the internal thermal disc has failed and requires replacement

this genuine OEM component is critical for maintaining thermal efficiency in Trane units

allowing for flexible installation in either vertical or horizontal orientations

This 4-switch electric heat sequencer features a solid-state 24V heater that provides precise timing for auxiliary contacts

to accommodate shorter stroke lengths

Watts 0556002 Valve the internal thermal disc hasThe Watts 0556002 (Model LFLL100XL 150 3 4) is a lead free transition for the legacy 0066132, engineered specifically for high efficiency water heaters and storage tanks. Designed as a dual function T&P relief valve, it provides autonomous protection against excessive thermal expansion and over pressurization. This model features an extended shank capable of penetrating up to 2 1 2 inches of tank insulation, eliminating the need for additional