I am wondering when the installers here don't vacuum the air conditioner when it is fitted. I have installed 15 units of air conditioner (Panasonic, York, Daikin, Sharp, Carrier) and never once any of these installations were vacuumed. I believe this is the main reason why air conditioner doesn't last more that a few years before the compressor went faulty. The air and moisture in the piping will cause inefficient of the cooling which leads to higher power consumption and eventually the degradation and breakdown and corrosion of the system.

Of many of the installations, I have purchased the air conditioner from an authorized dealer after calling the brand principal that I want to have the installation vacuumed. Every time I was told "no problem, its OK, sure can..." but end up having some ignorant installer fitting the air conditioner.

The installers will usually say " can one....no problem one....no need to vacuum one....install so many units also no problem...huh? what is vacuum...." So they are trying to say that they are smarter than the engineers/chemists/designers of the manufacturers.

This is a reflection of the lack of knowledge and professionalism of the air conditioner industry in Malaysia.

Has anyone experience an installation that vacuum the pipe first before gas is released / charged?

so the installers are smarter than the engineers, no need to follow installation instruction....