Reliability at this vacuum threshold is essential to ensure the combustion air blower is clearing exhaust gases effectively before the ignition sequence begins

What causes this limit switch to fail or trip frequently

the Reznor 146465 is specifically calibrated for the airflow requirements and heat rise of Reznor unit heaters

High Power Capacity: Supports up to 1 HP at 120 VAC and 2 HP at 240 VAC

Robertshaw 695-200 Control Board 30067439-890 Reliability at this vacuum thresholdThe Robertshaw 695 200 is an Integrated Furnace Control Board engineered for direct replacement of Rheem HSI (Hot Surface Ignition) systems. Designed for heavy duty HVACR applications, this board provides microprocessor supervised management of the ignition sequence, inducer draft motor, and blower operations. It is a drop in replacement for common OEM part numbers, including 62 24268 01, 62 24268 02, and 62 24268 03. This furnace circuit board