Controllers and systems for displaying servicing information via a display unit are disclosed. A controller in accordance with an illustrative embodiment of the present invention may include an interface for programming a service event display mode in the controller, and a display unit configured to display servicing information when a service event is detected by the controller. An event such as the triggering of a service indicator or the expiration of an equipment service event timer may cause the controller to display servicing information on the display unit, informing the user that servicing may be necessary or is recommended.