Lochinvar & A.O. Smith 100165930 Flame Sensor

The Lochinvar & A.O. Smith 100165930 Flame Sensor is a critical OEM replacement part engineered for precise flame rectification in high-efficiency heating systems. Designed specifically for the Lochinvar Knight series, including WH 55 through WH 399 and KH 55-285 fire tube boilers, this sensor accurately detects the burner flame to maintain combustion safety and fuel efficiency. It is a direct genuine OEM substitute for the PLT3022 and includes a high-temperature flame sensor gasket to ensure a gas-tight seal at the mounting plate. Common failure symptoms, such as the boiler cycling off shortly after ignition or "Ignition Failure" fault codes, often indicate a fouled or oxidized probe. Transitioning to a new 100165930 sensor restores reliable signal feedback to the smart system control, preventing nuisance lockouts and ensuring optimal performance across compatible A.O. Smith and Lochinvar hydronic applications.

Key Benefits:

• Direct Cross-Reference: Identical to PLT3022, ensuring a perfect fit and electrical compatibility with original factory specifications.
• Complete Installation Kit: Ships with the required mounting gasket and hardware to prevent combustion leaks during replacement.
• Broad Compatibility: Verified for use in Lochinvar Knight WHN, KHB, and AW series boilers and water heaters.
• Accurate Rectification: Provides high-sensitivity flame detection to prevent the control module from cutting the gas valve during operation.

Common Questions:

Is the 100165930 the same as the PLT3022?
Yes, these part numbers are interchangeable. The 100165930 is the updated Lochinvar flame sensor part number for the older PLT3022 designation.

What causes a flame sensor to fail in a Knight boiler?
Over time, the probe can develop carbon buildup or oxidation, which acts as an insulator and prevents the flow of the ionization current. If cleaning the rod does not restore a signal of at least 10 microamps, replacement is required.

Does this part include the gasket?
Yes, this flame sensor with gasket kit includes the necessary seal. Reusing an old gasket is not recommended as it may cause exhaust or fuel leaks at the burner plate.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.