Lesson page
More than 12 months since a professional clean
Use this page when the unit has simply gone too long without a proper service and needs a practical reminder rather than a scare campaign.
What this usually means
If it has been more than 12 months since a professional clean, there is a good chance the system has collected enough dust and moisture buildup to justify another service.
Do this first
Check the service history first. If nobody remembers the last proper clean, treat the system as overdue.
4-step check before you book
1
Confirm the date
Work out when the last full professional clean actually happened.
2
Do the quick visual check
Look past the filter area for dark dust, marks, or vent buildup.
3
Note usage level
Bedrooms, business sites, and all-day rooms usually need more attention.
4
Book before peak season
Do not wait until the hottest or busiest weeks if the unit is already overdue.