Only if got leak ba.
few hours is definitely an issue. ask the aircon man to check pressure, topping up should be rare, might be other issues.but my air con like after ask them to come to clean, still need to on for a few hours than will cold.
so I think could be not enough gas need to top up...
my brother sis and my house, never top up gas before. more than 5 years.So far only once after 3 years
Possible too.my brother sis and my house, never top up gas before. more than 5 years.
3yrs already.As above.
When they come to clean your air con, do you ask them to check your compressor to see if need to top up gas?
How often you top up gas for your air con?