Lennox 18M84 Limit Switch Els PW 17895 it is a universal mechanical

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

eliminating the need for field-modified universal gaskets

a 120-ohm resistor should be terminated across terminals 1 and 2 of the 5-wire connector to prevent signal reflection

blocked return registers

Lennox 18M84 Limit Switch Els PW 17895 it is a universal mechanicalProfessional 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