Fresh air/recirculate steering wheel switch intermittent - how to fix?

The button to switch between fresh air intake and recirculating sometimes works, sometimes doesn't, and it seems to be temperature-based as to whether or not it'll function. Sometimes clicking it will cause the LCD display to change panel. Unsure where to start, or how to fix, as it's either in the button itself, or in something further inside.
Is this something I need to take to an autoelectrician?