I had my reverse cycle aircon serviced today by same company from whom I bought it 3 years back. They quoted 165$ for service which I agreed on. All the service man did was to hose down with water return air grill and outside unit, fixed return air grill where one screw had become loose. He did not even go in roof space to check whether all air vents are proper or not. After I mentioned that to him, he went in roof space and came back in 3-4 minutes. I have 9 zones in my house and 16 KW system. There is no way he could have checked all vents in 3-4 minutes. In outside panel, he did remove electric cover and just tightened some screws. All this, I could have done myself, no special knowledge or skill required. I thought he will check refrigerant pressure and conduct some tests regarding whether air is leaking in vents etc. Was I right in assuming this ? What does aircon service involves ? I am angry for this rip off and want to write strongly to company but before that I want to have my facts right.