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lp13-30 lp13-30 is offline
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Default How do I know if furnace thermocouple is bad?

FWIW, the function of a thermocouple is to keep the safety portion of
the gas valve open on systems with standing pilots. Does your unit have
a pilot? There were some units that were available with standing pilots
12 years ago, but they were already getting pretty rare even then. If
you do not have a pilot, I kinda doubt they replaced the thermocouple.
Larry