Customer states that the heat pump was not running on his dual fuel system and that only the propane furnace was running. Technician turned up the thermostat 2 degrees and the heat pump came on. Performed function check in heating and auxiliary heating. All systems are operating as they should. Helped customer set a program on his thermostat. Let system run for an hour to see if the problem would present itself. Problem that the customer stated did not occur. System running and heating the home upon departure.