| Button | Symbol | Function | | :--- | :---: | :--- | | | ▲ | Increases values; scrolls forward through menus. | | Down | ▼ | Decreases values; scrolls backward through menus. | | Set | SET | Views/accepts parameters; enters programming mode. | | Defrost | ❄️ (or circle) | Manually triggers a defrost cycle. | | Standby | ⏻ | Turns controller On/Off (if held for 3-4 secs). |

Sometimes you need to change deeper settings, like the differential (hysteresis) or defrost intervals.

The face of the controller generally consists of a 3-digit display and four navigation buttons.