Lochinvar & A.O. Smith 100097250 Flame Sensor

As a veteran tech, you know that a systematic lockout on a high-efficiency boiler or water heater often points directly to a fouled or failing Lochinvar & A.O. Smith 100097250 Flame Sensor. This genuine OEM PSE-GW1 flame sensor is a mission-critical component designed for precise flame rectification. It accurately monitors the microamp signal produced by the burner's ionized gas, ensuring the ignition module maintains the gas valve circuit only when a stable flame is present. Without a reliable 100097250 flame sensor, you’ll encounter intermittent "no-flame" errors or complete system shutdowns, particularly during high-demand cycles.

Constructed with a high-grade alumina ceramic insulator and a durable Kanthal sensing rod, the PSE-GW1 is built to withstand the intense thermal stress inside the combustion chamber. This part is a direct replacement for various residential and commercial units, providing the OEM flame detection accuracy required to meet factory safety specifications. When you're troubleshooting a water heater flame sensor that won't hold a signal, replacing it with a fresh 100097250 ensures optimal combustion efficiency and prevents dangerous unburned gas accumulation.

• Ensures consistent flame rectification to prevent nuisance ignition lockouts.
• Direct-fit OEM replacement part for Lochinvar and A.O. Smith equipment.
• High-temperature ceramic body prevents electrical leakage to ground.
• Restores the necessary microamp signal for reliable ignition module communication.
• Rugged construction designed for long-term exposure to burner heat.

• How do I check if my flame sensor is bad? Hook up your multimeter in series with the sensor wire and set it to DC microamps (µA). If the reading is below the manufacturer's threshold (typically < 1.0 µA), the sensor is likely fouled or cracked.
• Can I clean the 100097250 sensor instead of replacing it? You can temporarily clean the oxidation with a light abrasive if the rod is intact, but carbon buildup or microscopic cracks in the ceramic will eventually cause the signal to fail again. Replacement is the professional standard.
• Why does my boiler lock out only on cold starts? A weak signal often manifests during the initial ignition phase. Replacing the old sensor ensures the flame signal is strong enough for the controller to stay out of lockout mode even in demanding conditions.

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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.