Spring and Heat Pumps – Time for Service?

Spring is making its way into the Trondheim region, and it’s clearly noticeable – both on the thermometer and in everyday life. In areas such as Orkanger and Trondheim, recent weeks have brought major temperature swings, from double-digit sub-zero temperatures to surprisingly mild days. According to weather data from Orkanger, the temperature over the past month has varied from as low as -15.5 °C to 15 °C. That says something about how demanding this transition period can be – not only for us, but also for our homes and our heating systems.

At the same time, the forecast ahead points toward typical Trøndelag spring weather: a few sunny spells, but also periods of rain, wind, and temperatures shifting between a couple of degrees below zero at night and up to 10–11 degrees above zero during the day. This is a season when heating is still needed, but in a more unpredictable way than in mid-winter.

It is precisely in periods like these that the heat pump really gets to shine – or reveal weaknesses.

Spring weather and the heat pump’s role

When temperatures fluctuate around the freezing point, the heat pump operates under different conditions than on cold winter days. It has to adapt to frequent changes, switch on and off more often, and handle both humid air and milder weather. This places higher demands on efficient operation.

A heat pump that hasn’t been cleaned or maintained after a long winter will often use more electricity than necessary. Filters can be clogged with dust and particles, and the outdoor unit may have accumulated dirt, leftover ice, or grime. The result is reduced output exactly when you need flexibility.

Electricity prices: Less dramatic – but still important

If we look at electricity prices in Trondheim over the past month, an interesting picture emerges. Prices have ranged from around NOK 0.67/kWh at the lowest to NOK 1.57/kWh at the highest. In recent days, the level has stabilized at around NOK 0.90–0.95/kWh.

This means two things: First, the price level is not as extreme as in previous winter periods, but second, it is still high enough that inefficient heating is felt in your wallet.

A heat pump in good condition can reduce energy consumption by 30–60%, depending on the home and how it is used. But these savings depend on the unit actually performing optimally. If it is struggling, it uses more electricity – and then the benefit quickly disappears, especially during a period when electricity prices are still close to one krone per kWh.

Service: What many put off – but should prioritize

It’s easy to think service can wait. The heat pump is still running, after all. But spring is exactly the best time to address it.

A service visit typically includes:

• Cleaning of filters and the heat exchanger

• Checking refrigerant level and pressure

• Inspection of electrical components

• Review of the outdoor unit and condensate drainage

This is not just “nice to have”. It directly affects how efficiently your system operates.

Many people also find that their heat pump starts making more noise or delivers poorer heating over the course of winter. Often, these are simple issues that could have been resolved with a service. When this is done in spring, you are better prepared for both cooling in summer and the next heating season.

Better indoor climate – right in the middle of pollen season

An aspect of heat pumps that is often underestimated is their impact on indoor air quality. When spring arrives in Trøndelag, pollen, dust, and more humid air arrive with it.

A dirty heat pump can, in the worst case, contribute to poorer air quality, while a clean and maintained unit can actually function like a small air-cleaning system. This is particularly relevant for families with allergy sufferers.

Local conditions matter more than you might think

The climate in the Trondheim area – with coastal influence, wind, and rapid weather changes – means that heat pumps often experience more “wear and tear” than in more stable inland climates. For example, the data show that strong wind gusts of up to 19.4 m/s have occurred over the past month. Such conditions affect the outdoor unit in particular.

That is why it is especially important locally to follow up with regular maintenance, rather than simply relying on the system to “keep running”.

A small effort – a big impact

Spring is about getting things ready – whether it’s the patio, the car, or the house. Including the heat pump in this check is a simple step that can deliver noticeable results:

• Lower electricity bills

• More stable indoor temperature

• Better indoor air quality

• Longer system lifespan

In a region like Trondheim and Orkanger, where the weather changes quickly and electricity prices are still a factor, this may be one of the most sensible investments you can make right now.

When the sun starts to warm and the days grow longer, it’s easy to think the heating season is over. But the reality is that there are still many weeks left with a need for heating – and that’s when it pays to stay ahead.