Get Your Heat Pump Summer-Ready: How to Prevent Poor Performance, Bad Smells and Icing Up

As summer approaches, your heat pump or air conditioner is about to work much harder. If it has been sitting through the cooler months, dust, mould, pet hair and everyday grime can build up inside the filters, vents and indoor unit.

That buildup can lead to poor performance, unpleasant smells and, in some cases, the indoor coil icing up. The good news is that a simple DIY clean before summer can help your system run more efficiently and keep the air in your home feeling fresh. Our DIY home heat pump and air conditioner cleaner is made for this kind of seasonal maintenance.

Why clean your heat pump or air conditioner before summer?

Regular cleaning helps remove the dirt that restricts airflow and makes your unit work harder than it needs to. A clean system can help:

• Improve airflow and cooling performance
• Reduce musty or unpleasant smells
• Help prevent dust and grime from building up
• Reduce the chance of restricted airflow contributing to icing
• Keep your home more comfortable as temperatures rise

Cleaning is not a substitute for professional servicing, but it is an easy part of looking after your system between services.

Signs your heat pump needs a clean

Look out for weak airflow, a musty smell when the unit starts, dust around the vents, water dripping from the indoor unit, unusual noises, or ice forming on the indoor coil or outdoor pipes. These symptoms can have several causes, but dirt and restricted airflow are common ones worth checking first.

How to use a DIY heat pump and air conditioner cleaner

1. Turn the unit off

Switch the heat pump or air conditioner off using the remote, then isolate the power at the wall switch or breaker. Wait for the unit to stop completely before cleaning.

2. Clean the filters

Open the front cover and remove the filters according to your manufacturer’s instructions. Remove loose dust, then wash the filters if they are washable. Let them dry completely before putting them back.

3. Protect the area

Use a heat pump cleaning cover or a suitable towel and bucket to protect the wall and floor from runoff. Keep water and cleaner away from electrical controls, wiring and the remote control receiver.

4. Apply the cleaner

Apply a purpose-made DIY home heat pump and air conditioner cleaner to the accessible fins, coil and fan barrel, following the product label carefully. For larger cleaning jobs, our DIY Supercell Coil, Duct & Filter Disinfectant Cleaner 5L is another option. Allow the cleaner to work for the recommended time. Do not use harsh household chemicals or force liquid into areas that are not designed to be wet.

5. Rinse and dry as directed

Remove loosened grime as directed by the cleaner’s instructions. Refit the dry filters, close the cover and restore power only when the unit and surrounding area are safe and dry.

6. Run the unit

Run the system on fan mode or cooling mode as recommended by the cleaner’s instructions. Check that airflow improves and that there are no leaks, unusual noises or persistent smells.

How to help prevent icing up

Icing can happen when airflow is restricted, the filters are blocked, the coil is dirty, or the system has another fault. Cleaning the filters and accessible indoor components can help maintain airflow, but never chip ice off with a sharp object or keep running a unit that is heavily iced.

If icing returns after cleaning, the airflow remains weak, or the system is not cooling properly, switch it off and arrange a qualified technician to inspect it. Refrigerant work and electrical repairs should always be left to a professional.

Make cleaning part of your summer routine

A quick clean before the first hot spell, followed by regular filter checks, can make a noticeable difference to comfort and airflow. Keep your heat pump cleaner ready so you can deal with dust and odour before they turn into a bigger problem.

Ready to get started? Shop the DIY home heat pump and air conditioner cleaner, or choose the 5L coil, duct and filter disinfectant cleaner for larger cleaning jobs.