Description
The Lochinvar & A.O. Smith 100330200 is a genuine OEM flame sensor assembly designed as a direct replacement for compatible Lochinvar and A.O. Smith water heaters and boilers. This complete kit includes the flame sensor rod, mounting gasket, and grommet — everything needed for a clean, accurate installation without the need to source individual components separately.
The flame sensor plays a critical role in the safe operation of your heating equipment. It continuously monitors the presence of a burner flame and sends a signal to the ignition control board to confirm combustion. If the flame is not detected within the trial-for-ignition period, the control board will shut down the burner to prevent unburned gas accumulation — a vital safety function. A worn or contaminated flame sensor can cause nuisance lockouts, intermittent ignition failures, or complete burner shutdowns, making timely replacement essential for reliable system performance.
Key Features
- Genuine OEM replacement part from Lochinvar & A.O. Smith
- Complete assembly includes flame sensor, mounting gasket, and grommet
- Designed for precise fit and reliable flame detection in compatible units
- Gasket and grommet included to ensure a proper seal and vibration-free mounting
- Helps prevent nuisance lockouts caused by a degraded or contaminated sensor
- Supports safe burner operation by accurately confirming flame presence
Application
- Compatible with select Lochinvar and A.O. Smith water heaters and boilers
- Intended as a direct OEM replacement — consult your equipment manual or service documentation to confirm compatibility with your specific model
What’s Included
- Flame sensor rod/probe
- Mounting gasket
- Grommet
For best results, replace the flame sensor as part of routine annual maintenance or whenever ignition lockout codes related to flame sensing are present. Using genuine OEM parts ensures compatibility, longevity, and continued warranty compliance for your Lochinvar or A.O. Smith equipment.
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