Safety Note: Refrigerant pressure checks, coil cleaning, and electrical connection inspection require a licensed technician. Do not attempt these tasks yourself.
Step-by-Step Guide
- 1
Remove and clean the filters
Remove the filters and clean away the dust that has built up over winter. Wash with a dry brush or lukewarm water, dry completely, and reinstall.
- 2
Wipe the indoor unit and housing
Use a damp cloth to clean accessible plastic surfaces and the air inlet and outlet grilles.
- 3
Test cooling mode
Run the unit in COOL mode for 10–15 minutes and confirm that cold air is actually coming out. If cooling is weak or absent, call a technician before the season begins.
- 4
Check for error codes
Watch the display for any error codes or flashing indicators while the unit is running. If a code appears, note it and look it up in our error code guide.
- 5
Listen for unusual noise or vibration
Note any clicking, whistling, or excessive vibration during operation. These can be signs of a technical issue — report them to a licensed technician.
- 6
Clear the area around the outdoor unit
Remove dry leaves, branches, or accumulated debris from around the outdoor unit. Airflow to the unit must remain unobstructed. Do not touch the panels or fins on the outdoor unit.
Frequently Asked Questions
When should pre-summer AC maintenance be done?
April–May is the ideal window, before temperatures rise. Service appointments are easier to book at this time, and any faults can be caught before peak demand.
What does a professional pre-summer service include?
A professional service typically includes coil cleaning, refrigerant pressure measurement, drain line inspection, and an electrical connection check. These tasks require a licensed technician.
Is pre-summer maintenance necessary if the AC was unused all winter?
Yes. An AC that has been idle for months may have dirty internal components, a blocked drain, or even a refrigerant leak. A pre-season check helps catch these issues early.