Thanks DC. I know Martin quite well, and will call him.Contact Martin, Gibb Apartments. In the 3 years I rented there he used to get a good serviceman to do the Aircond. Look at Gibb Apartments FaceBook page for his number. He is a very obliging chap.
We used to get our local sparks to service ours but, not only is he very busy, he's now located in Khon Kaen so he'll need to travel.
However, Khoaw from Bamboozled knows a decent aircon service guy (apparently). Try ringing her or Danny.
I remember that she said a couple had set up in business to do this a couple of years ago. Thanks Yorky.