top of page

Residential AC unit care and maintenance

Maintaining your residential air conditioning (AC) unit is essential to ensuring it runs efficiently, has a longer lifespan, and reduces energy costs. Here are some useful tips for proper care and maintenance of your AC unit:


1. Regularly Replace or Clean the Air Filter

  • Why: Dirty air filters restrict airflow, causing the system to work harder, which can lead to higher energy consumption and system wear.

  • How: Replace the filter every 1–3 months or clean it if it's a reusable type. If you have pets or allergies, consider changing it more often.

  • Tip: Use a high-efficiency filter (MERV rating of 8 or higher) for better filtration.


2. Keep the Area Around the Outdoor Unit Clear

  • Why: The outdoor condenser unit needs unrestricted airflow to function properly. Debris, like leaves, grass, and dirt, can block airflow and reduce efficiency.

  • How: Clear the area of any obstructions, such as leaves, branches, or dirt. Make sure the unit has at least 2 feet of clearance on all sides.

  • Tip: Trim any nearby plants or bushes to prevent them from growing too close to the unit.


3. Clean the Coils

  • Why: The evaporator and condenser coils can accumulate dirt over time, which decreases the system's ability to cool efficiently.

  • How: Gently clean the evaporator coil and condenser coil using a soft brush or vacuum. For deeper cleaning, consider using coil cleaner or having a professional service the unit.

  • Tip: If you're unsure, a professional technician can perform a thorough coil cleaning during a yearly maintenance check.


4. Check the Condensate Drain

  • Why: The condensate drain allows the moisture collected from the air to drain away. A clogged drain can cause water damage or mold growth inside the unit.

  • How: Ensure the condensate drain is clear by flushing it with a mixture of water and vinegar every few months. If you notice water pooling around the unit, it may indicate a clogged drain.

  • Tip: Use a wet/dry vacuum to clean the drain line if it's clogged.


5. Inspect the Insulation

  • Why: Insulation around the AC unit's refrigerant lines helps prevent energy loss and keeps the system running efficiently.

  • How: Check the insulation on the refrigerant lines to ensure it's intact. If damaged, replace or repair it to maintain efficiency.

  • Tip: Pay attention to any signs of wear, especially if the insulation is visibly cracked, wet, or missing.


6. Check Refrigerant Levels

  • Why: Low refrigerant levels can cause the system to lose cooling efficiency and lead to compressor damage.

  • How: If your AC is blowing warm air or isn’t cooling properly, it may have a refrigerant leak. Call a professional technician to check and refill the refrigerant if necessary.

  • Tip: Refrigerant maintenance should always be handled by a licensed HVAC technician, as it requires special tools and knowledge.


7. Test the Thermostat

  • Why: A malfunctioning thermostat can cause your AC unit to cycle incorrectly or fail to reach the desired temperature.

  • How: Test your thermostat settings by setting it to a few different temperatures. If the temperature doesn't adjust as set, the thermostat may need recalibration or replacement.

  • Tip: Consider upgrading to a smart thermostat to improve energy efficiency and provide more precise temperature control.


8. Schedule Annual Professional Maintenance

  • Why: Professional maintenance can identify potential issues early, ensure optimal performance, and extend the life of your unit.

  • How: Have an HVAC professional inspect and maintain your AC unit once a year, preferably before the cooling season starts.

  • Tip: Regular maintenance can catch issues such as refrigerant leaks, electrical problems, or worn-out components before they become major repairs.


9. Check and Adjust the AC Settings

  • Why: Running your AC at optimal settings ensures efficiency and comfort while minimizing wear and tear.

  • How: Set your thermostat to a consistent, comfortable temperature (typically between 72–78°F/22–25°C). Avoid frequently changing the temperature settings.

  • Tip: Use a programmable thermostat to adjust temperatures automatically when you're away or asleep, saving energy.


10. Seal Leaks and Improve Insulation

  • Why: Leaks around doors, windows, and ducts allow cold air to escape, making your AC work harder.

  • How: Inspect for drafts and seal any gaps with weatherstripping or caulking. Check ductwork for leaks and seal them to prevent cool air loss.

  • Tip: Ensure your home is well-insulated to reduce the strain on your AC unit and increase energy efficiency.


11. Turn Off the AC During Extended Absences

  • Why: Running the AC while you're away wastes energy and adds unnecessary wear on the system.

  • How: If you're going away for several days, set the thermostat to a higher temperature or turn it off entirely.

  • Tip: Use a smart thermostat that allows you to adjust the temperature remotely for convenience.



Get virtual help with DIY jobs with our xPorch App

app_call_screen.PNG

xPorch © 2025

Ask Us Anything!

Get help from a virtual expderts to fix your home renovation

xPorch offers homeowners the power to complete basic DIY repairs and renovations without spending hundreds of dollars on service calls. With xPorch, DIYers are a couple of clicks aways from connecting with experienced plumbers, electricians, and contractors. Our team offers on-demand virtual services around the year around all Canadian provinces.

 

  • Instagram
  • Facebook

Terms & Conditions    Privacy Policy  

bottom of page