Venstar T1900 - Manual (Page 40)

Page 8.3
To prevent unauthorized use of the thermostat, the front panel
buttons may be disabled. To disable, or ‘lock’ the keypad, press
and hold the MODE button. While holding the MODE button,
press the UP and DOWN buttons together. The icon will
appear on the display, then release the buttons.
Press all three
buttons in the order
outlined above for
keypad lockout
MODE
H EAT
C OOL
65
I2:00
Pm
55
85
Locking/Unlocking the Keypad
8
To unlock the keypad,
holding the MODE button, press the UP and DOWN buttons
together. The icon will disappear from the display, then
release the buttons.
press and hold the MODE button. While
AUTO
Su