A ducted aircon error code means a protection has tripped. Note the code, switch off, check the filter. Brand guides for Daikin, Mitsubishi, LG, ActronAir.
Mitsubishi P5 error code is a drain pump error: the float switch keeps finding water in the drain pan. Causes, what to do, plus P6, PA and other PEAD codes.
Daikin A3 fault code = drain alarm: water in the drain pan is too high from a clogged drain, failed pump or float switch. What to do, plus A5, E3, U0, U4.
LG CH04 means condensation isn’t draining from a ducted or cassette unit: drain pump, blocked hose or dirty filter. What to check, one reset, when to call.
Ducted air conditioning cleaning involves a new filter, duct foils cleaned to the return duct, a sanitise and an airflow test: $349 + GST, free inspection.
A musty aircon smell means mould and bacteria on the coil, fan barrel, drain tray or filter. What you can do yourself, and what a deep clean fixes in Sydney.