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Note that this snap-action switch is not interchangeable with older Series 42 mercury switches or Series 150S assemblies
Normally Open Fail-Safe: The N/O configuration is ideal for heating applications where maintaining flow during a signal failure is a safety priority
low-resistance interface between the HVAC control board
Whether you are dealing with a hard-starting compressor or a complete failure to engage in a heat pump or AC system
and Payne residential and commercial models
Williams P500409 Wire 319847-401 Note that this snap-action switchProfessional grade furnace maintenance requires exact electrical specifications, and the Williams P500409 Wire Assembly delivers the necessary conductivity for high demand heating systems. This OEM wire harness is engineered specifically for the Williams Vented Hearth Heater series, ensuring a precise match for internal circuitry. Designed to facilitate consistent power distribution and signal integrity, the P500409 is a critical component for
