Cleaning is not only a hassle, but there are some services that need to be handled professionally, such as aircon chemical washing. Best to find a reliable service instead of doing it yourself, which might ruin your while AC!This is some kind of internal error, or it is possible that the valves are dirty. I don’t know if you’re informed, but the air conditioner needs to be cleaned regularly and it’s really quite boring and tedious task and I personally prefer not to do it myself. I tried it a couple of times but in the end I almost ruined the air conditioner. So I'm sure it's best to go to the professionals. I know one great air conditioning repair and maintenance company and I am glad that I started working with the guys from socool.sg.