lennox furnace model G12D2E-82-8 issues

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lennox furnace model G12D2E-82-8 issues

01-15-2014, 04:33 PM

whunter

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Location: Metro Detroit, Michigan

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lennox furnace model G12D2E-82-8 issues

I am 99% sure it is the fan limit switch, causing frequent furnace blower cycling, (even when the burner is off).
It was replaced 20 years ago for the same issue.

fan limit switch
Lennox# 15P38
or
Honeywell# L4064W1098

As a momentary fix, changing the fan limit switch setting 5° F seems to have reduced the frequent blower cycling issue.

.

Last edited by whunter; 01-15-2014 at 04:48 PM.

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