Lennox Equipment not specified Error Code 12

Priority condition: Service Urgent Thermostat did not find an indoor unit. Make sure there is an Lennox communicating indoor unit on the system. • Check for voltage and missing component. • Check R, i+, i- and C connections at mag-mount or subbase, smart hub and all attached communicating components. • Ohm wires for electrical continuity. • Cycle power to both indoor unit first and then thermostat. • Verify that equipment interface module (if applicable) is configured as either an air handler or furnace when used with a non-communicating indoor unit. • Go to menu > settings > advanced settings > view dealer control center > equipment and press reset all equipment. This will allow the system to auto-detect any Lennox communicating components attached. • Replace indoor unit control if there is no response.

Touch either done to clear the reminder or remind later button.