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Old 05-26-2006, 04:04 PM   #1
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A while back I replaced my heater core on my 94 bonneville se because it was soaking my passenger side floor. I am beginning to put it all back together now. New heater core is in place, and I found a broken vacuum line in the process. It was a purple line and when it wasn't connected I would only get air from the floor and defroster vents. The air was getting was cold. I fixed the vacuum line and now I am getting air from the front air vents but it is hot air.

Do I have a block? I have been reading a little bit on the forums and can't quite figure it out. Its hot and humid down here.

By the way, all the fans are turning, the compressor is ice cold, and I have enough freon in the system.

Thanks for any help that you can offer!
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Old 05-30-2006, 05:40 PM   #2
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Your best bet for this is to read this entire thread AND the linked attachments. A lot of reading, but quite a bit of good information in there.

Bottom line - you likely need at least a recalibration (instructions in thread) and possibly an airmix door actuator reset. (procedure in thread).

Feel free to ask further questions though.
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Old 05-30-2006, 08:25 PM   #3
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Quote:
Originally Posted by lash
Your best bet for this is to read this entire thread AND the linked attachments. A lot of reading, but quite a bit of good information in there.

Bottom line - you likely need at least a recalibration (instructions in thread) and possibly an airmix door actuator reset. (procedure in thread).

Feel free to ask further questions though.
Psst....Mike.......you forgot to link him to the thread - http://www.bonnevilleclub.com/forum/...ghlight=airmix

Anyways, this link is for ECC (Electronic Climate Control)...the manual control works on similar principles, but there may be differences. Also, not sure if '96-99 is the same as '94. Seein as you have an SE, do you have the ECC or the manual controls with the three *****?

The purple line is the vacuum feed for the system to determine airflow control, but I forget if it anything to do with the air tempurature...that is usually the airmix door actuator. I suppose you could have a block, but I would still expect you to get cold air.
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Old 05-31-2006, 08:04 AM   #4
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Uhm...Yeah...the link.

Anyway, here'* the thread I was talking about. It includes the link posted above plus a bunch of other diagnostic information and a specific link to the Airmix Door Actuator issue and repair.

A/C Blows Hot All The Time
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Old 05-31-2006, 12:18 PM   #5
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A little more reserach last night leads me to believe that cold air is not affected by the vacuum lines in the system. AC and cold air appears to be all electronically controlled, so reattaching the purple vacuum line should not have affected cold air by itself.
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Old 05-31-2006, 03:32 PM   #6
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Right, but the door actuator IS affected by the vacuum controller, correct? He may have caused the door to shut off the flow of cold air when he plugged in the purple vac line. Especially if the actuator was miscalibrated or broken.

I'm just guessing here, based on what little I do know of how the system works.
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Old 05-31-2006, 04:37 PM   #7
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Quote:
Originally Posted by lash
Right, but the door actuator IS affected by the vacuum controller, correct? He may have caused the door to shut off the flow of cold air when he plugged in the purple vac line. Especially if the actuator was miscalibrated or broken.

I'm just guessing here, based on what little I do know of how the system works.
Nope...from what I can see, the air mix door is entirely electronic and controlled by the motor and arm. So, unless the vacuum lines commanding where air is directed is also tied into signaling the AC, then his problem is probably not related to the purple line....that is what has me confused, here. Unless an electrical line was knocked off at the time of reconection of the purple line, then I can't find a relationship for losing the cold air.
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Old 05-31-2006, 04:51 PM   #8
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OK, so we need to have Pinion verify what exactly is happening. I read above that his compressor is working and his lines are cold, but no cold air. That gave me the impression that the A/C is working, but the airmix door is not routing it to the cabin.

Pinion, are you still there? Can you verify what exactly is happening to the best of your ability?
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Old 05-31-2006, 05:20 PM   #9
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Quote:
Originally Posted by lash
OK, so we need to have Pinion verify what exactly is happening. I read above that his compressor is working and his lines are cold, but no cold air. That gave me the impression that the A/C is working, but the airmix door is not routing it to the cabin.

Pinion, are you still there? Can you verify what exactly is happening to the best of your ability?
Agreed.....I would vote for the airmix door as well, which from everything I have looked at is electronically controlled. Hopefully, just a recalibration is in order.
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Old 06-01-2006, 01:44 PM   #10
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I see a problem...after replacing my heater core, I put back on the large plastic housing that went around the heather core. On that housing was a small plastic box (i think it controls the airmix door). On that box is a metal rod, which broke off in reinstallation. I can fix the problem by reattaching the rod, but where does the rod connect to other than the plastic housing?

BTW, I have the manual (3 *****) controller.
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