First you need a "sniffer" then check every component and connection.

 

Sniffer?

 

Made in China parts is the true answer.

Look for oil stains around the bottom of the compressor and condensor, more than likely if they are not leaking then the evaporator is the leak

 

tests air for refrigerant.

 

you can also put dye in it and use a uv light and glasses to find it.

 

Yup. Never have I seen so much rubbish in all my life...and it just keeps coming. Nothing they make is trustworthy. I wonder how that feels...to know that everything you make is untrustworthy. I could not stand it.

 

Inject dye into the system, then run a UV light source over everywhere to find the leak.

 

Ahhh you Americian must buy junky china parts your children do not need to work so keep buying made in commie land parts.buy buy buy buy dont look to the future.