Operating Controls

To access the controls, the bottom, front panel must be removed by pulling out on one corner of the panel and unsnapping it from the clips.

HEC 103 and HEC 104

HEC 123 and HEC 124

Item No. Display Name Description

-

Power switch A rocker switch that sends electrical current to the operating components when turned on.
1

Digital Display

Shows the cabinet temperature, error codes and the selections in the Program Modes.

2

Base heat Press to set the base heat value and to toggle through the Program Mode.
3

Shelf button Lights when the heat is on for that particular shelf Press and hold to set the corresponding shelf heat value; ex: press and hold shelf button 1 to set the heat value of the bottom shelf; the shelf buttons, 1 to 4, are also used in the Special Program Mode to turn on and off the heat outputs for each shelf.
4

Up arrow button and Down arrow button

Used to set the heat values of the shelves and base; press and hold, while turning on power switch to enter the Special Program Mode; used in Special Program Mode to turn off and on heat outputs

5 Shelf controls diagram showing which button controls which shelf; ex: press and hold shelf button 1 to set the bottom shelf heat value