If you’ve invested in a heat pump for your home, regular servicing is essential. It helps protect your system’s efficiency, keeps electricity bills under control, maintains your manufacturer’s warranty, and extends the lifespan of the unit.
At Sterio Renewables, we recommend servicing your heat pump annually.
This applies to all heat pump systems, including:
- Air-to-water heat pumps
- Air-to-air heat pumps
- Underfloor heating systems
- Radiator-based systems
- Retrofit installations
- New-build properties
The reality is simple. A properly designed, correctly commissioned, and regularly serviced heat pump should provide years of reliable, efficient heating with very few issues.
Problems typically arise when servicing is neglected, systems are poorly commissioned, or settings are altered without understanding how the system was originally designed to operate.
What Happens If You Don’t Service a Heat Pump?
One of the biggest misconceptions we encounter is that heat pumps are completely maintenance-free.
They are not.
While heat pumps generally require less maintenance than some traditional heating systems, they still need regular inspection by a qualified professional who understands:
- Refrigeration systems
- Heating systems
- Controls and automation
- Commissioning procedures
- Flow rates
- System design
- Fault diagnostics
We regularly visit homes where homeowners believe their heat pump has been serviced every year, yet nobody has actually assessed how the system is performing.
The filters may have been cleaned and the outdoor unit washed down, but critical performance checks were never carried out.
A proper heat pump service should assess:
- Flow rates
- Coefficient of Performance (COP)
- Water quality
- Heat emitter performance
- Expansion vessels
- Refrigerant pressures
- Electrical components
- Control settings
- Overall system efficiency
Without these checks, it’s impossible to know whether your heat pump is operating as efficiently as it should.
A Real-Life Example From an Irish Home
We recently attended a property where the heat pump had not been serviced in more than ten years.
The outdoor unit had become heavily overgrown with bushes and vines. Vegetation had grown into the unit itself, surrounding the compressor and electrical components. The rear coil was heavily contaminated with dirt and debris, restricting airflow.
By the time we arrived:
- The fans had failed
- The PCB required replacement
- Early compressor issues were developing
Interestingly, the system was still heating the home.
However, it was operating extremely inefficiently.
The homeowners had gradually become accustomed to rising electricity bills and declining performance because the deterioration had happened slowly over time.
Following our inspection, we recommended replacement rather than repair due to the overall condition of the unit.
Once the new heat pump was installed and properly commissioned, the system’s COP improved significantly, operating above 4.0 rather than struggling along inefficiently.
The homeowners immediately noticed:
- Lower electricity bills
- Improved comfort levels
- Better hot water performance
- Quieter operation
This is a perfect example of how proper servicing and commissioning directly affect both efficiency and running costs.
The Biggest Heat Pump Problem We’re Seeing in Ireland
One of the most common issues we encounter today is misinformation.
Homeowners often find advice online through social media, forums, Facebook groups, YouTube videos, or AI-generated content suggesting they should:
- Change temperature settings
- Disable controls
- Alter schedules
- Modify installer settings
The problem is that every heat pump system is unique.
A properly designed heat pump is configured around:
- The property’s heat loss calculation
- Radiator sizing
- Underfloor heating design
- Pipework sizing
- Flow rates
- Domestic hot water requirements
- Heat emitter performance
Changing settings without understanding the original design can seriously reduce efficiency.
We have attended properties where COP values had fallen as low as 1.1 simply because settings had been adjusted based on advice found online.
When it comes to heat pumps, generic advice rarely works.
Why the “Low and Slow” Approach Works Best
Many homeowners still treat a heat pump like an oil boiler.
They regularly:
- Switch the system on and off
- Increase and decrease temperatures throughout the day
- Use heating schedules designed for traditional boilers
Heat pumps work differently.
A properly designed heat pump system is intended to:
- Run steadily
- Maintain a consistent indoor temperature
- Modulate gradually
- Operate quietly in the background
This approach delivers the highest efficiency and greatest comfort.
The objective is not rapid bursts of heat. The objective is stable, consistent comfort.
Constantly turning a heat pump on and off forces it to work harder to recover lost temperature, increasing electricity consumption and reducing efficiency.
What Causes High Heat Pump Electricity Bills?
Many homeowners assume high electricity bills automatically mean there is something wrong with their heat pump.
Sometimes that’s true. Often, it’s not.
While heating costs naturally increase during colder weather, other factors can significantly affect electricity consumption:
- Incorrect system settings
- Poor commissioning
- Undersized radiators
- Immersion heaters running unnecessarily
- Backup electric heaters activating
- Poor flow rates
- Blocked strainers
- Excessive hot water usage
- Developing system faults
Domestic hot water production is often one of the largest energy demands placed on a heat pump because higher temperatures are required than for space heating.
As a result, households with significant hot water usage will naturally consume more electricity.
What Is Included in a Proper Heat Pump Service?
At Sterio Renewables, a heat pump service involves far more than a visual inspection.
Our servicing process includes:
- Filter and strainer cleaning
- Water quality testing
- Flow rate checks
- Heat emitter assessments
- Thermostat and control testing
- Expansion vessel inspections
- Electrical safety inspections
- Refrigerant leak checks
- Refrigerant pressure testing
- System performance analysis
- COP analysis
- Hot water performance testing
- Plumbing inspections
- Overall operational assessment
Most importantly, we take the time to explain the system to the homeowner.
Many people tell us they were never properly shown:
- How their heat pump works
- Why specific settings exist
- How to operate it efficiently
- What warning signs to look out for
We believe education is an important part of every service visit.
Warning Signs Your Heat Pump Needs Attention
If your heat pump develops any of the following symptoms, it’s important to arrange an inspection as soon as possible:Rising electricity bills
- Repeated fault codes
- Poor hot water performance
- Cold rooms
- Unusual noises
- Pressure drops
- Short cycling
- Freezing issues
- Any sudden change in performance
Avoid repeatedly resetting the system and hoping the issue will resolve itself.
Small faults identified early are usually far less expensive than major component failures.
Not All Heat Pump Service Engineers Are Heat Pump Specialists
This is an important distinction.
There are excellent refrigeration engineers in Ireland.
There are excellent plumbers in Ireland.
However, a true heat pump specialist needs expertise in both disciplines.
That includes understanding:
- Refrigeration systems
- Flow rates
- Heating design
- Heat emitters
- Controls
- Water quality
- Commissioning
- Fault diagnostics
If an engineer can clean the outdoor unit but cannot diagnose a heating system issue, you may still require a second contractor if a fault develops.
How to Choose the Right Heat Pump Company
Before choosing a company to install or service your heat pump, ask the following questions:
- Will they provide ongoing servicing?
- Do they offer long-term support?
- Can they diagnose faults as well as maintain the system?
- Do they understand both refrigeration and heating systems?
- Are they available after installation?
- Do they work with recognised manufacturers?
- Do they stand behind their workmanship?
Be cautious of unusually low prices.
Poor design, inadequate commissioning, and limited aftercare can become very expensive over the lifespan of a heat pump system.
Heat pumps represent the future of home heating in Ireland.
When properly designed, commissioned, and maintained, they provide exceptional comfort, excellent efficiency, and reliable performance for many years.
However, like any heating system, they require regular professional servicing.
At Sterio Renewables, we believe homeowners deserve:
- Honest advice
- Proper commissioning
- Professional servicing
- Long-term support
Because the goal is not simply installing a heat pump.
The goal is providing a heating system you can rely on for years to come.
Need Your Heat Pump Serviced?
If your heat pump is due its annual service, or if you’re experiencing issues with efficiency, performance, or running costs, our team can help.
Contact Sterio Renewables today to arrange a professional heat pump service anywhere in Ireland.
