preventing premature motor failure and optimizing heat transfer across the exchanger or coil

the valve must be installed in a vertical

Technicians should check for continuity and resistance

The 325 psi max bellows overpressure rating provides a necessary safety margin for high-side surges

Laars Heating Systems 2400-110 Stack Switch 320735-701 preventing premature motor failure andThe Laars Heating Systems 2400 110 Stack Switch is a critical exhaust temperature sensor designed for commercial and residential boiler systems. As an OEM Laars replacement part, this bimetallic stack relay monitors flue gas temperatures to provide essential furnace safety control. Engineered specifically for Mark II H Series (sizes 60 130) and Mark II 9600 models (HWG & CB, sizes 150 250), it ensures the burner only operates when a safe draft and