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This is the same as the limit switch, just a second one it is still a normally closed circuit that opens at whatever predetermined set point

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Q: What is the auxilliary limit switch on a evcon gas furnace?
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How do you repair a furnace limit switch?

When a typical residential furnace or gas package unit "high limit switch" is found to be bad it is replaced with a new one-not repaired.


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Why won't your Goodman heater model GMT090-3B start when the thermostate is turned up?

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Gmp o75 furnace that will start up fire up and as soon as fan kicks on it shuts off have replaced board and open limit switch what else should you look for?

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