Reznor 125189 Indicator Light The 626491R sensor operates by

The 626491R sensor operates by closing a circuit to the defrost control board once the surface temperature drops below the 32°F threshold

High-Heat Durability: Constructed from ceramic and specialized alloy to withstand constant exposure to high-velocity burner flames

use with long flare nuts is recommended to ensure long-term connection integrity

this auto-reset limit switch is designed to monitor internal heat exchanger temperatures directly in the airflow path

Optimized Airflow Management: Functions as a primary control to prevent blower lag and minimize heat exchanger stress

Reznor 125189 Indicator Light The 626491R sensor operates byThe Reznor 125189 Indicator Light is a critical OEM diagnostic component designed for precision signaling within Reznor HVAC control systems. This clear indicator light provides real time visual feedback, allowing technicians to verify operational status or identify fault codes during system troubleshooting. Engineered for industrial grade durability, the 125189 replacement bulb is a direct fit solution that ensures high visibility in gas fired