Electric Climate Control Problems (tgroghan)
Chances are you have a bad programmer. But first check all of the vacum hoses in the back of your engine. There should be a vacum t near the drivers side valve cover near the fire wall.
If the vacum is ok check the programmer. It is located near the brake pedal attached to the firewall. It is usually a black box approx 4"x6" with a vacum harness, wire harness, and one bolt. Remove the programmer and open it up. On the transistor board in the upper right hand corner are two transistors. Check to make sure the connections are ok. The connections are bad if there are cracks or the soldier is dull gray (not shiney). Resoldier the connections and then check the system. If you are not familiar with the programmer, take it to a tv repair shop and ask them to check the connection and if the resistors are ok. They cost .49 for two at Radio Shack and are (I believe 120 ohm).
Chevy has a problem with these resistors. They hold too much heat and you may notice the board around the resistors discolored, usually brown in color.
Hope this may help.
If the vacum is ok check the programmer. It is located near the brake pedal attached to the firewall. It is usually a black box approx 4"x6" with a vacum harness, wire harness, and one bolt. Remove the programmer and open it up. On the transistor board in the upper right hand corner are two transistors. Check to make sure the connections are ok. The connections are bad if there are cracks or the soldier is dull gray (not shiney). Resoldier the connections and then check the system. If you are not familiar with the programmer, take it to a tv repair shop and ask them to check the connection and if the resistors are ok. They cost .49 for two at Radio Shack and are (I believe 120 ohm).
Chevy has a problem with these resistors. They hold too much heat and you may notice the board around the resistors discolored, usually brown in color.
Hope this may help.
Le Mans Master
Joined: Jan 2001
Posts: 8,169
Likes: 1
From: Knoxville,TN TN
St. Jude Donor '03
Re: Electric Climate Control Problems (tgroghan)
I do not think there is anything wrong with your system my does the same thing. At 90 the system will give all that it has when you turn it down to 85 the inside sensor (feels) the air (Keep sensor clean) and it takes a while to see that the air is cold and it will turn the heat back on. The 0 is max air flow ffor the system when you need lots of air hot or cold. I hope this helps. :D :D
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