That first surprise heatwave in the Bay Area always seems to arrive without warning. One day it's mild, and the next you're scrambling to get the AC running, only to find it's blowing warm air or making a strange noise. Waiting until you're desperate for cool air to discover a problem is a stressful and often expensive situation. A proactive approach is always better. By following a simple, year-round schedule for the maintenance air conditioner unit, you can ensure your system is always ready to perform when you need it most. This guide breaks down the essential tasks for every season, helping you stay ahead of problems and keep your home comfortable.
Spring: Getting Ready for Cooling Season
Spring is the most critical time for AC maintenance. After a winter of dormancy, your system needs a thorough check before the heat arrives.
Replace the air filter with a fresh one before running the AC for the first time.
Clear all debris—leaves, branches, dirt—from around and on top of the outdoor condenser unit.
Gently hose down the condenser fins from the inside out to remove winter buildup.
Check the condensate drain line and flush it with a cup of white vinegar to prevent algae growth.
Inspect refrigerant line insulation for any cracks or gaps and replace if needed.
Schedule a professional tune-up to check refrigerant levels and electrical components.
Summer: Ongoing Monitoring
During peak cooling season, your AC works the hardest. Monthly checks can prevent mid-summer breakdowns.
Check and replace the air filter monthly during heavy-use months.
Keep the area around the outdoor unit clear of vegetation and debris.
Listen for any unusual sounds like grinding, squealing, or rattling.
Monitor your energy bills for any unexpected spikes, which can signal efficiency loss.
Ensure your thermostat is reading temperatures accurately.
Fall: Post-Season Preparation
As temperatures cool, take the opportunity to prepare your system for the off-season.
Replace the air filter one more time before transitioning to heating mode.
Clean the outdoor unit once more to remove any summer buildup before it sits dormant.
Consider covering the top of the outdoor unit with a breathable cover to protect it from falling leaves and debris. Do not fully enclose it, as moisture can build up and cause damage.
Schedule a combined heating and cooling inspection if your system provides both.
DIY Limits: When to Call a Professional
The maintenance tasks above are well within reach of most homeowners. However, certain aspects of AC care should always be handled by a certified technician. Refrigerant handling requires an EPA certification and specialized equipment. Electrical component repairs—including capacitors, contactors, and wiring—carry serious safety risks. Any time you hear a significant mechanical noise, see ice on the unit, or notice a significant drop in cooling performance, stop using the system and call a professional immediately. The team at Ortiz Heating & Air is ready to help Bay Area homeowners with all their HVAC service needs.