How To Clean the Indoor Coil on a Window Air Conditioner

By | March 5, 2022

How To Clean the Indoor Coil on a Window Air Conditioner 2020
Window air conditioners are good at keeping a room cool but do need maintenance to work properly.

One of the maintenance requirements needed is cleaning the coils inside and outside so that air can flow past the coil and properly remove heat.

If the inside coils become clogged, no air can blow past the coil’s fins, which will cause the unit to stop working properly.

A filter will be in place, which should be cleaned often to keep debris out of the coil.
How To Clean the Indoor Coil on a Window Air Conditioner
If the inside coil has become clogged with dirt and other debris, cleaning it is easy enough.

Be sure not to bend the coil fins, which will block airflow if bent.

Also, be sure not to use any chemicals that may blow bad air into a room.

If a cleaner is used, be sure it is certified for cleaning the coil, so as to not have a chemical smell in a home.

How To Clean the Indoor Coil on a Window Air Conditioner

  1. Open the front panel.
  2. The first thing that needs to be done is to get inside the front panel of your unit.

    Each unit is built differently as to how to gain access to the inside coil.
    How To Clean the Indoor Coil on a Window Air Conditioner 2017 Pi3
    Some will have a latch that opens up, while others will have the front faceplate held in place with screws.

  3. Spray the unit out with water.
  4. If the unit can be taken outside, then it is much easier to clean, although not necessary, and can be cleaned inside.
    How To Clean the Indoor Coil on a Window Air Conditioner 2017 Pi4
    Water needs to be sprayed into the fins to remove the debris.

    Using plain water in a spray bottle will work well to get water in-between the fins.

    A unit can also be taken out of a home and clean with a hose outside. If a hose is used, be sure not to use high water pressure, as too much pressure will bend the small fins that dissipate heat.

    Bending a few fins will not block much air, but bending too many fins will block the air, which the unit needs to work properly.

    The main goal is to get out any dirt or other debris that has built up, blocking the air from coming into a room.

  5. After cleaning the coil fins, test the unit.
  6. Once everything is cleaned and dry, the unit can be plugged back in and tested.

Category: window mounted air conditioner

About Aaron H. Benetti

Aaron H. Benetti has worked in the HVAC field since 1991. He began his career as an HVAC installer and later began doing troubleshooting and repairs. Around 2010, he began to write books on HVAC topics, mainly tutorials and how-to information. Currently, Aaron writes many articles and posts for websites as well as books and videos on HVAC topics.

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