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The option to silent audible tones may not be applicable on all models so you want to check your Owner’s Manual.
For applicable models - When selecting a function on your display, an audible tone is heard each time a key is pressed. If you desire, the display can be programmed for silent operation.
To set the controls for silent operation:
Press and hold Start Time for 6 seconds. The display will beep once and then you can release the key.
The controls are now set for silent operation.
To return your audible tones to normal operation:
Press and hold Start Time again for 6 seconds until the display beeps once and then you release the key. The controls are now set for audible operation.