ECC temp reversal - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Reply
 
 
 
Thread Tools Search this Thread
Old 08-24-2007, 12:01 AM   #1
Junior Member
Thread Starter
 
Join Date: Aug 2007
Location: MN
Posts: 7
Thanks: 0
Thanked 0 Times in 0 Posts
iggy is on a distinguished road
Default ECC temp reversal

I have a 95 sse that I've replaced the air mix actuator (used from savage yard) but now it gives me cold when I set the temp high (90 degrees) and heat when I set the temp low (60 degrees). I even got another actuator from the savage yard but still gives me the reverse of what I set the temp for. I can't even perform the calibration as specified in the excellent "air mix actuator procedure" because the arm moves all the way to the left and not the right when I set the temp all the way up to 90. However it does move from left to right then back to the left after I start the car while its blinking the ECC display. The arm movement is smooth and both actuators have no extra play in the rotation of the arm before I tried either one of them. Everything else in the HVAC system works regarding the movement of the vents/doors.

To make it give me what I want for temp I have to perform the following after starting the car which always causes the ECC display to blink while it tries to perform a calibration:
1) Turn off the ECC then turn it back on (auto button)
2) Set the temp to the opposite of whats desired (has to be max either way)
3) Manually override the choice of vents as its usually the opposite of what you want

Now before I noticed the air mix actuator went bad, a burning electric smell would occasionally come and go while driving with heat selected. I suspect this was likely the HVAC programmer driving the actuator passed its full open/closed position until it broke it.

Anyways I've read several postings related to the ECC/air mix actuator but none seem to be the same temp-reversal I have. I'm beginning to think its the programmer now which as you know isn't cheap so any advice would be greatly appreiated. Thanks.
iggy is offline   Reply With Quote
Old 08-24-2007, 03:16 AM   #2
Senior Member
True Car Nut
 
Join Date: May 2005
Location: _Phoenix, AZ_ _WCBF '05, '06, '07 Survivor_ ____NEBF '07 Remnant___
Posts: 3,448
Thanks: 0
Thanked 0 Times in 0 Posts
Echo SSEI is on a distinguished road
Default

This is the first time since I have been here that I have heard of this happening. As you probably already know, the blinking ECC display is the programmer telling you that it sees an issue. So, your saying that you can get cold air by selecting 90* (or max) and the air stays cold for a long drive?

Unless something is hooked up backwards, I would think it it would have to be the programmer, since it provides the inputs that drive the temp as well as air discharge locations utilized. Default (if the system fails) is hot air from the floor vents and defrost.

This issue is totally baffling.
Echo SSEI is offline   Reply With Quote
Old 08-24-2007, 01:51 PM   #3
Junior Member
Thread Starter
 
Join Date: Aug 2007
Location: MN
Posts: 7
Thanks: 0
Thanked 0 Times in 0 Posts
iggy is on a distinguished road
Default

Yes once I set the temp high (90) on the ECC display the actuator arm stays in the cold position (all the way to the left) and vice versa.

I also thought I had reversed some of the programmer wires when I added the extension per the instructions but that checked out to be correct. I even thought about actually swapping the wires around but I'm not sure which wires to swap. Anybody have the schematic of what the wires do from the programmer to the actuator so I could try this?
iggy is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
UPDATE ECC temp is blinking - ? nick s 1992-1999 52 02-27-2015 11:51 AM
ECC external Temp stuck at 50* charliemax Everything Electrical & Electronic 2 07-23-2010 06:42 PM
The dreaded ECC temp display flash. Andx0r 1992-1999 19 09-28-2007 06:36 PM
ECC Temp flashing 92BonneSE 1992-1999 5 07-17-2007 12:04 PM
ECC temp light blinking macho_mike21 Audio (and aftermarket electronics) 4 04-25-2005 09:33 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 09:18 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.