I have three devices that use the same outdoor sensor. I bought one of these as a spare and was happy I did as a couple of years ago I needed the last outdoor sensor as the previous one died. This month the final outdoor device stopped working properly. In both cases the outdoor sensor starts to read a higher temperature than reality. Interestingly, when brought indoors the sensor seems to read accurately but once outdoors they read too high.
They were on the side of my back steps until recently when I hung one on a light fixture after repair to the steps. The indoor temp was about 70°F. The outdoor temp reads about 10° or so high and the true outdoor temperature has been 30° to 50°.
I took one of the very rudimentary sensors apart. There were two capacitors that I measured as good. Is there anything that might bring these back into proper working order? The model is WS-9014U 433MNz
Here is a picture of the units:
