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Outdoor reset sensor

cheftim_2
cheftim_2 Member Posts: 29
Good Afternoon,

I have a Buderus furnace with the 2107 controller installed and outdoor reset.
A couple weeks back it got a bit cold in the house and checked the reading of the outside air as seen by the outdoor reset sensor and read 84F when it was in the low 30's.

The controller saw that as Spring time and the warm weather shutdown went into effect.

I switched the controller from auto to winter to get heat back and now need to figure out why the bogus sensor reading.

Thinking the first place might be to verify connections on the controller and then ring out the wires to see if something broke. If that isn't the case, is the best next step to just replace the sensor and wiring or might there be some other troubleshooting steps first?

Thank you for any and all responses.

Comments

  • pecmsg
    pecmsg Member Posts: 4,844
    The controller saw that as Spring time and the warm weather shutdown went into effect.

    Does the controller have a day and time setting!
  • Jamie Hall
    Jamie Hall Member Posts: 23,276
    Most likely a bad connection somewhere.
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • hot_rod
    hot_rod Member Posts: 22,121
    Id ohm out the sensor first, values should be in the service manual. It is the most common failure
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
    GGross
  • kcopp
    kcopp Member Posts: 4,432
    I would blame the groundhog....
  • Big Ed_4
    Big Ed_4 Member Posts: 2,785
    You need to replace the outdoor sensor and check the wiring ......
    I have enough experience to know , that I dont know it all
  • Big Ed_4
    Big Ed_4 Member Posts: 2,785
    You can switch to manual .........

    Set the dial to 160* with your 30* outside .......

    The indirect water temperature will also reach 160* so be aware ...
    I have enough experience to know , that I dont know it all
  • pedmec
    pedmec Member Posts: 973
    Ohm out the sensor. Compare the ohm reading to the chart in the manual