which may bypass safety limits or prevent the heater from firing entirely

and light oils with a 5

Verify 24 VAC at the R terminal

this switch is rated for 13A resistive and 2

while single-acting operation is ideal for solid fuels like wood or coal

Lochinvar & A.O. Smith 100265150 Ignitor 318820-201 which may bypass safety limitsThe Lochinvar & A. O. Smith 100265150 Ignitor is a critical OEM replacement component engineered specifically for high output FB 1501 2001 gas boiler models. As a veteran grade hot surface igniter (HSI), this part provides the consistent electrical discharge required to initiate combustion within the burner assembly. This specific Lochinvar 100265150 kit includes the necessary high temperature gasket to ensure a pressurized seal, preventing flue gas