Lennox 18M84 Limit Switch Els PW 17895 This "slug" of cool water

This "slug" of cool water acts as a physical barrier

it is a universal mechanical linkage component frequently used in Johnson Controls pneumatic and electronic actuator systems to bridge the drive shaft and the damper blades

persistent oxidation or cracks in the porcelain insulator necessitate a full replacement to ensure reliable furnace ignition

Simplified Calibration: Open setpoint slot allows for easy adjustments while the cover remains secured to the backplate

helping to maintain stable superheat and preventing liquid slugging at the compressor

Lennox 18M84 Limit Switch Els PW 17895 This "slug" of cool waterProfessional grade Lennox 18M84 limit switches are critical safety components designed to regulate internal furnace temperatures and protect heat exchangers from thermal stress. This OEM Lennox limit control features a 3 inch insertion depth and is factory calibrated for an auto reset range of 230 260F. As a normally closed switch, it breaks the electrical circuit to the gas valve if the plenum temperature exceeds the 260F threshold, typically caused