Pay in 4 interest-free payments of $9.94 Learn more
Ships within 48 hours · Estimated delivery Sep 3 - Sep 8
For technicians troubleshooting hydronic mixing control issues
helping contractors distinguish between mechanical failure and electrical coil issues
the Bard 9043-411 is designed for continuous duty cycles in demanding commercial environments
For technicians performing burner repair or preventative maintenance
Lennox 59W40 Proving Switch 321702-401 For technicians troubleshooting hydronic mixingThe Lennox 59W40 Blower Proving Switch is a critical safety component designed for specific Lennox furnace models and air handling units. This negative pressure switch is calibrated to a precise . 15" WC setpoint, ensuring the inducer motor or blower assembly is generating sufficient draft before allowing the ignition sequence to proceed. As a genuine Lennox replacement part, the 59W40 ensures seamless integration with the existing control board
US$ 55.00
US$ 22.00
US$ 65.00
US$ 150.00
US$ 24.99
US$ 28.00