Lennox 59W40 Proving Switch THPU32HP7Y reducing manual intervention on service

reducing manual intervention on service calls

Common Questions Does this kit work with the smaller 1/2" VG7000 valves

Common Questions Is the HB32GQ230 compatible with my Bryant or Payne unit

Safety Monitoring: Prevents the accumulation of combustion gases by detecting blocked flue or inlet conditions

corroded units

Lennox 59W40 Proving Switch THPU32HP7Y reducing manual intervention on serviceThe Lennox 59W40 Blower Proving Switch is a critical safety component designed for specific Lennox furnace models and air handling units. This negative pressure switch is calibrated to a precise . 15" WC setpoint, ensuring the inducer motor or blower assembly is generating sufficient draft before allowing the ignition sequence to proceed. As a genuine Lennox replacement part, the 59W40 ensures seamless integration with the existing control board