95 dual heating climate control problem

[aarcuda]

Darn, it didnt work.

It has to be the hvac computer. I say this because during the two or 3 minutes after starting the car, the blend doord move one way and then the other so they do move but that they move to the wrong position for heating (air flow position ie defrost, floor etc are correct)

The only other cheap solution I can think of is that one of the sensors is bad and that it is tell the hvac computer to put out the wrong air temp out the passenger side.

First I will try the blend door motor since it is only about $40 and I know the gear in there is cracked. if that doesnt work, I'll think about replacing the puter.

[vinceleto]

Originally Posted by oztotl

Give this a try!

-Turn the ignition switch on, but don't start the car.
-Hit the OFF button twice on the climate control.
-Turn the ignition switch off and wait 30 seconds.
-Turn the ignition switch back on again, but still don't start the car.
-Wait 3 minutes before starting the car and trying out the climate control.

That's it.

Let me know if this works for you.
oz

What is that supposed to do?

[aarcuda]

Well I am not sure if that procedure from oztotl worked or not but my heater is starting to work correctly now.

After I performed the steps listed above, the heater was still acting the same (blow cold air on the passenger side) and continued to be screwed up until earlier this week (about 2 weeks after performing the procedure) but now it seems to work correctly.

coincidence??? I dont care.

One thing I didnt mention in my initial post was that the anomaly began happening immediately after I put a new moter in the buick. The power (battery) had been disconnected for a period of 2 or 3 weeks. perhaps this has something to do with it because a year or so ago, I changed out the altenator and also disconnected the battery and the heater screwed up then as well but self healed (although much quicker)

Dont know what it was......

[vinceleto]

Originally Posted by oztotl

Give this a try!

-Turn the ignition switch on, but don't start the car.
-Hit the OFF button twice on the climate control.
-Turn the ignition switch off and wait 30 seconds.
-Turn the ignition switch back on again, but still don't start the car.
-Wait 3 minutes before starting the car and trying out the climate control.

That's it.

Let me know if this works for you.
oz

Oztotl:

Is this a reprograming sequence for the unit if there is a electrical problem? Example Battery goes dead or alternator or something. Reason I ask, before the problem started for me the Starter was replaced. I wonder if there was something that could have caused a surge " I guess some fuse would have blown which it did'nt" or the battery was disconnected. Either way the repair and money have already been spent but would be good to know for the future. Any input?

[lanceharrington]

aarcuda. Do you really have a Cuda. I restore early mustangs. 69-73. Did a 69 Mach and am working on a 71 Mach. I am working with a tech a the local Buick dealer who is selling me the 96 SC and trans plus harness and computer. I will let you know how it turns out.

[aarcuda]

Originally Posted by lanceharrington

aarcuda. Do you really have a Cuda. I restore early mustangs. 69-73. Did a 69 Mach and am working on a 71 Mach. I am working with a tech a the local Buick dealer who is selling me the 96 SC and trans plus harness and computer. I will let you know how it turns out.

ya, i've owned a 70 AAR Cuda since '86. Here my 5 minute website (took me 5 minutes to make) with a front end picture of my car:

http://www.geocities.com/aarcuda72032/AAR_Cuda.html

Mach 1's are cool. I like a lot of the muscle cars from back then. I love my cuda.

I wonder, is the harness different on the SC vs. the non SC? And if so, is the inside harness different as well? I'd hate to be digging the harness out from under the dash. Its really tight in there.

[Flipx99]

Mine does something similar but the temp never blinks. Occasionally, the vents won't blow out air. Any suggestions?

[aarcuda]

one of the things that I found out was that my blend door actuator for the passenger side was definitely bad. I said that I could move the actuator by hand and that was because the gear that moved the rod was cracked so I could force the rod to move.

as someone else posted, you shouldnt be able to move the actuator by hand. I got a new actuator at bumper to bumper auto parts (a delco part) cheaper than from the factory and now everything is peachy keen.

[mdixon]

Originally Posted by oztotl

Give this a try!

-Turn the ignition switch on, but don't start the car.
-Hit the OFF button twice on the climate control.
-Turn the ignition switch off and wait 30 seconds.
-Turn the ignition switch back on again, but still don't start the car.
-Wait 3 minutes before starting the car and trying out the climate control.

That's it.

Let me know if this works for you.
oz

My 95 PA does the same thing blows hot at first flashing display and this above sequence didn't do anything that I can tell
this must be a common problem somebody must know what it is

[jrasche2003]

You had given someone an override code for a climate control problem. I just used this on my car and it worked( my passenger controls totally dead, and of course I got hot on driver freezing on passenger) So I did your directions, and it worked, I get hot on both sides, and when I switch to A?C I also get both sides. I called a Buick Service Center and asked them what this did and they told me they never heard of such a thing. Can you tell me what I just did and how long it will last? And, how did you figure that out? Thanks!

[imidazol97]

Originally Posted by vinceleto

My Father has a similar problem. Heat blows out on the driver side and cold on the passenger side but not always sometimes lukewarm but never hot on the passenger side. Always correct on the Driver side. The temp gauge blinks like you said.
The dealer said they would change the heater programer and one of the
actuators. The part is $498 about $370 if you buy it anywhere else. The total job would have been $900 and change at the dealer. A bit cheaper if you can find someone else who knows what there doing because you can buy the part cheaper.
I could care less if GM went out of business tommorow and would not be suprised if they do.
Further you can't buy a rebuilt programer yet because they don't offer one from 95 on, so they could get you just that much more.

You might want to check prices for repairs on your Lexus and Acura first. GM is cheaper.

[BNaylor]

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