OEM Lennox Fan and Limit Control — 13P95

The genuine OEM Lennox 13P95 fan and limit control manages two critical functions in your Lennox furnace: it energizes the blower once the heat exchanger reaches temperature and it acts as a high-limit safety that shuts off the burners if the plenum overheats. This dual-purpose control protects the heat exchanger from thermal damage while ensuring warm, comfortable airflow is only delivered when it should be.

Common signs of a failing fan and limit control include a blower that never starts or runs constantly, a furnace that short cycles on the limit, no heat despite an active burner call, or a unit that trips out on high temperature. A worn or out-of-calibration control can allow dangerous overheating or leave you without heat entirely.

The OEM 13P95 is built to the exact temperature setpoints and mounting specifications Lennox engineered for its furnaces, so the fan-on, fan-off, and limit trip points match factory design. Generic replacements risk incorrect calibration that compromises both comfort and safety. Installing the factory part restores proper sequencing and preserves your equipment warranty.