Lennox 56W63 Rollout Switch

The Lennox 56W63 Rollout Switch is a critical safety component designed for high-temperature monitoring in residential and commercial gas furnaces. This 400 degrees F limit switch serves as a reliable flame rollout sensor, engineered to interrupt the electrical circuit immediately if a rollout condition—where flames escape the heat exchanger—is detected. As a Single Pole Single Throw (SPST) device, it features a normally closed configuration that opens upon reaching its fixed setpoint of 400°F. The manual reset rollout switch design ensures that once the thermal limit is tripped, a technician must physically inspect the heat exchanger and burner assembly for blockages or cracks before restoring operation. This OEM part is a direct Lennox 56W6301 replacement, ensuring exact physical fit and electrical compatibility with Lennox furnace safety parts across various model lines, including the CG80 series. Built for durability in high-cycle environments, this HVAC thermal limit switch provides precise 400-degree protection to prevent equipment damage and ensure safe combustion cycles.

• Critical Safety Protection: Open-on-rise action at 400°F prevents hazardous furnace operation during secondary heat exchanger failures or flue blockages.
• OEM Compatibility: This genuine Lennox 56W63 is identical to part number 56W6301, offering seamless integration without field modifications.
• Manual Reset Mechanism: Forces a professional system diagnosis following a trip, enhancing long-term site safety and preventing repetitive cycling under fault conditions.
• Technical Precision: SPST switch logic provides definitive circuit interruption for standard 24V control strings used in most Lennox gas heating units.

Is the Lennox 56W63 a manual or automatic reset?
This is a manual reset rollout switch. Once the temperature exceeds 400°F and the switch opens, it must be manually depressed to close the circuit after the temperature drops and the underlying cause is resolved.

When should I replace a flame rollout switch?
Technicians should replace the switch if the internal bi-metal disc fails to reset, if there is visible scorching on the terminals, or if the switch does not maintain continuity below the 400°F threshold.

Will the 56W63 replace the 56W6301?
Yes, these parts are technically identical. The 56W63 is the standard replacement for the 56W6301, maintaining the same 400-degree setpoint and SPST configuration.

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.