often caused by a dirty air filter

What Conbraco series do these gaskets fit

High-Temp Composition: Designed to resist degradation from high-temperature exhaust and acidic condensate

This furnace pressure switch is constructed with durable housing and corrosion-resistant terminals to withstand the thermal cycling and moisture typical of condensing furnace environments

Lennox 18K44 Limit Switch Els PW 17895 often caused by a dirtyThe Lennox 18K44 Limit Switch is a high reliability OEM replacement normally closed safety control designed for precise thermal management in residential gas furnaces and air handlers. This auto reset limit switch is engineered to maintain system integrity by monitoring internal plenum temperatures. It is calibrated to an open on rise (cut out) setpoint of 280F to prevent thermal overload and a close on fall (cut in) setpoint of 250F for automatic