Reznor 131450 Cut Off

The Reznor 131450 Energy Cut Off (ECO) is a mission-critical safety limit designed for industrial and commercial gas-fired unit heaters. This OEM safety device functions as a fail-safe by monitoring internal temperatures and automatically interrupting the heating cycle if conditions exceed 152°C (306°F). In the field, a tripped ECO often indicates airflow obstructions, incorrect gas pressure, or restricted venting—preventing catastrophic equipment damage by breaking the electrical circuit to the fuel supply or burner controls.

Built for the rigors of mechanical rooms and warehouses, the 131450 features a robust bimetal thermal disc that responds to over-temperature protection requirements. As a direct HVAC replacement part, it ensures your Reznor units maintain compliance with safety regulations without the nuisance tripping associated with lower-quality aftermarket alternatives. Whether you are troubleshooting a unit that is short-cycling or addressing a manual reset lockout, installing a genuine Reznor ECO switch is the standard for restoring high-limit circuit integrity.

• Precision Safety Monitoring: Engineered to trip at a calibrated 152°C (306°F) to protect the heat exchanger and burner assembly.
• OEM Compatibility: A direct-fit Reznor 131450 replacement for a broad range of gas-fired heaters, ensuring consistent electrical ratings.
• Automatic Interruption: Instantly disconnects energy flow during thermal anomalies to mitigate fire risks and equipment fatigue.
• Contractor-Grade Durability: Constructed to withstand the high-cycle demands of commercial HVAC environments.

How do I know if the ECO switch has failed or just tripped?
Perform a continuity test with a multimeter across the terminals. A functional Reznor high limit switch should show zero resistance (normally closed) at room temperature. If it reads O.L. while cool, the internal thermal fuse or disc has reached its end of life and requires a swap.

What causes a Reznor 131450 to trip frequently?
Common culprits include a clogged air filter, a failing blower motor, or restricted exhaust venting. These issues cause internal cabinet temperatures to spike, forcing the energy cut-off to protect the system.

Is this a manual or automatic reset device?
This specific limit control is designed as a safety cut-off. Depending on the specific unit heater model, it may require manual intervention or a complete power cycle to reset once the temperature drops below the strike point.

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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.