Assuming the filter is clean then you may have to open it up and clean both the condenser coil and the expansion coil, they are probably dirty. It is a job you'll want to do outside with a garden hose. The pressure you use is a matter of experience so you don't use to much force from the hose and bend the fins on the coils. The coils need this cleaning done from time to time as it is just part of normal care. No recharging is needed as the system is sealed and should never leak, contains no high pressure refrigerant hoses that can leak with age as does automotive air conditioning, yes our cars are made different because a lot of flexing and moving of said parts occur with an automobile.
Answers & Comments
Assuming the filter is clean then you may have to open it up and clean both the condenser coil and the expansion coil, they are probably dirty. It is a job you'll want to do outside with a garden hose. The pressure you use is a matter of experience so you don't use to much force from the hose and bend the fins on the coils. The coils need this cleaning done from time to time as it is just part of normal care.
No recharging is needed as the system is sealed and should never leak, contains no high pressure refrigerant hoses that can leak with age as does automotive air conditioning, yes our cars are made different because a lot of flexing and moving of said parts occur with an automobile.