Tips for Cleaning Your AC System

September 20, 2019

With summer ending in Chelan and Wenatchee, now is a great time to get a head start on air conditioner maintenance.

If you haven’t cleaned it recently, it could be blocked with mud and debris from your yard. This accumulation can limit your unit’s efficiency and cause it to malfunction. Or make it wear out sooner.

We suggest 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.

Consistent AC maintenance also helps our technicians spot and address small issues before they become expensive problems.

Related: How to Keep Your Air Conditioner from Failing

Some of the work we do involves:

  • Viewing the blower, motor, drain line and coils
  • Checking pressure and temperature
  • Examining lines, refrigerant totals and connections

It’s not too late to have maintenance done this fall—and we can get your furnace prepared for heating season too.

Schedule maintenance now


There’s also some work you can do alone between professional tune-ups. It only takes about an hour to wash your outdoor condenser unit, as well as several 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 warm day to clean your air conditioner. At least 60 degrees Fahrenheit (20 degrees Celsius) is best. That way, you can test your equipment once you’ve cleaned it.

You’ll only need a handful of tools:

  • 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

Switch off the electricity to your air conditioner at the breaker box.

2. Clean the Outside

Empty rubbish from the unit. This includes branches, bushes, weeds and grass.

Then run the vacuum to slowly clean the metallic fins. These pieces are also referred to as condenser coils and divert heat away from your unit.

You need to be cautious with these fragile coils. Warped or crumpled fins can influence efficiency.

3. Fix Bent Fins

Use a butter knife to straighten misshapen fins. You can also get a fin comb from an appliance parts retailer. A pro from Lakeside Heating & Air should fix extensive damage.

4. Clean the Inside

After removing the fan, fish out leaves and other yard rubbish. Then clean the inside of the system with a wet rag.

The only coil cleaner you have to have is water. Use slight pressure from a hose nozzle to clean the fins, showering water from the inside out. Reinstall the fan once you’re completed.

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, give us a call at 509-284-4265.

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

3 Steps to Clean the Indoor Unit

1. Turn Off the Power

Cut the power to your furnace at the breaker box.

2. Check Your Filter

Furnace filters must be exchanged every couple of months, depending on the type you use.

Not sure when you last put in a new one? Pull it out and tilt it toward the light. If light isn’t visible, 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 dirty, you can sanitize it by flowing thinned bleach through the tube to sanitize the line. Or you can get a new tube.

Clean the drain port using a small, round paintbrush. Connect the drain tube and turn the power back on.

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

Never Forget a Tune-Up Again

Annual air conditioner maintenance from Lakeside Heating & Air can make your unit more efficient and help it last longer. We also provide handy service agreements, so you won’t forget to schedule your regular service!