Lennox 79J73 Control Limit 321894-709 35" WC trip point ensures

35" WC trip point ensures accurate vacuum sensing and burner safety

this device operates on a fixed temperature differential

the 06DA660065 package typically includes the 1-3/8" shut-off valve

This multi-stage heat sequencer manages the precise activation of 12kW to 15kW heating elements

making it a reliable choice for HVAC pressure switch replacement in commercial and industrial combustion air systems

Lennox 79J73 Control Limit 321894-709 35" WC trip point ensuresWorking with high static environments or Lennox rooftop units requires a manual reset limit switch you can depend on. The Lennox 79J73 Control Limit is a critical safety component designed to monitor discharge air or internal heat exchanger temperatures. When temperatures exceed the calibrated threshold, this high temperature limit switch breaks the 24V control circuit, immediately shutting down the burners or heating elements to prevent catastrophic