Safety Note: A comprehensive annual service includes refrigerant pressure checks, coil cleaning, and electrical connection inspection. These tasks must be performed by a licensed technician.
Step-by-Step Guide
- 1
Every 2–3 weeks: Filter check
Remove and inspect the filters for dust build-up. Dirty filters restrict airflow, increase energy consumption, and can lead to odour problems. Clean if necessary.
- 2
At the start of each season: User check
Before the start of summer or winter, run the unit for a few minutes. If you notice unusual noise, vibration, odour, or an error code, call a technician before the season begins.
- 3
At least once a year: Professional service
An annual service by a licensed technician should include coil cleaning, drain line inspection, refrigerant pressure measurement, and electrical connection checks.
- 4
Before extended storage: Shutdown preparation
If the unit will not be used for a long period, run it in FAN-only mode for a few hours to dry out the indoor unit, then switch off the power.
Frequently Asked Questions
When is the best time to service an AC?
April–May is ideal before the cooling season; September–October before the heating season. Servicing before the season begins helps identify potential faults before they cause problems during peak use.
What happens if I skip AC maintenance?
Without regular maintenance, energy consumption increases, cooling and heating efficiency drops, odour problems may develop, and the risk of breakdowns rises. Maintenance costs are typically much lower than repair costs.
Does filter cleaning replace a professional service?
No. Filter cleaning is a basic task the user can perform, but it does not substitute for coil cleaning, refrigerant pressure measurement, or electrical connection checks that a professional service includes.
Is a maintenance contract worth it?
If you have multiple AC units or use them intensively, an annual maintenance contract can be cost-effective and convenient. Review the contract scope carefully with the service provider.