At last

At last I decided to service my shop air conditioner. Since the day it was fixed to the wall until now, it has yet to be serviced. I do clean the filter from time to time but that does not really help. After much thinking, I finally decided to call the service guys and they came. Wow, it was dirty, covered with much dust. Really glad that I made the right choice. Will ask them to service another unit of air conditioner by next month.