August 5, 2013

Air Conditioner Maintenance Tips for Summer Comfort

One of the most important parts of any HVAC system is the air conditioning unit. It works hard through the summer months in St. Louis, helping regulate both temperature and humidity, and it will often run for long stretches without much of a break. Regular maintenance is the key to keeping your air conditioner working properly, and failing to keep up with it can result in degrading performance and escalating operational costs. If you want to stay ahead of avoidable problems, a regular maintenance agreement is one of the simplest ways to keep tune-ups from being forgotten.

Summer HVAC Maintenance

Now is the time to schedule summer maintenance before the hottest stretches arrive. Most air conditioner problems can be spotted early during a maintenance check, and small issues are usually cheaper to fix before they turn into breakdowns. First, it is important to contact an HVAC expert if your air conditioner is not working properly. Tinkering with it yourself may make the situation worse. If you are not familiar with the mechanics of the device, you may not even be able to identify the reason for the issue, and you can accidentally turn a minor repair into a major one.

Replace the Air Filters

The second rule is to keep the machine clean, starting with the filters. All air conditioners come with filters, and you must routinely clean or replace these parts of the device. Dirty, dusty filters block the normal flow of air. The accumulated dust also affects the heat-absorbing capacity of the evaporator coil, and on the long run that can result in serious issues. Keeping filters in shape by replacing or cleaning them once every two months will significantly improve performance, and dirty filters can increase energy consumption by as much as 15 percent.

A few practical filter tips that help homeowners the most:

• Do not “stretch” filter life during high-use months. If airflow feels weaker than normal, check the filter early.
• Use the correct size so air cannot bypass the filter around the edges.
• Watch for dust return on furniture or vents, which can be a sign the filter is overloaded or not seated correctly.

Inspect the Evaporator Coils

Coil fins are common parts of air conditioners too. They are typically made of aluminum, and they tend to deform over time. A deformed coil fin will block airflow, degrading efficiency and increasing run time. Checking them on a regular basis, and fixing or replacing them if necessary, helps ensure the device performs at peak capacity.

This is also where “minor” maintenance matters. If the system is working harder to move air across the coil, you can see:

• longer cycles and higher energy use,
• hotter indoor temperatures during peak heat,
• more strain on components that are already aging.

Clear the Condensation Pipe

Check for clogs in the condensation draining pipe. Clogs may develop over time, and a clogged drain prevents the system from removing extra humidity in the air. Extra moisture in the home can cause discoloration of wallpaper and paint, and it can create the kind of damp conditions that feel uncomfortable even when the thermostat looks “right.”

A few signs the drain line may need attention:

• water near the indoor unit,
• musty odors near vents,
• humidity that feels higher than normal for the temperature.

Refresh Seals Around the Windows

Check the sealing around the windows and doors. At the end of the day, what is the point of supplying cool air inside the house if it is allowed to escape through cracks. Even small gaps can make your system run longer than it needs to, especially during hot and humid weather when the AC is fighting both heat and moisture.

A quick, simple approach:

• Spot-check drafts early in the morning or at night when the indoor-outdoor temperature difference is noticeable.
• Focus on the obvious such as worn weather stripping, loose door sweeps, or visible daylight around a frame.
• Keep blinds closed during the hottest part of the day to reduce heat gain and help the system cycle less.

Keep the Outdoor Unit Clear

Your system cannot run efficiently if the outdoor unit is smothered by debris or blocked airflow. Make sure the area around the outdoor unit is clear of leaves, grass clippings, and overgrown plants. If the unit is surrounded by clutter, the system can struggle to reject heat, which reduces efficiency and can increase wear.

A safe, homeowner-friendly habit is simply keeping clearance around the unit and gently clearing visible debris. If you are unsure what is safe to clean or touch, that is exactly what a professional maintenance visit is for.

Check Vents, Returns, and Airflow

Airflow problems do not always feel dramatic, but they quietly increase costs. Make sure supply vents and return grilles are not blocked by rugs, furniture, curtains, or stacked items. If rooms are suddenly cooling unevenly, or the system feels like it is running longer to reach the same temperature, that can be an early signal that airflow is restricted somewhere.

Good airflow helps everything else work better: filters stay cleaner longer, coils stay closer to designed performance, and humidity control is more consistent.

The End of Summer Season

After your air conditioner has worked hard through the summer, covering and wrapping the unused parts of the device can be a useful strategy in the right conditions. It can help protect the outdoor unit from winter weather while it is not in use and may prolong the lifetime of the machine. The key is doing it the right way for your specific setup, because trapping moisture can be counterproductive in some cases.

Quick AC Maintenance Checklist

Use this short checklist to keep your system running cleaner and more efficiently through peak summer use:

• Replace or clean air filters about every two months during heavy use.
• Keep vents and returns clear so airflow stays strong.
• Watch for unusual noises or longer run times that feel “new.”
• Check for signs of drain line clogs, including water or musty odors.
• Keep the outdoor unit area clear so it can release heat properly.
• Check door and window seals so cooled air is not leaking out.
• Schedule a professional tune-up before the hottest stretch hits.

Air Conditioner Maintenance FAQs