Common Questions What causes the 100109916 limit control to trip

Ensure the flame rollout sensor is correctly positioned according to the manufacturer's layout

ensuring a perfect shaft fit and pitch

Versatile Compatibility: Mounts directly to standard round or square shafts

Which systems are compatible with this spline wrench

Lennox 12M92 Pressure Switch THPU32HP7Y Common Questions What causes theThe Lennox 12M92 Pressure Switch is a critical genuine OEM furnace safety component designed for specific Lennox gas furnaces and heating units. This combustion air pressure switch is factory calibrated to activate at 0. 70" WC (inches water column), ensuring the inducer motor is generating sufficient draft before the ignition sequence begins. As a furnace pressure switch replacement, the 12M92 monitors for venting obstructions or mechanical failures