Soft Disable — Control not communicating

What does Double horizontal lines on seven segment display mean?

Double horizontal lines shown on the seven-segment display of an air handler, integrated furnace, or outdoor control indicate that the control has been put into a soft disable mode. This usually happens when the system detects an unknown or unconfigured device.

• Control replaced and needs reconfiguration
• New device detected on the system
• Existing device not communicating with the thermostat

Click steps to track your progress.

1. 1

   Confirm all wiring between devices, including the thermostat and Smart Hub, is secure.

2. 2

   Cycle power to the Lennox system by turning it off at the breaker for 30 seconds, then back on.

3. 3

   Navigate to the thermostat menu: > settings > advanced settings > view dealer control center.

4. 4

   Select 'Equipment', then 'Reset', then 'Re-configure system' and confirm.