A heat pump is low-maintenance, but not maintenance-free: Your contribution is limited to clear airways, the condensate drain and keeping an eye on consumption – everything on the refrigeration circuit and the electrics belongs to the professional. As a guideline value, heat pumps last about 15 to 20 years; the geothermal probe outlasts the device significantly. The biggest lifespan lever costs nothing: a system that is correctly dimensioned and does not cycle. (As of: July 2026)
Key points in brief
- Unlike oil and gas boilers, the heat pump has no burner service and no chimney sweep – the recurring mandatory appointment of old heating systems is eliminated.
- Your share is small and takes place outside: airways clear, condensate drain functional, consumption within the range of previous years.
- The refrigeration circuit is closed and taboo for laypeople; depending on the amount of refrigerant, periodic inspection obligations apply – the specialist company manages this.
- Guideline value for lifespan: about 15 to 20 years for the device; the geothermal probe lasts generations, the replacement later only affects the technology in the basement.
- What runs quietly lives longer: correct dimensioning and clean adjustment are more effective than any maintenance contract.
How much maintenance does a heat pump really need?
Anyone coming from oil heating knows the rhythm: annual burner service, chimney sweep, tank inspection. The heat pump breaks with this calendar – there is no burner, no combustion, no chimney. What remains is a closed refrigeration circuit without wear in the everyday sense and a few mechanical components (compressor, fan, circulation pumps) that simply run. What is actually involved in the switch itself is in the guide Replacing oil heating.
From this follows the same model that has proven itself with the solar system: you observe, the professional checks when required, what ages is replaced as planned. A rigid annual service appointment is technically mostly not necessary for a single-family home – with two honest exceptions: if the manufacturer's warranty conditions require periodic maintenance (it is worth reading up on this, especially with extended warranties), and if the system's refrigerant quantity dictates a periodic leak check – this tends to affect larger systems, and the specialist company will tell you during the handover whether yours is one of them.
What you do yourself – and what you do not
Your share is done in a quarter of an hour per season and largely overlaps with the Winter checklist:
- Keep airways clear – keep leaves, snow, vegetation and «decorative» coverings away from the outdoor unit.
- Check condensate drain – especially before and during winter; a frozen drain is the most common avoidable service case.
- Keep an eye on consumption – compare the annual bill with previous years, like with solar monitoring: What is noticeable is the unexplained trend, not the cold single winter.
- Listen closely – new noises (grinding, rattling, unusual humming) are worth a call.
Equally clear is the counter-list: The refrigeration circuit is taboo. It is hermetically closed, under pressure and contains refrigerant – only the professional with the appropriate authorisation works on it. The same applies to the electrics and to interventions in the control system's service menu. The boundary runs like with the solar roof: Observing is your job, intervening is theirs.
How long does a heat pump last?
About 15 to 20 years serve as a guideline value for the device – comparable with what oil and gas boilers achieved, and supported by the same factors: quality of the components, care of the installation and above all the type of operation. Individual components such as circulation pumps or the fan can be replaced along the way without the device being at its end; the compressor is the heart component, the failure of which towards the end of its life raises the question of replacement.
Two classifications make the number more manageable:
With the geothermal probe, only the device dies. The borehole outlasts several device generations – the replacement after two decades affects the technology in the basement, not the expensive source in the ground. This belongs in every long-term calculation.
Replacement is plannable, not a shock. As with the inverter of the solar system, the following applies: A device change after one and a half to two decades is the normal case, not a breakdown – and anyone who sees it coming (increasing malfunction frequency, drop in efficiency, spare parts situation) replaces it as planned instead of in an emergency. The error list for heating replacement applies just as much the second time as the first.
The biggest lifespan lever costs nothing
What causes heat pumps to age prematurely is rarely material fatigue – it is incorrect operation, above all cycling: An oversized system starts and stops incessantly, and every start burdens the compressor more than hours of quiet running. The longest-lasting heat pump is therefore not the one with the thickest maintenance contract, but the one that was correctly dimensioned and runs long, steady cycles.
In second place is the adjustment: A cleanly regulated heating curve not only lowers the electricity bill, but also the working temperatures and running load. Efficiency care is lifespan care – two sides of the same adjustment, which should take place in the first heating season.
Do you need a maintenance contract?
The answer is the same as with the solar counterpart: Usually no for a single-family home – observation plus occasion-related checks cover the need, and individual service call-outs can be commissioned if required. Three constellations change the calculation: Warranty conditions that require periodic maintenance (then the contract is effectively part of the warranty); inspection obligations due to the amount of refrigerant (rather larger systems); and properties where failure is expensive – apartment buildings with tenants who rightly expect warm water. Anyone who takes out a contract pays attention to the same thing as always: defined services, response times, price – not to the annual appointment as an end in itself.
People interested in heat pumps almost always ask us the maintenance question with the oil heating in the back of their minds – and the most honest answer is a comparison of calendars: With the old boiler, burner service and chimney sweep were in the house every year; with the heat pump, we only see many systems for years if we happen to drop by because of the solar roof. The service cases that do exist accumulate in two places: outside in the neglected surroundings of the outdoor unit – leaves, snow, the famous condensate drain – and inside on systems that have cycled from day one because they were bought too large. Both are avoidable, one with fifteen minutes of attention per season, the other with clean dimensioning before purchase. The rest is refreshingly boring with this technology – and boring is a compliment in the boiler room.
Frequently asked questions
How often must a heat pump be maintained?
There is usually no mandatory annual technical service for a single-family home like there is with an oil boiler – observation by you and occasional checks are customary. Exceptions: warranty conditions that require maintenance, and refrigerant inspection obligations for larger systems. You clarify both once at the handover.
Does refrigerant have to be topped up regularly?
No – the refrigeration circuit is closed; the refrigerant is not consumed. A loss means a leak and thus a service case, not a maintenance ritual. Work on the refrigeration circuit is exclusively a matter for authorised professionals.
How do I notice that my heat pump is ageing?
By the accumulation, not by the individual case: more frequent malfunctions, noticeably rising consumption in the same weather, increasingly difficult spare parts situation. Then it is worth tackling the replacement in a planned manner – with a comparison of quotes and an application for incentives before the start of construction, instead of later in an emergency.
Does a heat pump calcify like a boiler?
The heating circuit is a closed water circuit without a constant supply of fresh water – classic calcification as in domestic hot water does not take place there. For the hot water storage tank itself, the same rules apply as for any boiler, regardless of the heat generator.
Does a maintenance contract extend the lifespan?
Less than correct dimensioning does: The biggest driver of ageing is the cycling of oversized systems, and no service appointment helps against that. The contract makes sense where warranties require it or failures are expensive – as risk hedging, not as an elixir of life.
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So that your heat pump remains boring.
Correctly dimensioned, cleanly adjusted, explained at handover – and if something does come up, we are here. Even for systems that were not built by us.
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Swissolar-certified specialist company · ESTI installation authorisation (Art. 14 NIV) · in Zurich since 2017 · over 150 systems completed · a personal answer from the specialist company, no call centre
Sources: EnergieSchweiz (lifespan planning value for heat pumps ~20 years); Swiss studies on system lifespan (air-water ~20 yrs, geothermal probe systems longer); Fachvereinigung Wärmepumpen Schweiz FWS (operating and maintenance basics); empirical values from the service and project practice of ecoEn GmbH, Zurich region. (As of: July 2026)
Last updated: 9 July 2026 · Author: ecoEn editorial team
