OEM Lennox Combustion Blower Relay — 28G38

The genuine OEM Lennox 28G38 combustion blower relay switches electrical power to the draft inducer during the furnace's ignition sequence. Acting on a signal from the control board, this relay energizes the inducer to establish combustion airflow and prove draft before the burners light, making it an essential link in your Lennox furnace's safe startup process.

A failing relay often causes intermittent no-heat calls, a furnace where the inducer won't start or won't stop, chattering contacts, or a burnt smell near the control area. Because relay contacts wear and pit over time, symptoms can be erratic—working one cycle and failing the next—which frequently leads to hard-to-diagnose lockouts.

Installing the OEM Lennox 28G38 ensures the correct coil voltage, contact rating, and terminal configuration your furnace requires. Generic relays with mismatched ratings can weld shut, fail early, or disrupt the ignition sequence. A factory-matched combustion blower relay restores reliable switching and keeps your Lennox equipment starting safely every cycle.