Williams P323379 Limit Switch 4" WC spec to ensure

4" WC spec to ensure the combustion air pressure switch is reacting correctly to the inducer motor’s vacuum

and Coleman residential systems

This HVAC pressure switch is a critical safety component designed to verify proper blower motor operation and adequate venting airflow before allowing the ignition sequence to proceed

reducing nuisance service calls

and Broan heating equipment

Williams P323379 Limit Switch 4" WC spec to ensureThe Williams P323379 Limit Switch is a critical safety component designed for high limit temperature monitoring in gas furnaces and heating units. Featuring a 330F CO temperature rating, this manual reset vent limit switch ensures that the combustion system shuts down immediately if internal temperatures exceed safe operating parameters. As an OEM Williams replacement part, it provides precise overheat protection to prevent heat exchanger damage and