Heat pumps also age. After many years of operation, efficiency, the compressor, control system or storage may become an issue. Then the question arises: repair, renovate individual components or replace the entire system? The good news: heat pumps are long-lasting, and a planned replacement can generally be approached more calmly and with more comparison options than an emergency solution in the middle of winter.
The most important points in brief
- Heat pumps often last around 20 years or more.
- Individual repairs can be sensible if the basic condition is good.
- Frequent faults and high energy consumption suggest assessing whether replacement is needed.
- A replacement may be sensible if new units better suit the current building and operating situation.
- Storage, hydraulics and control should also be reviewed.
- A planned replacement is better than an emergency solution in case of failure.
- As of 12.07.2026
- Sources at the end of the article
How long does a heat pump last?
A well-maintained heat pump often reaches around 20 years or more. Individual components have different lifespans: the compressor is the core component, while the control system, circulation pumps or the storage tank can often be renewed separately. Regular inspection and professional operation can help maintain reliability and efficiency.
Repair or replace?
| Situation | Trend |
|---|---|
| clearly limited damage, spare parts available, good basic condition | rather repair |
| advanced age, frequent faults, high energy consumption | rather replace |
| expensive core component (e.g. compressor) at end of life | check replacement |
| Spare parts no longer available | Replacement |
Rule of thumb: As long as the overall condition is sound and there is limited damage, a repair is often worthwhile. If faults become frequent or consumption rises noticeably, a replacement should be professionally assessed.
What is checked?
Before making a decision, a specialist should assess the entire system – not just the unit:
- heating output and actual heat demand
- Flow temperature and condition of the heat distribution
- Storage (domestic hot water and buffer)
- Hydraulics (pumps, valves, pipes)
- Electrical connection and control
- Location and sound insulation
- Possible integration of a photovoltaic system
A replacement is a good opportunity to design the system anew and correctly (see Sizing a heat pump) and to improve efficiency.
Compare quotes for free Your heat pump is getting older and you want to know whether repair or replacement is worthwhile? Through waermepumpen-guide.ch, you can submit your request free of charge and without obligation. Your request will be forwarded to up to three suitable specialist installers from your region, who will assess the system. Compare quotes for free
Cost factors in replacement
As of July 2026. The costs depend on what is being replaced. These blocks belong in the quote; the values do not replace an individual calculation:
| Cost factor | Note |
|---|---|
| new heat pump | Type and output |
| Dismantling | Removal of the old system |
| Storage | if necessary, replacement of the domestic hot water/buffer tank |
| Hydraulics | Pumps, valves, pipes |
| Electrical work | Connection and control |
Since the heat distribution and sometimes the storage remain in place during a pure equipment replacement, the exchange can be cheaper than an initial installation. A comprehensive overview is provided by What does a heat pump cost in Switzerland?; for efficiency, see Electricity consumption of a heat pump.
Have the replacement calculated transparently The specialist partners can itemise the equipment, storage and hydraulics individually. Through waermepumpen-guide.ch you can reach up to three suitable specialist installers from your region – free of charge and without obligation. Compare quotes for free
Subsidy for replacement
Whether the replacement of an existing heat pump is subsidised varies by canton. Many programmes focus on switching from fossil to renewable heating; the replacement of an old heat pump with a new one is not treated uniformly everywhere. It is worth looking at the cantonal programmes – details under Heat Pump Subsidies Switzerland 2026. The application must generally be submitted before construction begins; the subsidy is not guaranteed.
Planned replacement instead of a stopgap solution
If a heat pump fails in winter, time pressure arises – and time pressure often leads to compromises regarding the device, sizing and price. Those who have the system assessed in good time and plan the replacement can compare at leisure, apply for subsidies and optimise efficiency. If faults and consumption increase, this is the right time for a professional inspection.
Typical errors
- Waiting too long. A breakdown in winter forces an emergency solution.
- Considering only the unit. Storage, hydraulics and controls are part of the system too.
- Reusing the old design. Replacement is a chance to size the system correctly.
- Not checking subsidies. Cantonal contributions may also be available for replacement.
- Overlooking PV integration. Replacement offers an opportunity to integrate solar electricity effectively.
Checklist before replacement
- Document age, frequency of faults and consumption
- have the entire system inspected (unit, storage, hydraulics, electrical)
- Review the sizing instead of blindly accepting it
- Check subsidy options at the location
- Check PV integration
- Plan replacement in good time, not only upon failure
The renewal is also an opportunity to rethink the overall system. Those who originally switched from oil will find important dismantling points in the process Replacing oil heating with a heat pump; a heat pump with photovoltaics can improve self-consumption. The overview of Planning errors with heat pumps helps to avoid carrying over old design errors.
When is it worth comparing multiple quotes?
Whether repair or replacement, whether just the unit or also storage and hydraulics – here the assessments of specialist installers differ. A comparison of several quotes provides clarity. Two to three complete quotes are usually sensible for this purpose. What you should pay attention to is shown in the checklist for comparing quotes.
Conclusion
An old heat pump does not necessarily need to be replaced immediately. As long as the overall condition is sound, a repair may make sense. If faults and consumption increase, a professional inspection of the entire system is worthwhile – along with a planned replacement that takes efficiency, subsidies, and PV integration into account. Multiple quotes help find the best solution.
Compare heat pump quotes Through waermepumpen-guide.ch, you can submit your request free of charge and without obligation. Your request will be forwarded to up to three suitable specialist installers from your region, who will prepare individual quotes. Compare quotes for free
Frequently asked questions and answers
How long does a heat pump last?
Often around 20 years or more, with good maintenance. Individual components have different lifespans.
When is a repair worthwhile?
In case of clearly limited damage, available spare parts, and good overall condition.
When should you replace it?
When the system is old, has frequent faults or high energy consumption, or an expensive core component is at the end of its life.
Is there a subsidy for replacement?
This varies by canton. Many programmes focus on switching from fossil to renewable energy; the application usually has to be submitted before construction begins.
Why is a planned replacement better?
Because it allows time for comparison, subsidy applications and correct design – unlike an emergency solution after a breakdown in winter.
Sources and further information
- SwissEnergy / Swiss Federal Office of Energy (SFOE): Operation, maintenance and replacement of heat pumps
- The Buildings Programme: cantonal subsidy logic (as of 2026)
- Energiefranken: Subsidy programmes by location
- Swiss Heat Pump Association (FWS): Lifespan, maintenance and replacement
