FAQ

This question has been asked and wondered about time and time again. The common assumption seems to be that they don't. However, it is an electrical device that is often used heavily throughout the year, and regular maintenance every 1–3 years keeps the unit energy-efficient and safe to use. Dirt on the indoor unit's coil and fan rotor often only becomes apparent once problems have already started. It's a good idea to take a look inside the air outlet with a flashlight at least once a year to see if dirt has started to accumulate.

• The most important thing is to monitor the operation of the unit. If you notice unusual noises, malfunctions, or unpleasant odors, contact a service technician.

• Regular cleaning of the filters. The cleaning interval depends on usage and environmental factors, for example every 1–2 months. Vacuuming is usually sufficient, but they can also be washed if there is stubborn dirt.

• Basic cleaning of the outdoor unit, such as removing leaves and debris. Ice that has accumulated on the surface can be carefully melted with warm water. Turn off the unit before starting the melting process. For example, take a container of warm water and slowly pour small amounts over the surface of the outdoor unit so the ice melts.

• Do not hit or chip away ice with sharp or hard objects, as this may damage the outdoor unit.

A functioning older unit does not necessarily need to be replaced; it's often best to run it until the end of its service life. A malfunctioning unit that is over 10 years old should be evaluated on a case-by-case basis. A leaking coil, a failed compressor, or another expensive and labor-intensive repair is not always cost-effective, and that money may be better invested in a new unit instead.

A modern new unit uses newer and more efficient refrigerants and consumes less electricity relative to the amount of heat energy it produces.