How do I enable and use the Service Mode on the TC300?

To enable Service Mode, navigate to Configuration > Advanced > Service Mode and tap YES. Service Mode disables all control algorithms and allows you to manually test terminals and equipment output by connecting test equipment to relevant terminals. Different options display based on your terminal configuration (single/two-speed fan, heating, cooling, auxiliary heat, modulating equipment, etc.). To exit Service Mode, tap the back arrow button on the Service Mode screen and confirm YES. (Pages 77-79)