measure the resistance across the sensor leads and compare the value against a standard 10K Type II resistance chart relevant to your ambient temperature reading

or a restricted chimney flue rather than a mechanical defect in the switch

True OEM Compatibility: Guaranteed to match original equipment dimensions and electrical requirements for specialized Aaon units

10" WC set points

Maxon 1089465 Flame Sensor R-410A measure the resistance across theThe Maxon 1089465 Flame Sensor is a precision engineered industrial component designed for reliable flame monitoring in high demand combustion systems. Featuring an integrated Rajah E9 SSN connector, this sensor ensures a secure, high tension electrical connection, mitigating signal loss in harsh environments. As a critical industrial burner flame safeguard, it provides instantaneous flame detection to prevent hazardous fuel buildup in boilers,