Lennox 56M13 Control Limit the 10-210 specifically accommodates 1/4-inch

the 10-210 specifically accommodates 1/4-inch tubing but is often versatile enough for 3/16-inch applications with the correct compression fittings

This model is the direct replacement for 43-25133-05

the 11951 features compact dimensions of 1-3/4 inches in diameter by 3-3/8 inches in height

Broad Thermal Range: Precision calibrated for 180-210F temperature rating to protect the heat exchanger from overheating

This furnace high limit switch features a 170

Lennox 56M13 Control Limit the 10-210 specifically accommodates 1/4-inchThe 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