if the original sensor has drifted and is not "opening" at the 60°F threshold

this 1" NPT valve is engineered to simplify ASME CSD-1 code-mandated testing of low water cut-offs (LWCO)

you must match the 1HP rating and the specific Trane part number to ensure the internal programming matches your cabinet's CFM requirements

the internal bimetal disc has likely failed and requires replacement

and 58MCB Carrier furnace lines

Heil Quaker ICP 34335004 Limit Switch 321702-401 if the original sensor hasUpgrade your system reliability with the Heil Quaker ICP 34335004 Limit Switch, a precise OEM replacement engineered for high performance thermal regulation. Designed specifically for Heil, Quaker, and International Comfort Products (ICP) furnace units, this automatic reset limit switch is a critical safety component that monitors heat exchanger temperatures to prevent thermal overload. When the internal plenum temperature reaches its 110? F set