Laars Heating Systems V0049900 Valve 323080-701 This heavy-duty furnace interlock switch

This heavy-duty furnace interlock switch is a critical safety component designed to instantly cut power to the blower motor and control board when the furnace access panel is removed

Unlike standard mechanical floats

making it a staple for contractors maintaining legacy pneumatic control systems

using genuine OEM HVAC parts is strongly recommended to ensure the safety and performance specifications of your specific system are met

fitting standard York control compartment mounting patterns

Laars Heating Systems V0049900 Valve 323080-701 This heavy-duty furnace interlock switchThe Laars Heating Systems V0049900 Valve is a 1 inch, 24V combination natural gas control designed for high demand hydronic applications. This OEM Laars replacement part is engineered specifically for Mighty Therm boiler models, specifically the 325 400 series (including HH, PH, VW, and PW configurations). Operating with a 4" WC manifold pressure, this valve ensures precise fuel regulation and consistent ignition cycles in commercial and residential