Common Heat Pump Mistakes Kiwi Homeowners Make in Winter

When winter arrives, many Kiwi households rely heavily on their heat pumps to keep the cold at bay. They’re one of the most efficient ways to heat a home, but surprisingly, many homeowners unknowingly use them in ways that reduce performance and increase energy costs.

A heat pump should provide consistent warmth without sending power bills through the roof. However, simple habits can make the system work much harder than necessary. The result is often a home that feels colder than it should, higher electricity costs, and unnecessary strain on the unit itself.

At Fonko, we regularly help homeowners get the most out of their heating systems. Many winter callouts involve issues that could have been avoided with a few small adjustments. Here are some of the most common heat pump mistakes we see and how to avoid them.

Setting the Temperature Too High

When it's freezing outside, it's tempting to crank the heat pump up to 28°C or even 30°C in the hope that the house will warm up faster. It seems logical, but that's not actually how heat pumps work.

A heat pump doesn't heat your home more quickly simply because you've selected a higher temperature. Instead, it continues running until it reaches that target, often consuming more energy than necessary along the way. This can lead to increased power bills without providing any real benefit.

For most Kiwi homes, a setting between 20°C and 22°C delivers a comfortable indoor temperature while maintaining good energy efficiency. Think of it like filling a glass with water. Turning the tap on harder doesn't make the glass any bigger; it just creates more waste if you're not careful.

Blocking Airflow Around the Unit

Heat pumps rely on unrestricted airflow to distribute warm air effectively throughout your home. Unfortunately, furniture placement often gets in the way.

We frequently see indoor units partially blocked by sofas, bookshelves, curtains, or decorative items. While these obstacles may seem harmless, they can significantly reduce the system's ability to circulate warm air evenly around the room.

The outdoor unit also needs adequate airflow. If leaves, garden equipment, storage boxes, or overgrown plants surround the unit, performance can suffer. The system has to work harder to move air, which reduces efficiency and can contribute to wear over time.

Keeping both indoor and outdoor units clear allows your heat pump to operate as intended. A little breathing room can make a noticeable difference to both comfort and running costs.

Forgetting to Clean the Filters

Of all the heat pump maintenance tasks homeowners can do themselves, cleaning the filters is perhaps the simplest and most important.

Over time, filters collect dust, pet hair, pollen, and other airborne particles. As this build-up increases, airflow becomes restricted. The heat pump then has to work harder to push air through the system, reducing efficiency and increasing energy consumption.

Many homeowners are surprised to discover how dirty their filters become during winter, particularly when the system is running daily. In some cases, clogged filters can even affect heating performance, leaving rooms feeling colder despite the heat pump operating continuously.

Using the Wrong Operating Mode

Modern heat pumps offer several operating modes, and selecting the wrong one can lead to confusion and disappointment.

One of the most common mistakes is accidentally leaving the unit in cooling mode after summer. The weather turns cold, the heat pump is switched on, and instead of warming the room, it starts producing cool air. It's a surprisingly frequent problem.

Another issue occurs when homeowners constantly switch between modes in an attempt to improve performance. Heat mode is generally the best option during winter, as it is specifically designed to maintain a comfortable indoor temperature.

Taking a moment to confirm the correct setting can save frustration and ensure the system is working efficiently. If you're unsure, the heat symbol, often represented by a small sun icon, is usually the setting you're looking for during colder months.

Turning the Heat Pump Off Overnight

Many homeowners switch their heat pumps off completely before bed, assuming this will save money. While that might seem sensible, it can sometimes have the opposite effect.

When a home becomes extremely cold overnight, the heat pump must work much harder in the morning to bring the temperature back up. This sudden demand can increase energy use and make the house feel uncomfortable for longer.

In well-insulated homes, maintaining a steady temperature often delivers better results than repeatedly allowing the home to cool down completely. Some systems also include timer functions that can automatically adjust temperatures throughout the night and early morning.

Every home is different, but constantly switching the system on and off is rarely the most efficient approach. A consistent heating strategy usually provides greater comfort and more predictable energy usage.

Don't Ignore Professional Maintenance

While homeowners can handle basic filter cleaning and visual inspections, professional servicing remains an important part of long-term heat pump maintenance.

A technician can identify issues that may not be immediately obvious, including refrigerant problems, electrical faults, drainage concerns, or components that are beginning to wear. Addressing these issues early often prevents larger and more expensive repairs later.

Regular servicing also helps maintain peak performance. A heat pump that is operating efficiently uses less energy, heats more effectively, and typically enjoys a longer lifespan.

Get More From Your Heat Pump This Winter

A heat pump is one of the smartest investments a Kiwi homeowner can make for winter comfort, but getting the best results comes down to how it's used. Simple mistakes such as setting temperatures too high, blocking airflow, neglecting filters, using the wrong mode, or turning the system off completely overnight can all affect performance and increase running costs.

At Fonko, we help homeowners across New Zealand keep their heat pumps operating efficiently through expert installation, servicing, and maintenance. If your system isn't performing as well as it should, or you're due for a professional check-up, get in touch with our team today.

FAQs

What temperature should I set my heat pump to in winter?

For most homes, 20°C to 22°C provides a comfortable balance between warmth and energy efficiency.

How often should heat pump filters be cleaned?

During winter, filters should ideally be checked every two to four weeks, depending on usage and household conditions.

Does turning a heat pump up higher heat the room faster?

No. Setting a higher temperature doesn't make the unit heat more quickly. It simply instructs the system to continue heating until that higher temperature is reached.

How often should a heat pump be professionally serviced?

Most residential heat pumps benefit from professional servicing every 12 months to maintain performance and identify potential issues early.