Outdoor reset sensor

cheftim_2

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.

pecmsg

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

Most likely a bad connection somewhere.

hot_rod

Id ohm out the sensor first, values should be in the service manual. It is the most common failure

kcopp

I would blame the groundhog....

Big Ed_4

You need to replace the outdoor sensor and check the wiring ......

Big Ed_4

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 ...

pedmec

Ohm out the sensor. Compare the ohm reading to the chart in the manual