Lochinvar & A.O. Smith 100110849 Upper Probe 318518-761 It is primarily used for

It is primarily used for proving differential air pressure in draft inducer blowers

a failing bypass valve

Can I use RTV sealant instead of this gasket

Precise Multi-Speed Control: Features 4-speed taps to optimize airflow for both heating and cooling cycles

Validated Fitment: Compatible with extensive model series including F8MXL

Lochinvar & A.O. Smith 100110849 Upper Probe 318518-761 It is primarily used forThe Lochinvar & A. O. Smith 100110849 Upper Probe is a critical OEM replacement temperature sensor designed for high recovery commercial gas water heaters. As a direct replacement for part number 9006047205, this NTC thermistor probe provides high accuracy thermal monitoring to the integrated control board, ensuring precise cycling and preventing overheating. This specific upper tank probe is engineered for heavy duty applications, including the A. O.