High Pressure Rating: 600 psi body pressure rating ensures robust performance under significant system pressures

consolidating the functions of the legacy 5H75028 terminal board and 5H75039 time delay relay into a single

or the system failing to initiate the pre-purge cycle

For service technicians managing high-capacity HVAC systems

this component maintains the specific CFM curves required for original equipment performance levels

Lochinvar & A.O. Smith 100166232 Pressure Switch 328140-751 High Pressure Rating: 600 psiThe Lochinvar & A. O. Smith 100166232 Pressure Switch is a critical safety component designed for precise atmospheric monitoring in high efficiency boiler and water heater systems. Engineered with a 1. 05" WC fixed set point, this SPDT (Single Pole Double Throw) switch ensures the inducer motor is generating sufficient negative pressure to safely vent combustion gases before allowing the ignition sequence to proceed. As a direct OEM replacement part,