ECC Air Recirculation/ Air Mix Door - Page 2 - 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.

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Old 08-08-2007, 07:22 PM   #11
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Could one of these faults being recirculation-related? If not..how do you diagnose when everything else works fine?
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Old 08-08-2007, 07:47 PM   #12
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Quote:
Originally Posted by ChilinMichael
Could one of these faults being recirculation-related? If not..how do you diagnose when everything else works fine?
I am pretty sure if there is a problem fault with the the recirculation door operation, then it will show as a fault...it may not identify specifically a "recirculation door", but may be one of several issues grouped under a more generic fault. I really don't know. A tech II scanner (usually only dealer and high end shops have one) would tell what fault(*) the programmer is seeing. If the fault is not specific, not shown, or generic, then the FSM has many, many procedures a mechanic can do to test for ALL the possibilites in the HVAC system and the mechanic would follow the steps for "no operation" (as an example...I don't know if that is what it is called) of the recirulation mode. And many of these tests REQUIRE a Tech II scanner to perform.
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Old 08-08-2007, 08:26 PM   #13
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Just where is this recirculation door? Is it easy to access?
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Old 08-08-2007, 09:14 PM   #14
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Quote:
Originally Posted by ChilinMichael
Just where is this recirculation door? Is it easy to access?
I really don't know. Never had a reason to get to mine, but I am sure it is somewhere under the dash or on the firewall.
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Old 08-10-2007, 11:26 AM   #15
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OK, looking through the FSM (for '97 H-body) last night, I didn't find a whole lot about the recirculation door.

There is no specific "fault" code identifying a problem with the "ricirc" mode. The door is driven by a vacuum operated actuator, and the vacuum supply line is the orange tube coming out of the back of the vacuum connector in the HVAC programmer. I found a crude "flow" diagram showing the actuators and doors, but never did find a specific diagram showing the actual location on where it is.

Sorry, I will look futher this weekend to see if I can find something better.
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Old 08-10-2007, 12:30 PM   #16
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Quote:
Originally Posted by Echo SSEI
There is no specific "fault" code identifying a problem with the "ricirc" mode. The door is driven by a vacuum operated actuator, and the vacuum supply line is the orange tube coming out of the back of the vacuum connector in the HVAC programmer. I found a crude "flow" diagram showing the actuators and doors, but never did find a specific diagram showing the actual location on where it is.
.
This is a graphic of the vacuum motors. I believe it'* #1 that opens the recirculate door which actually opens above the driver'* foot.

For reference the bundle of tubes in the picture is coming across the front of the heater box below (and behind) the radiator area.

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Old 08-12-2007, 05:11 PM   #17
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So how would I go about getting to this to check out the lines and such? Glovebox removal or?
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Old 08-13-2007, 02:03 AM   #18
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It appears the actuators are located under the dash, pretty much in the center or maybe above the gas pedal. For Bonne'* with ECC, the orange vacumm line is with 4 (or 5) other different colored vacuum lines attached to a clear connector that can be accessed by removing the black plastic panel under the dash, on the passenger -side, above where the passengers feeet would be. You may be able to follow the orange line to actuator, but it may just disappear up into the dash along with the other lines and any bundles of wires.
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