it is intended to slide into different well sizes commonly found in legacy installations to provide a snug fit for the sensing bulb

Technicians typically look for a "clicking" sound without motor engagement

For systems requiring a higher amperage draw

For most compatible M&M series

What is the difference between 29M85 and 29M8501

York S1-025-27792-708 Limit Switch it is intended to slideThe 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