Lochinvar & A.O. Smith 100165932 Spark Ignitor 321894-709 Anti-Scaling Algorithm: Advanced internal logic

Anti-Scaling Algorithm: Advanced internal logic prevents setpoint overshoot

Check for glazing on the sidewalls

The H43AB-4 and the H43AB-4C are identical in form

ensuring a leak-proof seal in the field

Common Questions: Is the Trane MOT18975 compatible with MOT2611

Lochinvar & A.O. Smith 100165932 Spark Ignitor 321894-709 Anti-Scaling Algorithm: Advanced internal logicWhen you're dealing with a heater that will not fire, the Lochinvar & A. O. Smith 100165932 Spark Ignitor is a critical diagnostic starting point. This genuine OEM replacement part is engineered for high voltage ignition sequences in Lochinvar EnergyRite Heaters, specifically models ER 152, ER 202, ER 252, ER 302, and ER 402. As a field ready HVAC ignition component, it provides the precise 10,000 to 15,000 volt arc required to bridge the gap and