Lochinvar & A.O. Smith 100112430 Switch THPU32HP7Y you know that a nuisance

you know that a nuisance lockout is often traced back to a fouled or failing flame rectification circuit

This is a specific Bradford White replacement part

2-stage 24V spark ignition control designed for precise combustion management in residential and light commercial gas furnaces

but the system fails to transition to the heating cycle

5W running

Lochinvar & A.O. Smith 100112430 Switch THPU32HP7Y you know that a nuisanceThe Lochinvar & A. O. Smith 100112430 Switch is a factory specified blocked inlet pressure switch designed to maintain critical safety standards in high efficiency boilers and water heaters. As a direct OEM replacement part, this component is calibrated to monitor the combustion air inlet for obstructions. When the 100112430 pressure switch detects a restriction in airflow that could lead to incomplete combustion or hazardous venting conditions, it