My heat pump's energy use has increased: what to check first

Separate the bill amount from energy consumed

To investigate an increase, find the kilowatt-hours for the period and check the dates. The amount can change because of the energy price, other charges or the length of the billing period. When comparing two bills, confirm that they cover equivalent periods before concluding that the heat pump is performing worse.

A household bill combines the home's different electrical uses. A new appliance, a vehicle being charged or more time spent at home can all have an effect. Without separate measurement, it is not correct to attribute the entire difference automatically to the heat pump.

Find out what the available record measures

Some controllers display energy data. Check the manual to establish whether it represents electricity consumed, heat produced or an estimate. These are different quantities. Keep a screenshot showing the period and the exact name of the reading so it can be interpreted correctly.

If you only have the main meter's information, use it as context and explain that limitation. Do not install meters inside the electrical consumer unit yourself. Where separate consumption figures are needed, a professional can assess an appropriate metering solution.

Compare similar usage conditions

Note whether there were more people, more showers or schedule changes during the period. Also check whether the heated or cooled area increased or a different temperature was requested. A week with the home occupied all day is not equivalent to one with long absences.

Outdoor weather also has an effect. A heat pump's heat exchange conditions change with the outdoor temperature and the required water temperature. Comparing very different months without context can therefore create an unnecessary alarm or conceal a genuine problem.

Review recent programme changes

Check whether the current schedule matches the intended one and whether a special function is active. If someone changed settings for a visit or holiday, find out what was changed. Do not erase data or reset the equipment to factory settings to start again.

If an emergency mode, backup mode or unfamiliar indication appears, note it and ask for advice. Do not disable electric heaters, protective cycles or hygiene functions in an attempt to reduce consumption. A technical change without diagnosis can affect the system's service and safety.

Relate consumption to comfort

Higher consumption with longer operating hours tells a different story from higher consumption accompanied by less heating or hot water. State whether the unit seems to start and stop differently, whether warnings appear or whether the change coincides with new noises.

In summer, a heatwave also changes operating conditions. That does not justify every increase; it provides context for assessing it. If the difference persists and does not fit the way the system is used, arrange an inspection rather than trying successive combinations of settings.

Gather enough information without monitoring it every day

Collect the periods being compared, available kilowatt-hour readings, occupancy changes and controller screenshots. Add the make, model and services used. A clear summary covering a few dates is easier to assess than a collection of unidentified figures.

You can ask Red Málaga about an inspection for high energy use. The information helps guide the checks, although it does not replace the measurements or diagnosis needed. The proposal should explain what will be checked; no savings figure can be guaranteed from a bill alone.

More common questions

Is it always better to switch the heat pump off to use less energy?

There is no universal rule. The schedule should suit the building, emitters and usage. Ask about appropriate scheduling for your system and avoid replacing it with power disconnections or improvised technical changes.