If airflow is sufficient and the switch opens below 215°F

It features a technical set point range of 25°F to 75°F with a fixed 2°F differential

providing a clean install that stabilizes the combustion sequence and secures the flame sensing circuit against nuisance trips

serving as a direct replacement for legacy Honeywell PA404A and Pressuretrol models in Weil-McLain configurations

Lochinvar & A.O. Smith 100187881 Ignitor Assembly 320788-703 If airflow is sufficient andThe Lochinvar & A. O. Smith 100187881 Ignitor Assembly is a critical OEM replacement part engineered for high efficiency commercial gas water heaters, specifically the BTH, SUF, and HCG series. As a veteran grade spark ignitor assembly, this component ensures precise ignition timing in 300, 400, and 500 MBH models, as well as 200 201 series units. When troubleshooting water heater ignition failure, the 100187881 is the primary solution for restoring