Seasonal Aircon Maintenance Checklist for Philippine Climate
A practical season-by-season maintenance checklist tailored to the Philippine climate: summer heat, typhoon season, and the cooler Amihan months.
Understanding Philippine Seasons for Aircon Maintenance
The Philippines has two main seasons: the dry season (Tag-araw, roughly November–May) and the wet season (Tag-ulan, June–October). Typhoon activity peaks from July to October. Each season creates distinct challenges for your aircon system, and proactive maintenance aligned to these seasons prevents breakdowns at the worst times.
Pre-Summer Preparation (February–March)
The hottest months in the Philippines run from March to May, with temperatures regularly hitting 35–40°C in Metro Manila. Your aircon will run 8–16 hours a day during this period. Prepare it in February before the heat peaks.
- Schedule a professional full cleaning — both indoor and outdoor units
- Check and top up refrigerant if cooling seems weak — do this before summer, not during it
- Clean or replace air filters
- Inspect the outdoor unit mounting bracket for rust or loosening — high winds during summer thunderstorms can dislodge improperly secured units
- Test run the unit for 30 minutes and check for unusual noises, smells, or leaks
- Verify that the dedicated circuit breaker is properly rated for the unit — summer overloads cause frequent trips
- Clean the drain line with bleach to prevent algae during the upcoming humid months
Peak Summer Maintenance (April–May)
During peak summer, your aircon works at maximum load. Maintenance during this period focuses on keeping the unit performing well under stress rather than deep servicing.
- Clean the air filter every 2 weeks — dust accumulation accelerates significantly during dry, windy summer months
- Set the thermostat to 24–26°C — running it at 16–18°C strains the compressor and wastes electricity
- Check for water leaks around the indoor unit weekly — condensation is highest in summer
- Ensure the outdoor unit is shaded if possible — direct sunlight raises condenser temperature and reduces efficiency by up to 15%
- Listen for new noises — compressors are most stressed in summer heat
- Keep curtains and blinds closed during peak sun hours (10am–4pm) to reduce the aircon's load
Pre-Typhoon Season Preparation (May–June)
Typhoon season in the Philippines officially runs from June to November. Strong winds, flooding, and power interruptions all affect your aircon system. A pre-typhoon checkup prevents costly post-typhoon repairs.
- Inspect and tighten all outdoor unit mounting bolts and brackets — replace any showing corrosion
- Install typhoon-grade brackets if you are in Signal No. 2+ frequency zones (Eastern Visayas, Bicol, Northern Luzon)
- Check that the outdoor unit drain holes are clear — water intrusion during heavy rain can damage the compressor
- Test the circuit breaker to confirm it trips cleanly — a sticking breaker is a fire hazard during voltage fluctuations from generator switching
- Install a quality AVR (Automatic Voltage Regulator) rated at 1.5–2x the aircon's power draw to protect against brownout-recovery voltage spikes
- Document your aircon model, serial number, and installation date — needed for insurance claims after typhoon damage
Wet Season Maintenance (June–October)
During the wet season, high humidity is the primary concern. Mold growth inside the unit accelerates, and the unit may be used less frequently — which paradoxically increases mold risk as moisture sits stagnant.
- Run the unit in "dry mode" or "fan mode" for 20–30 minutes before shutting off — this dries internal components and prevents mold
- Schedule a mid-year cleaning in July or August — mid-season cleaning catches mold before it becomes severe
- After a typhoon, inspect the outdoor unit for debris, dents, or water ingress before restarting
- Check the drain line monthly — typhoon debris can block outdoor drain outlets
- If the unit will not be used for 2+ weeks (vacation, province trip), run it in fan mode for 1 hour before leaving to dry it out
- Wipe down the indoor unit exterior with an anti-mold solution monthly
Post-Typhoon Checks
After a typhoon passes, do not immediately restart your aircon. Follow this checklist before turning it on to avoid electrical hazards and further damage.
- Inspect the outdoor unit visually — check for dents, debris inside the fan cage, or water pooling
- Check that all mounting brackets and wall anchors are still secure
- Inspect the power cord and outdoor wiring for damage from flying debris
- If the unit was submerged or water entered the electrical components, do not turn it on — call a technician first
- Dry the indoor unit exterior before operation if it was exposed to wind-driven rain
- Allow 30 minutes after power restoration before starting the aircon — voltage normalizes after brownout recovery
Amihan (Cool/Dry) Season (November–February)
The northeast monsoon brings cooler, drier conditions to most of Luzon and Visayas from November to February. This is the best season for major maintenance work and a perfect time to address deferred repairs.
- Schedule your annual deep cleaning and inspection — technicians have more availability and you have less urgency
- Consider replacing aging units (7+ years old) during this season — avoid making purchasing decisions in the heat of summer
- Have worn capacitors, belts, and filters replaced proactively rather than waiting for failure
- Clean and store any portable aircon units being put away for the season
- Review your electricity bills from the past year — large spikes indicate an inefficient unit that may be costing more to run than it would cost to replace
- Check warranty paperwork and service records — address any unresolved warranty claims before coverage expires
Schedule Professional Maintenance
Keep your aircon running at peak efficiency with certified cleaning and inspection services.