Tech found thermostat satisfied upon arrival. Tech cycled system multiple times and found no issues. Tech found no issues with any thermostat wire connections. Tech found no flame travel issues. Tech did find gas set too high at 4.08 and adjusted to 3.5 for natural gas. System is heating properly at this time. Temperature increased from 70 to 73 while tech was diagnosing. Customer stated there has been no issues this week. Tech uploaded photos for inspection.