Near the water. From the Northern Beaches to Cronulla, salt spray lands on the outdoor coil and slowly eats the aluminium fins and the copper joints behind them. Pinhole leaks follow, and a Fujitsu that is short of refrigerant cools less every week. Topping it up without finding the hole is money wasted, so our aircon regas in Sydney locates and repairs the leak before any recharge.
Apartments. A condenser wedged into a balcony corner, behind louvres or among a dozen others on a plant deck often breathes its own exhaust. It runs hot and stops to protect itself, and sometimes the cure is airflow, not parts. If yours is on a roof, ask the building manager to have access ready.
Out west. On a 40-plus degree day in Campbelltown or Rouse Hill a Fujitsu can run flat out for most of the afternoon. Capacitors, fan motors and outdoor control boards take the brunt, so a heatwave tends to expose a weakness that was already building.