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we recommend retaining the original hardware or sourcing grade-appropriate fasteners for the final assembly
verify the dip switch settings on the top left of the module to match your system's temperature range
The assembly includes a Style 4 sensing bulb (11/16" diameter by 3-1/4" length) and a 6-foot capillary for flexible positioning in demanding mechanical rooms
Built for durability in commercial fan coil systems
Durable Construction: Built to withstand the high ambient temperatures common in the upper housing of gas-fired unit heaters
Williams P321942 Limit Switch 322027-701 we recommend retaining the originalThe Williams P321942 Limit Switch is a critical OEM safety component engineered for Williams Forsaire Direct Vent Wall Furnaces and 6007 Series counterflow units. This temperature sensitive switch, classified as an L210 40F limit switch, monitors plenum air temperature to prevent heat exchanger damage and hazardous overheating conditions. As a technical HVAC replacement part, it is designed with a normally closed contact configuration that opens the
