5' A99BB-600C temperature sensor to ensure maximum accuracy and full compatibility with the updated electronic circuitry

Field Serviceable: The internal piston and seat assembly are accessible for cleaning or replacement without removing the valve body from the line

a standard requirement for residential Forsaire installations

preventing catastrophic equipment damage or fire hazards

ensuring consistent water temperature regulation between 90°F and 160°F

Lennox 89M57 Gas Valve Freon 5' A99BB-600C temperature sensor toThe Lennox 89M57 is a critical OEM replacement gas valve designed for single stage heating legacy systems. This 24V gas valve is factory configured for natural gas with a 3. 5" WC manifold pressure setting, though it often includes a propane conversion kit for versatile field application. Engineered for precision, the unit features a 1 2" NPT inlet and outlet, ensuring a direct fit for standard gas manifold assemblies. As a veteran grade HVAC