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My visonpro Honeywell 8000 digital thermostat's screen is locked and I can't unlock it

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  • Anonymous Nov 08, 2008

    screen is locked and can't change the temp

  • Anonymous Jan 04, 2009

    When I press the system box and then press and hold the third box from the left on the bottom, nothing happens and no controls become available. I have held anywhere from four seconds to 30 seconds, and still nothing (no advanced features) are available. The screen locked status stays the same.

  • Anonymous Jan 09, 2009

    670 does not show up. It cycles through 120, 130, 140, 150, 160, 320, 330, 540 & 640....that's it.

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Push the System button, then in the bottom row of empty buttons, press the middle buttton for 4 seconds. The display will change, showing system codes on left and that code's setting on the right.
Choose 670, and option 0 opens it up completely, option 1 locks it partially. You should not try to override settings the HVAC/Building admin has set for you, in case you are trying to defeat their control.

Posted on Dec 24, 2008

  • VicS Feb 07, 2015



    On some versions of the Honeywell control, the way to get into the management menu to deactivate the lockout or other system options is not the middle button but the two buttons on either side of the blank middle button, held down for 4 seconds. The option setting for unlocking remains: setting number = 670 , value 0,1,2

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