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    legman69's Avatar
    legman69 Posts: 2, Reputation: 1
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    #1

    Jan 24, 2008, 08:52 PM
    All programed thermostat settings don't work
    I have a Goodman furnace which is controlled by a Honeywell thermostat. Noticed problems during the daily settings especially "Leave" or "Arrive" the temperature settings aren't maintained. Example: Set for 68 degrees and the temperature will be at least 3 degrees lower. Thermostat has been replaced, same issue. Only settings working correctly are "Awake" and "Sleep".

    Larry
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
     
    #2

    Jan 24, 2008, 10:10 PM
    What is the exact model of thermostat?
    legman69's Avatar
    legman69 Posts: 2, Reputation: 1
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    #3

    Jan 25, 2008, 08:58 AM
    The new one is RTH6300B - 5-2 day model

    The old one is TH4110D1007 - 5-2 day

    Similar results for both. This wasn't problem initially just lately. Been in this house 2 years.

    Thanks,

    Larry
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
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    #4

    Jan 25, 2008, 01:55 PM
    Here is the manual for your thermostat

    http://customer.honeywell.com/techli...0s/69-1717.pdf

    Here is the operator manual.

    http://customer.honeywell.com/techli...0s/69-1723.pdf

    Try to reset the energy star settings in the above manual. (page 16)

    The thermostat is allowed to have up to two degrees slide from setting.
    The thermostat that is built into the thermostat might not be posting the correct temp.
    Could be dead or weak batterys.
    Check over all the low voltage wiring from thermostat to furnace.

    You may have done all the above since you said the old thermostat did the same thing.
    Now taking that into consideration that both thermostats did this you might take into consideration a install problem.

    MAKE sure that the hole for the wires that come through the wall is SEALED TIGHT.

    This causes major problems because air inside the wall can be much colder than the air in the room. This will cause the thermostat to sense the in wall temperature and not the room temperature.

    Now I know this thermostat is not mounted on a exterior wall? If it is move it to a interior wall.

    Always make sure the batterys are installed correctly and are fresh.

    You have a bit if ammo here so see if any of this helps you.

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