Does the difference in resistance matter if you replace a 24-inch 30mv thermocouple that has a thermal switch versus one without the thermal switch?
I bought a generic Honeywell 30mv 24-inch thermocuple (PN CQ100A1013) from Ace Hardware:
That picture in the URL above is wrong because it's 24 inches:
When I went to put it in the hot water heater, I belatedly realized the original thermocouple has an integral thermal switch.
I know the length matters, from a resistance standpoint, but the hardware store owner had never heard of a thermocouple with at thermal switch before:
The thermal switch is a safety feature that will shut down the pilot if the heat under the hot water heater gets too great:
When I call Sears in San Jose at 408-274-2593, they confirm the part number is PN 9000056015 but that replacement part doesn't seem to have a thermal switch on it.
Have you ever had to make the decision of whether to replace a thermocouple that had a built-in thermal switch with a generic thermocouple that had no thermal switch? Did the resistance match?