For most compatible M&M series

The limiter is primarily designed to restrict the total stroke of the Belimo LF by providing a physical stop on the housing

For systems requiring a higher amperage draw

What is the difference between 29M85 and 29M8501

While the 145F open/105F close specs are standard for many SPST rollout switches

York S1-025-27792-708 Limit Switch For most compatible M&M seriesThe York S1 025 27792 708 is a high precision 170F M R Limit Switch engineered for critical high limit protection in residential and light commercial HVAC furnaces. As a safety critical auxiliary limit switch, this manual reset component monitors internal heat exchanger temperatures, providing a fail safe cutoff to prevent dangerous overheating if airflow is restricted or the primary limit fails to trip. Designed to fit York P2DPD12N06401A models and