OEM Lennox Limit Switch — 98G46

The genuine OEM Lennox 98G46 limit switch is a critical safety control that monitors the temperature inside your Lennox furnace's heat exchanger compartment. If the unit overheats, the switch opens and shuts down the burners to protect the heat exchanger and prevent a hazardous condition, making it one of the most important safety devices in the system.

Common symptoms of a failing limit switch include a furnace that short-cycles, the blower running continuously, no heat despite the burners igniting, or the system tripping off shortly after startup. A switch stuck open will prevent heating entirely, while one that fails to open removes vital overheat protection.

OEM is essential for a safety component like this. The 98G46 is calibrated to the precise trip temperature your Lennox furnace requires and fits the original mounting location exactly. Aftermarket switches with incorrect temperature ratings can allow dangerous overheating or cause nuisance shutdowns. Protect your equipment and your home by installing the genuine Lennox part.