tools for an air conditioner service

Tips for Cleaning Your AC System

With summer ending in St. Louis, now is a good time to get a kick start on air conditioner maintenance.

If you haven’t cleaned it lately, it could be blocked with dirt and debris from your yard. This buildup can reduce your unit’s efficiency and cause it to break down. Or require replacement more quickly.

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

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
  • Watching pressure and temperature
  • Reviewing lines, refrigerant totals and connections

You can still have maintenance 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 just 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

Pick 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 electricity 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 cautiously clean the metallic fins. These pieces are also called as condenser coils and transfer heat away from your unit.

You need to be careful with these delicate coils. Warped or crumpled fins can affect efficiency.

3. Fix Bent Fins

Use a butter knife to straighten misshapen fins. You can also buy 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, pull out leaves and other yard waste. Then mop the inside of the unit with a wet cloth.

The only coil cleaner you should use 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 finished.

5. Test Your Air Conditioner

It’s safe to 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

Stop the power to your furnace at the breaker box.

2. Check Your Filter

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

Unsure when you last checked yours? Pull it out and hold it up to the light. If you can’t see light through it, buy 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 sanitize it by draining thinned bleach through the tube to sanitize the line. Or you can replace the tube.

Wash 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 equipment more efficient and help it last longer. We also provide handy service agreements, so you won’t forget to book your annual service!

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