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Chrome-bevel sheet on grid paper — specs and return notes filed under the bay.
or ignition lockout
the internal relay or circuitry has likely failed
Will this fit in a standard 14-inch furnace cabinet
Field technicians will appreciate the precision fit for 5-ton FX4
Lennox 12M92 Pressure Switch 320735-701 or ignition lockoutThe 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