Lennox 56M13 Control Limit

The Lennox 56M13 Control Limit is a critical high-temperature safety component engineered for precision in gas furnace and HVAC system applications. This SPST (Single Pole Single Throw) switch provides indispensable protection by monitoring heat exchangers and duct temperatures, ensuring reliable safety shutoff during overheating events. This specific Lennox limit switch is often identified as 56M1301, confirming precise OEM replacement compatibility for contractors servicing Lennox and Allied units.

Operating with a normally closed configuration, the 56M13 is designed to actuate at 280°F (open) and feature an automatic reset once temperatures drop to 250°F (close). For professional installation, this STILT limit control features a 3-inch insertion length (OAL) and a distinctive white sleeve for quick identification in the field. Its robust construction ensures it withstands high-cycle environments without drifting from its thermal setpoints, maintaining the furnace high limit switch integrity required by modern safety standards. This component is compatible with popular models such as the G43UF and G51MP series, offering a direct drop-in solution for HVAC replacement parts.

• Precise Thermal Calibration: Engineered with a fixed 280°F trip point and 250°F reset point for consistent high-temperature monitoring.
• OEM Direct Compatibility: Fits a broad range of Lennox and Allied heating equipment, cross-referencing directly to part number 56M1301.
• Streamlined Installation: Compact 3-inch probe and SPST switch design allow for fast integration into existing safety circuits.
• Industrial-Grade Construction: Built to meet OEM quality standards for long-term cycling in demanding furnace environments.

• Is the Lennox 56M13 a manual or automatic reset? This limit switch is designed with an automatic reset that closes the circuit once the plenum cools to 250°F.
• What does the white sleeve on the 56M13 indicate? The sleeve is a color-coded identifier for specific temperature ratings used by technicians to verify the correct limit range during service.
• Can I use 56M1301 as a replacement? Yes, the 56M13 and 56M1301 are technically identical parts and are interchangeable in all specified applications.

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.