Temperature controller for refrigeration (frozen and chilled goods) or heating applications. It has an internal audible alarm (buzzer) and a configurable digital input to detect an open door and/or external alarm/power fault. It performs a natural defrost by stopping the compressor if configured for chilled goods. Output 2 offers the option of functioning as a NC contact of output 1, as a temperature alarm, or to activate a forced defrost (when used for frozen goods). Another available resource is the disconnection of the control functions, allowing for the MT-514E to act only as a temperature indicator. Additionally, through an intelligent function locking system, it prevents unauthorized people from changing the control functions.