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Old 11-23-2009, 01:00 PM   #1
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American Standard Freedom 80 Diagram?


Hi,

I think I need a parts location diagram. The LED is blinking 4 times. I found the codes and wiring diagram inside the panel but cannot locate the part "high limit device". I do not know what it looks like either.

The furnace model# AUD120C954K2.

The fan runs but there is no heat. I replaced the filter; they were totally clogged but no change. I am an electronics tech but not an electrician or HVAC tech. Any help appreciated.

Thanks, John

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Old 11-23-2009, 06:29 PM   #2
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American Standard Freedom 80 Diagram?


Limits are above the burners ,usually 12" or so up.

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Old 11-23-2009, 11:09 PM   #3
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American Standard Freedom 80 Diagram?


Hi,

Could you please look at my attached picture and tell if I have identified the high limit switch correctly?
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File Type: bmp Furnace sml.bmp (96.3 KB, 2182 views)
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Old 11-24-2009, 06:35 AM   #4
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American Standard Freedom 80 Diagram?


The limit is above the two left burners in the picture, the brown rectange with two wires. Check it with your meter.
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Old 11-24-2009, 07:33 PM   #5
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American Standard Freedom 80 Diagram?


Only limit switch I could find in my area was a universal adjustable for $60. Still, less than a service call and it works fine. Thanks again.
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