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

birth defects

this unit is the industry-standard replacement

When you are opening up a Lochinvar Copper-Fin II or EnergyRite unit for a heat exchanger teardown

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