How often should you do an aircon chemical wash in Singapore?

A chemical wash does not follow one fixed calendar for every home. The right timing depends on use pattern, indoor dust load, and what the unit is doing now.

A fixed schedule can be a useful reminder, but it should not replace the condition of the unit.

This is why two homes with the same model can need different timing.

The right timing changes with indoor dust load, daily run pattern, and whether routine service still restores cooling and airflow well.

Homes with heavier daily use, more dust, or uneven cooling can need review sooner than homes with lighter use and stable performance.

The best clue is not the calendar alone. It is the pattern you see between service visits.

Use this as a planning guide, not a rule. If the symptom pattern does not match, check the cause before repeating the same scope.

The table helps you match frequency to context instead of copying a package schedule blindly.

The most common mistake is repeating chemical wash on a fixed schedule even when the unit is stable, or delaying needed recovery cleaning just because the date has not arrived.

If a unit is cooling well and has no buildup pattern, a deeper scope just because the date arrived can be poor value.

If a unit is struggling, waiting only because the next planned month is not here yet can also be poor value.

Plan your next service based on how the unit is being used and what pattern you see now.

If the pattern is unclear, ask for diagnosis-first advice before repeating a scope out of habit.

If a contractor recommends chemical wash, ask what finding shows routine service is no longer enough for your unit.