Due to erratic wind direction readings (jumping to north), and no response from Norwegian importer of Davis, I decided to try to fix this issue myself.

The Anemometer circuitry is covered in some rubber mass. I removed some of this around the edges. Then I used a ball joint tool that was perfect to force the potentiometer and circuitry out of the housing.

Removed the bolt in the tool, and inserted the axel of the potentiometer in the hole. Inserted the bolt, and used only my fingers to turn the bolt and add force. The unit loosened quite easy, and was still intact

Used a plastic tool to remove most of the rubber mass, and soldered out the original defective potentiometer.

Then I inserted a new one. This one did not fit in the holes, so I had to use some short wires to connect it. This was a Bourns 6639 20K potentiometer 360º turn no stop.

Used the opportunity to make a circuit diagram based on what I could see on the circuit board

Circuit board without potentiometer and windings for wind speed measurement.

Visible markings on the components:

· D1 A7W 43

· D2 KX 43A

· Q1 !301 R

· R1 105

· R2 909E

Resistance of the windings was approx 785 ohms.

NB! No guarantee that this is correct!