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the 940-0001-55 is the direct technical replacement for the discontinued 040-0166-15 part number
Key Benefits Thermal Protection: Prevents heat exchanger warping by cutting power at a calibrated 240°F threshold
which simplifies wiring in retrofit applications
the SPDT switch allows you to wire the common-normally open circuit to shut down or signal a boiler if the pipe temperature exceeds the setpoint
6-inch diameter) and a 1/2-inch by 2
Carrier HH12AT008 Fan/Limit Switch 321894-709 the 940-0001-55 is the directThe Carrier HH12AT008 Fan Limit Switch is a critical safety and operational component designed for intermittent ignition and legacy standing pilot gas furnaces. Engineered to regulate blower motor engagement and provide high limit protection, this bimetal sensing element control ensures the heat exchanger does not exceed safe operating temperatures. As a combination fan limit control, it features adjustable cut in and cut out settings, allowing