Lennox Error Code 65541

Priority condition: Information Only-Dealer • Download for firmware failed. • Typically the thermostat will send a command to the unknown device and place it in a soft disable state. The Lennox communicating control with the soft disable state will indicate so as follows: • On air handler, furnace and outdoor controls, the state is displayed by double horizontal lines on seven-segment display. • On the damper control module, the green LED will blink three seconds on and one second off. • On the equipment interface module, the green LED will blink three seconds on and one second off. Cycling power to the soft disabled control may clear the condition. If cycling power does not clear the soft disable state then replace control.