000 BTU systems

always cross-reference the nameplate on your existing valve body or consult our technical team

dirty blower wheel

Technicians typically see intermittent ignition failures

The motor is rated for CCWLE (Counter-Clockwise Lead End)

Lennox 56M04 Pressure Switch 320819-301 000 BTU systemsEnsure your combustion system operates within precise safety parameters with the Lennox 56M04 Pressure Switch. This genuine OEM . 55" WC pressure switch is a critical safety component designed to monitor the draft inducer motor's performance, ensuring the flue remains clear and the vacuum pressure is sufficient for a safe ignition sequence. Engineered for high efficiency Lennox gas furnaces and air handlers, this switch features a single pole single