It is recommended by the professionals to keep the vents clear and not place furniture or any other obstacle over them.
Every week you should vacuum the vents with a dust brush tool, otherwise you risk to fill the air with dust that you and your beloved will breath.
Do not forget to clear debris from around the outside condenser. This will help the air circulate.
You should also clean the inside of the consider unit once a season. This requires brushing the metal fins on the condenser, coil and then rinsing the coils with the garden hose and then clearing debris from the base pan on the bottom of the unit, recommend you house cleaning Sydney professional services.
If the you do not think that you can handle this, then it is preferable to AC professional services.
If you are thinking of replacing the unit then you should replace both the indoor and the outdoor unit that runs their air conditioning unit, do never forget that both components work together.
If you have a room unit air conditioner they should refrain from turning it on and off, the same way you should not repeatedly adjust the thermostat on a central air unit, as it was written above. If you do turn the unit off you should let it rest for at least five minutes. Turning it off and on stresses the compressor and you risk to damage it if switching it too often, be careful it is not a toy. That is why you should also keep it away from children. When kids are small they do not know what they are doing and that is why they play and bite everything they find especially when it has buttons on it. Be very careful, advise you domestic cleaning Sydney professionals. This is onw more reason why you need to keep your air conditioner at perfect condition, do not forget that kids need fresh and clean air.