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post #1 of 3 (permalink) Old 09-08-05, 07:07 AM Thread Starter
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confused Auto Climate Control Issues - Blend Door? - 01 Sable LS

I have a '01 Sable LS Premium, and it seems that the auto climate control is having some "issues". As long as it's warm outside and just the A/C is used, everything works well. But as soon as the heat is needed for whatever reason, the heater will come on, but the blend door will not reset when cool air is once again required. All vent positions are working and the fan motor seems to be ok also. But when it's warm outside and I turn on the A/C (on any level), the car blows hot air.

I'm able to unhook the battery to fix this. I can also fix this by hooking up a higher-end OBD sensor and doing a full diagnostic. Since the blend door seems to work, I'm beginning to believe that this is a A/C control unit issue.

Anybody had this problem before? Any suggestions?

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post #2 of 3 (permalink) Old 09-20-05, 09:25 AM
zap
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mad Re: Auto Climate Control Issues - Blend Door? - 01 Sable LS

I have the same problem with 01 Sable Wagon. I haven't tried the battery disconnect fix yet.

When I took it into the dealer, they returned it and said there wasn't a problem. It did, in fact, work properly when i got in it, but I did notice that the outside air temp sensor was reading 96 ยบ and is was slowly falling. Did the technician blast the sensor with hot air to somehow trigger the climate control system to get unstuck? I don't know. I do know that the car had not been in the sun, and it wasn't a hot day.

Anybody have this expereince?

Thanks!
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post #3 of 3 (permalink) Old 09-23-05, 12:17 PM
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Thumbs up Re: Auto Climate Control Issues - Blend Door? - 01 Sable LS

2001 sable, same problem with 1999 sable
everytime I brought it in they would disconnect it and say it works fine...
Never tried the battery disconnect.

Just replaced the blend door motor and that did not work either.
I never knew air could get that hot!!!
Door only has to move a fraction to loose cold air.

Got it. Disconnected/reconnected the battery and restarted the car.... worked like a champ.
I probably needed the blend door motor because it was moving before but not going to completely closed (all cold).
and the new one just sat there locked in the middle and would not move.

See 96 degrrees above. Took the old motor apart. it is a dumb DC motor that keeps turning until it makes some contacts inside. It was not moving because the last info it had was from the old motor that said the swith was made, loss of power erased memory and reset to fully open or closed.


when in doubt. disconnect the battery. thanks all. made my day
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