Hi
I am not familiar with aircon. We had one Panasonic split unit installed 4 years ago but it was used only for the two month we were there. It was only switched on once a month since then so it does not get stuck. My BIL cleaned the outside unit heat exchanger and it now still runs perfectly and very quiet.
Should I have maintenance done after such a long time? Check at least the cooling fluid?
Thanks in advance.