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Nordine mgbb limit switch trips after blower comes on

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  • Heating & Co... Master
  • 2,525 Answers

I'm guessing that is the "mgbb" is short-hand
for a real number...

The SHORT-HAND answer is that TOP END limit switches
trip because things have gotten hotter than the design intent...

(or ... unlikely that switch is bad).

More likely... the switch that should have turned on the blower (sooner) is not turning on the blower soon enough to dissipate the heat from the exchanger (into the desired area)...

Some of the OLDER VERSION switches are adjustable...
I don't know about NORDYNE (see below, part type).

If you don't mind the risk of electrocution try to start the blower motor sooner... to see if you can avoid the high-temp situation I BELIEVE is causing your grief.

ELSE...
JUST replace the blower motor sensor...
If I'm wrong you have a SPARE sensor you always wanted anyway

$15 ( @ sears)
http://www.searspartsdirect.com/part-number/47-25349-03/0064/879.html?utm_source=bing&utm_medium=cse&utm_term=47-25349-03&sid=SPDxBING

Posted on Dec 24, 2016

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Posted on Jan 02, 2017

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