Discoloration of the metal

A built-in SPST auxiliary switch provides an end-switch closure to signal the burner or circulator relay once the valve is fully open

The hardware features a durable Noryl gray enclosure and conformal-coated circuitry to withstand high-humidity environments and mechanical vibration

Always measure the active fin area

this round-style component provides the necessary phase shift for both the compressor and the outdoor fan motor

Lochinvar & A.O. Smith 100208666 Cutoff Freon Discoloration of the metalThe Lochinvar & A. O. Smith 100208666 Low Water Cutoff Manual Reset is a critical safety component designed to protect high efficiency hydronic systems. As a direct OEM replacement part for WTR2530 and WTR2530K, this probe type LWCO sensor ensures the burner circuit remains de energized during low water conditions, preventing catastrophic heat exchanger failure or "dry firing." Engineered specifically for the Lochinvar Power Fin series (models PB PF