Keep Your Cool: Must-Know Air Conditioner Maintenance Tips

by | Apr 26, 2024 | Maintenance

Have you ever purchased a brand-new item only to find it malfunctioning after a short while? Just like everything else, regular maintenance is crucial for ensuring that your appliances continue to function effectively. This is especially true for the HVAC system in your home. Here are essential tips to help maintain your air conditioner and keep your living space cool and comfortable.

Safety First

Before you begin any maintenance, ensure the power is completely turned off. This can be done by pulling out the disconnect and turning off the breaker. Additionally, turning off the thermostat is a good practice to ensure the unit remains off during your inspection.

Outdoor Condenser Unit Maintenance

Inspect the Condenser Unit

Check for any wildlife that might have taken up residence in your condenser unit. It’s not uncommon to find nests or even rodents. These animals can chew through electrical cables, leading to malfunctions. Even with the power off, beware of the capacitor as it can store voltage. When inspecting, be careful not to touch the prongs. Examine all connectors for signs of wear such as brittleness or exposure, and ensure the thermostat wire and suction line insulation are intact. Additionally, inspect the dual-run capacitor, which can weaken over time. Testing it with a multimeter can provide insights into its condition.

Clean the Condenser Unit

Being outside, the condenser unit is exposed to rain, dirt, and debris, which can clog it and hamper its efficiency. A clogged condenser coil impedes the heat transfer process, reducing cooling performance and increasing energy costs. To clean, gently spray the unit with a hose, avoiding high pressure that could damage the fins.

Indoor Air Conditioner Maintenance

Check the Temperature Differentials

For systems with both indoor and outdoor units (split systems), check the temperature differential between the supply and return ducts. Turn on the air conditioner and measure the temperatures at different points, looking for a 15-20 degree difference. A smaller differential might indicate issues like a dusty evaporator coil or a refrigerant leak.
Inspect the Evaporator Coil and Condensate Drain
Dust and debris on the evaporator coil can restrict airflow and cause the system to freeze up. Additionally, ensure the condensate drain line is clear. While some suggest using bleach to clean the drain, this can sometimes form a paste-like blockage. Instead, use air pressure to clear any clogs.

Change Your Air Filter Regularly

One of the simplest yet most effective maintenance tasks is to change the air filter monthly. This helps keep the evaporator coil clean and running efficiently.


Regular maintenance of your air conditioning unit not only ensures efficient operation but can also extend its lifespan. These tips will help you keep your system in top shape and your home comfortably cool.

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