A DIY filter rinse is worthwhile. But a filter only stops large dust. The biofilm — the actual source of smells, allergens and efficiency loss — sits on the coil and barrel fan behind the filter, which you can't reach without dismantling the unit.
Health
Professional cleaning removes the bacteria and mould that get aerosolised into the room. Households with allergies notice the difference within a week.
Cost
A properly cleaned system uses less power. Most professional cleans pay for themselves within a billing cycle.
Longevity
Clean coils and free-flowing drains dramatically reduce compressor stress and prevent water damage. Well-maintained systems last 50% longer.
Warranty
Most manufacturers require documented professional servicing for warranty claims on major components.
