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How to Clean a Wall-Mounted Heat Pump?

How to Clean a Wall-Mounted Heat Pump?

Welcome to AirGreen, Montreal's leading HVAC company. We specialize in the sale and installation of wall-mounted heat pumps, which offer both cooling and heating capabilities. Also known as mini-splits, these units are an essential part of many homes and businesses throughout our city, providing comfort and efficiency in all seasons.

One of the key elements to ensuring the longevity and optimal performance of your wall-mounted heat pump is regular cleaning. In this comprehensive article, we will guide you through the process of cleaning your heat pump, offering detailed and accessible steps that you can follow.

Understanding Wall-Mounted Heat Pumps

Before we delve into the cleaning process, it's essential to understand what a wall-mounted heat pump or mini-split is and how it operates. A wall-mounted heat pump consists of an outdoor unit containing a compressor, and an indoor unit responsible for distributing conditioned air into your space. They are connected by conduits that house power cables, refrigerant tubing, and a condensate drain.

Why Cleaning is Crucial

Regular cleaning of your wall-mounted heat pump ensures:

  1. Improved Air Quality: Over time, dust, allergens, and other particulates can accumulate in the filters of the indoor unit, negatively impacting the quality of air distributed around your home.
  2. Efficient Operation: Clean units operate more efficiently, as there's less obstruction to airflow. This can lead to lower energy bills and optimal temperature control.
  3. Extended Unit Life: Regular cleaning can prolong the lifespan of your heat pump by preventing the build-up of dust and debris that could cause wear and tear on components.

The Cleaning Process

Below are step-by-step instructions on how to clean your wall-mounted heat pump. Remember, if you're uncomfortable performing any of these steps, it's best to reach out to a professional HVAC service provider like AirGreen.

Disclaimer: Always turn off and unplug your heat pump before cleaning to avoid any electrical accidents.

Step 1: Clean the Filters

  1. Remove the front panel: Lift the front panel of the indoor unit to access the filters. The panel usually snaps on and off, but consult your user manual if you're unsure.
  2. Remove the filters: The filters should slide or snap out easily.
  3. Clean the filters: Use a vacuum cleaner to remove dust and debris from the filters. If they're very dirty, you can wash them with mild soap and warm water. Ensure the filters are completely dry before reinstalling them to prevent mold growth.

Step 2: Clean the Indoor Unit

  1. Clean the coils: Use a coil cleaning solution available at most hardware stores. Spray it onto the coils, then wipe off with a soft cloth. Be careful not to damage the fins on the coil.
  2. Clean the fan: Use a damp cloth to clean the fan blades. Be careful not to bend them.
  3. Wipe down the unit: Wipe down the rest of the indoor unit with a damp cloth, making sure to remove any dust or debris.

Step 3: Clean the Outdoor Unit

  1. Clean around the unit: Make sure there are no leaves, grass, or other debris blocking the outdoor unit.
  2. Clean the exterior: Wipe down the exterior of the unit with a damp cloth.
  3. Clean the condenser coils: Use a garden hose to rinse the coils from the outside in, being careful not to bend the fins. If the coils are very dirty, consider hiring a professional to deep clean them.

Remember, your wall-mounted heat pump should be serviced annually by a professional, but regular cleaning can help keep your unit running smoothly between service calls.

When to Seek Professional Help

If, during your cleaning process, you notice signs of mold, hear strange noises, or your unit isn't cooling or heating efficiently, it may be time to call in the professionals. At AirGreen, our experienced technicians are ready to assist with comprehensive heat pump cleaning and maintenance services.


Keeping your wall-mounted heat pump clean can significantly impact its efficiency, lifespan, and the quality of air in your home. Whether you're taking on the cleaning yourself or hiring a professional team like AirGreen, regular maintenance is key to getting the most out of your heat pump system.