Lochinvar & A.O. Smith 100110832 Sensor

The Lochinvar & A.O. Smith 100110832 Sensor is a critical safety component designed for Flammable Vapor Ignition Resistant (FVIR) water heaters. This replacement flammable vapor sensor, formerly identified as 184854-000 or 9005973205, monitors atmospheric conditions near the water heater burner. If combustible concentrations of gasoline or other vapors are detected, the sensor triggers a system lockout to prevent ignition. This assembly includes the mounting bracket for precise positioning, ensuring the thermistor-based element remains within the correct detection zone. Designed for high compatibility with residential gas water heaters, this FVIR safety sensor is essential for maintaining the integrity of the combustion cycle. When troubleshooting water heater lockout codes or an open circuit fault, verifying the resistance of the sensor is a standard diagnostic step for field technicians. This OEM part ensures the system operates within original manufacturing tolerances for vapor detection and thermal response time.

• OEM Compatibility: Direct replacement for A.O. Smith, Lochinvar, State, and Reliance gas-fired units.
• Enhanced Safety: Primary defense against flammable vapor ignition in residential mechanical rooms.
• Integrated Bracket: Factory-spec mounting ensures the sensor captures airflow at the precise intake point.
• Direct Signal Integration: Communicates immediately with the gas control valve or ignition module.

What causes a flammable vapor sensor to trip?
The 100110832 sensor is highly sensitive to gasoline, paint thinners, and solvent vapors. If these materials are stored near the unit, the sensor will trigger a permanent lockout for safety.

Can the 100110832 sensor be reset?
Once the sensor has detected a flammable vapor event or has failed electrically, it typically requires replacement. Attempting to bypass this component is a significant safety risk and is not recommended.

How do I confirm this is the right part for my water heater?
Match this part number against your unit's model and serial number or verify the part number located on the original sensor bracket.

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.