Lennox Equipment not specified Error Code 36

Priority condition: Service Urgent The system has been heating for at least 15 minutes without a demand for heating. • Run the system in diagnostic mode and verify that it matches actual equipment operation. Go to menu > settings > advanced settings > dealer control center > diagnostics and press the start diagnostics button. • Check for other alert codes that may be preventing the system from operating as expected. • Check all heating equipment to determine cause of heating demand. • Recycle power.