Based on this thread i decided to try this Mr. Ng to fix my casement aircon and what a nightmare! Initially he assessed and concluded that it's a simply a case of coolant top up but told me he had to bring back to his workshop. He quoted me $150 initially i was a bit shocked cos the prices mentioned here hovered around $50+ for actual/split unit but he assured me he would "do a good job" and we settled on $130. A few days passed he came over and reinstalled the unit and just to confirm i ran it one night and after 6 hrs the unit broke down! When he came down he noticed my spoilt multi split unit and told me if i want he can get me a refurbished single split for $9xx and that this was "market price" I was now suspicious because my initial research before getting the casement was single splits and brand new unit can come cheaper than this! So the 2nd time he came he only top up coolant again and sure enuff this time after 3 hrs the unit broke down! My last conversation he told me it was suspected compressor leak and i told him the 1st time he took back to workshop i was under impression that proper assessment of the fault was done and that end of the day i have parted with $130 and had not one but two breakdowns and the problem was not resolved! He said he could fish for a used unit and mentioned something like "transplanting" compressor or the like and to give him "a few days" That was 3 weeks ago
In conclusion for me
#1 No/not enough due diligence shown - took back unit problem not correctly identified
#2 Not as cheap/professional service as suggested by some in this thread IMO
#3 Little/no follow up