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Applying 24V will fail to engage the operator
it is designed for specific fan coil geometries
Using an incorrect rating can cause overheating or failure to start
Technicians should check the motor nameplate for the specific MFD/uF rating to ensure proper torque and motor life
this normally closed model includes a manual operating lever to bypass the motor for system filling or emergency operation
Lennox 12W49 Pressure Switch 320788-703 Applying 24V will fail toThe Lennox 12W49 Pressure Switch (Model R20558702) is a critical OEM safety component engineered for precise combustion air monitoring in Lennox gas furnaces. This SPST pressure switch is factory calibrated to actuate at 1. 35" W. C., ensuring the inducer motor generates sufficient draft for safe venting before the ignition sequence begins. Designed for professional grade reliability, it features a standardized 1 4" barb connection for secure