Preventive Air Conditioner Maintenance Checklist 2024


Summer is here, and ensuring your air conditioning unit works properly is crucial for maintaining a cool and comfortable home. When faced with air conditioning issues, it is essential to reach out to a trusted HVAC contractor immediately. To stay on top of necessary maintenance and scheduled services, having a comprehensive air conditioner maintenance checklist is invaluable.

Air Conditioner Maintenance Checklist

According to our thorough research general air conditioning maintenance must include the following checklist points:

Thermostat Settings

This guarantees that your thermostat is correctly installed and positioned away from any heat-emitting sources, such as sunlight, lamps, and appliances that generate heat.

Clean or Replace the Air Filters

Regularly inspect and replace air filters to improve air quality and system efficiency. Dirty filters should be replaced immediately, but at a minimum, change them every three months.

Examine All The Electrical Components And Controls

Check all electrical connections, measure motor voltage, and tighten connections to optimize energy efficiency and functionality.

Ensure Your AC Is Level

Ensuring your AC unit is both level and firmly positioned on the ground is crucial. While placing your unit on pads is acceptable, it’s important to ensure the pads remain stable. Using rocks or concrete can prevent any shifting. If your unit begins to tilt, it’s advisable to consult with your AC professional to maintain the stability of the unit.

Check The Area Around The Condenser

Clear away leaves, and debris, and trim bushes near your outdoor unit to improve airflow. While it may be tempting to hide the AC unit behind shrubs and trees for aesthetic purposes, this can hinder airflow and cause your system to work harder than necessary.

Clean the Condensate Drain Line

Regularly cleaning the drain pipe prevents blockages that can lead to leaks and potential damage to the piping system.

Check the Refrigerant Levels and Leaks

Ensure your system has sufficient refrigerant to prevent overworking. Low levels may indicate a refrigerant leak that requires professional attention.

Clean the Evaporator and Condenser Coils

The evaporator and condenser coils are prone to accumulating dirt and mold. Regular cleaning improves unit efficiency and prolongs its lifespan.

If your evaporator coils get too cold, the warm air around them can condense and form ice. Ice buildup will cause your compressor to run at a high temperature and burn your unit out. Check your coils at least once a month during the fall and winter. When you notice ice, turn off your unit and wait for the ice to melt. Clean your coils and check your unit for any debris buildup or blockages that may keep the air around your coils from escaping.

Related: How to Clean your HVAC Coils

Clean All Blower Components

Unclean blower components can hinder airflow and reduce system productivity. Regular cleaning prevents the circulation of debris and dirt throughout your home.

Lubricate All The Moving Parts

Properly lubricating parts reduce friction in motors and prevent increased electricity bills.

Seal Ducts Properly

Leaky ducts can reduce system efficiency. Consider sealing any leaks to prevent air from escaping into unwanted spaces in your home.

Inspect and Clean the Outdoor Unit

Perform a thorough inspection and cleaning of your AC’s outdoor unit as part of routine maintenance. Remove debris, dirt, and any obstructions to ensure optimal performance and longevity of the system.

Run the Final Test on Your AC System

After completing the preceding steps, proceed to test your AC unit. Switch on the power and allow it to run, remaining attentive for any uncommon noises.

Air Conditioner Preventive Maintenance Checklist By Professional

  • Blower Motor
    • Ensure proper operation by measuring amperage and voltage.
  • Thermostat
    • Test, calibrate, and level for optimal functionality.
  • Air Filter
    • Clean the existing air filter as necessary.
  • Bearing
    • Inspect for wear and apply lubrication.
  • Indoor Components
    • Thoroughly examine the indoor coil.
  • Condensate Drain
    • Perform a flush and apply anti-algae treatment.
  • Condenser Components
    • Inspect the Condenser Coil.
    • Remove debris and clean the condenser coil.
  • Refrigerant
    • Monitor operating pressures to ensure efficiency.
  • Safety Devices
    • Verify proper operation of safety devices.
  • Electrical Components
    • Inspect the Electrical Disconnect Box for proper rating and safe installation.
    • Check and tighten electrical connections.
    • Test/inspect contactors for burned or pitted contacts.
    • Inspect electrical components for exposed wiring.
    • Inspect and test capacitors.
    • Examine the fan blade.
  • Service Valves
    • Ensure proper operation of service valves.
  • Temperature Measurement
    • Measure the temperature differential between Supply and Return.
  • Duct Work
    • Inspect ductwork for any signs of energy loss.
  • Compressor
    • Monitor the compressor by measuring amperage and volt draw, and checking wiring connections.

By following these air conditioner service checklists and tips and scheduling regular professional maintenance, you can keep your air conditioner running efficiently, prolong its lifespan, and enjoy a comfortable and cool summer.

FAQs About the Air Conditioner Maintenance Checklist

Do Air Conditioners Need Annual Maintenance?

Absolutely! Regular maintenance is crucial to keep your air conditioner running smoothly. Neglecting annual maintenance can lead to reduced energy efficiency, increased energy costs, shortened lifespan of the unit, and potential breakdowns during peak summer months. Investing in annual maintenance not only saves you money in the long run but also ensures a comfortable and worry-free summer.

What Maintenance Should Be Done for AC?

Clean or replace your air conditioning system’s filter or filters every month or two during the cooling season.

What Is Checked During AC Maintenance?

Your technician will check the circuits, safety controls, drain line, condensate pump, and all caps and valves as well. Electrical components will be inspected for signs of wear or damage and replaced to prevent sparking or failure. He will check that your outdoor unit is level for optimum performance.

How Often Does Aircon Need Servicing?

Ideally, at least twice per calendar year: this ensures it is working at maximum efficiency. The majority of issues air conditioning units face are when the system has not had regular maintenance services.

What Is Preventive Maintenance on a AC Unit?

Check refrigerant levels and inspect for leaks. Clean and straighten condenser coils to ensure proper airflow. Check gas connections for leaks. Tighten all electrical connections. Lubricate all moving parts.

What are window air conditioner maintenance checklist?

  • Clean the exterior​
  • Clean the air filter​
  • Inspect other air conditioner components​
  • Check for proper drainage​
  • Inspect for mold​
  • Check the cord and electrical parts​
  • Test the AC unit before the summer​

What is the central air conditioner maintenance checklist?

  • Change the Filter
  • Check the Air Registers & Ducts
  • Clean Evaporator & Condenser Coils
  • Check & Clean the Drain Lines

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