tools for an air conditioner service

Tips for Cleaning Your AC System

With summer coming to an end in St. Louis, now is a good time to get ahead on air conditioner maintenance.

If you haven’t cleaned it lately, it could be full of dirt and debris from your yard. This buildup can reduce your unit’s efficiency and cause it to break down. Or make it wear out more quickly.

We advise having your air conditioning system professionally maintained every year. Why? A clean unit can be more energy efficient, which could save you money on utility expenses.

Routine AC maintenance also helps our technicians locate and handle slight issues before they develop into costly problems.

Related: How to Keep Your Air Conditioner from Failing

Some of the work we complete consists of:

  • Inspecting the blower, motor, drain line and coils
  • Confirming pressure and temperature
  • Reviewing lines, refrigerant totals and connections

You can still have service done this fall—and we can get your furnace prepped for heating season too.

Schedule maintenance now


There’s also some upkeep you can do by yourself between professional tune-ups. You only need about an hour to clean your outdoor condenser unit, as well as a few parts on your indoor HVAC system.

Related: How Often Should You Expect to Get Air Conditioning Service Done?

How to Clean Your Outside AC Unit

Select a temperate day to clean your air conditioner. At least 60 degrees Fahrenheit (20 degrees Celsius) is great. That way, you can check your equipment once you’ve cleaned it.

You’ll only need a couple of things:

  • Wet-dry vacuum and hose with a soft brush attachment
  • Screwdriver
  • Butter knife
  • Damp rag
  • Small, round paintbrush
  • Replacement furnace filter (if necessary)

Related: How AC Repair and Maintenance Can Actually Save You Money

5 Steps to Clean the Outside Unit

1. Turn Off the Power

Cut the juice to your air conditioner at the breaker box.

2. Clean the Outside

Take out debris from the equipment. This includes branches, bushes, weeds and grass.

Then use the vacuum to gently clean the metallic fins. These components are also referred to as condenser coils and divert heat away from your equipment.

You need to be careful with these delicate coils. Misshapen or crinkled fins can affect efficiency.

3. Fix Bent Fins

Use a butter knife to straighten bent fins. You can also get a fin comb from an appliance parts retailer. A pro from Morgner Inc. Air Conditioning & Heating should fix large amounts of damage.

4. Clean the Inside

After extracting the fan, fish out leaves and other yard rubbish. Then mop the inside of the unit with a wet cloth.

The only coil cleaner you need is water. Use light pressure from a hose nozzle to rinse the fins, directing water from the inside out. Put the fan back in once you’re completed.

5. Test Your Air Conditioner

You can now restore power and turn your air conditioner back on. If it’s not working like it should, reach out to us a call at 314-262-4541.

Related: Air Conditioner Service: Pay a Little Now, Save Later

3 Steps to Clean the Indoor Unit

1. Turn Off the Power

Turn off the power to your furnace at the breaker box.

2. Check Your Filter

Furnace filters need to be exchanged every few months, depending on the model you use.

Unsure when you last put in a new one? Pull it out and hold it up to the light. If you can’t see light through it, get a new one.

3. Clean the Inside

Remove the blower door and vacuum up dust.

Then examine your air conditioner’s drain line—it’s a flexible plastic tube. If it’s scummy, you can freshen it by flowing thinned bleach through the tube to sanitize the line. Or you can replace the tube.

Scrub the drain port using a small, round paintbrush. Connect the drain tube and restore power.

Related: How to Keep Your Air Conditioner Running Well Through Fall

Never Forget a Tune-Up Again

Annual air conditioner maintenance from Morgner Inc. Air Conditioning & Heating can make your unit more efficient and help it last longer. We also have handy service agreements, so you won’t forget to book your annual service!

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