Just want to share my experience with Hong Tar..

Got them to install the aircon 2 years plus ago (Mitsubishi Heavy Industries system 4 inverter).

The aircon was working fine until earlier this year I called them up for servicing (condenser dirty, charged 380+, with 180 for gas topup).

In March, the gas was gone and they came down to top up the gas. In April, the gas was gone again.

Called them up and they denied having anything to do with the gas leak and accepts no responsibility at all. They recommend to do a pressure test at $380.

After many calls (manager is always not around, to date I still have not gotten to speak to him/her), they finally agree to send down somebody to check. The result is still the same, a pressure test is needed.

I asked the support lady (Catherine) if she is in my position and her aircon is working fine until the servicing, would she think that it has totally nothing to do with the servicing, and she answered "yes".

When asked, they are not able to tell me the causes of gas leakage, so I searched on the web:

- locking nut at condenser not properly tighten

- over tightening caused the flare to crack

- flare was formed with ripples which results in leakage

- 2 pieces of copper pipes in the condenser are touching each other

- over charging of gas system causes compressor to overheat and damage shock absorbers

- over charging of gas system also causes compressor to vibrate vigorously

- pipe leakage

Seems from everywhere (except Hong Tar) I looked, the gas leakage points to the installation/serving done by them.

Please let me know if I am unfairly putting the blame on them.

Saw from daikin's website the gas top up is only S$35

http://www.daikin.com.sg/svc_charges.asp

but they charged me $180..