Lennox 18M84 Limit Switch Els PW 17895 ensuring the flue collector box

ensuring the flue collector box maintains proper negative pressure before allowing the ignition sequence to proceed

6mm OD tubing

birth defects

Designed with a rugged NEMA 3R metallic enclosure

High-Accuracy Detection: Utilizing a tri-color crystal element

Lennox 18M84 Limit Switch Els PW 17895 ensuring the flue collector boxProfessional 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