Buderus Outdoor Sensor

Big Ed_4

What is replacement resistor for Buderus outdoor sensor ?

D107

HO here. Here's a reply Joe at Buderus once gave to a question like this:
"The outdoor sensor is a thermistor which works on a ten K Ohms of resistence scale to determine the outdoor temperature. It is suggested to disconnect the wires from the outside sensor and measure the resistence of the sensor (compare the resistence reading with the chart in the R2107 Service Manual). Reconnect the wires, then disconnect the wires from the R2107 Control and measure the resistence again as the wire may be the cause. If the Ohms of resistence is the same, pull out the plug from the control, connect the wires to the plug, measure the resistence through the plug. If all Ohms readings are the same, replace the outside sensor. Many times the wire between the sensor and the control are the issue. Make sure the wire from the outside sensor does not run parallel with any other wires, "kinked" or a staple through it."

NY_Rob

Hi Ed,

You can use either a bead type 10K Ohm NTC (Negative Temperature Coefficient) or a barrel type thermistor of the same value.
If you're replacing a thermistor that's soldered to a circuit board, replace it with a bead type. If it's a freestanding thermistor inside an enclosure or otherwise exposed to the weather use the waterproof barrel type.

Big Ed_4

Thanks for the info , very useful ... Thanks again