Lennox 79J73 Control Limit 321894-709 the switch closes to resume

the switch closes to resume normal heating cycles

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

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

this device operates on a fixed temperature differential

Replacing a failing inducer blower with this factory-authorized assembly helps resolve common furnace issues such as ignition failure

Lennox 79J73 Control Limit 321894-709 the switch closes to resumeWorking 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