A diagnostic-led approach to heat pump performance issues

Klymatec provides professional diagnostics, servicing and repair for heat-pump systems that are running but not performing as they should, commercially and for domestics homes.

Our work focuses on identifying why a system is underperforming before any remedial work is proposed. This avoids guesswork, unnecessary intervention and repeat problems.

All site visits are carried out personally by senior engineers, ensuring consistent standards, clear communication and accountable outcomes. Engineers assigned to Klymatec contracts are F-Gas certified and authorised to complete compliant refrigerant work.

When we’re typically called out

We are commonly asked to attend when heat pumps:

• Turn on but don’t heat effectively
• Struggle to reach or maintain temperature
• Cycle frequently or inconsistently
• Ice up or defrost excessively
• Run continuously with poor output
• Are noisy, inefficient or costly to operate

These issues usually indicate faults within the refrigeration system, controls or commissioning, rather than simple breakdowns.

What we work on

We support a range of heat-pump systems, including:

• Air-to-air heat pumps
• Air-to-water heat pumps

Our work focuses on the refrigeration system, where most performance and efficiency issues originate.

This includes:

• Refrigerant charge and system balance
• Leak detection and investigation
• Sensor, pressure and control-related faults
• Commissioning and setup issues
• Performance and efficiency assessment

Clear system boundaries

Heat-pump systems combine refrigeration with a heating distribution system.

Klymatec specialises in the refrigerant side of the system — diagnosing and repairing faults that affect how the heat pump produces heat.

Where issues are identified within the heating distribution system (such as emitters, pipework or system design), these are clearly identified and documented so the correct next steps can be taken.

This ensures responsibility is clear and problems are not absorbed into vague or open-ended work.

Diagnostics before repairs

Every heat-pump visit starts with structured diagnostics.

This allows us to:

• Identify the root cause of poor performance
• Confirm whether issues are refrigerant-side or elsewhere
• Explain findings clearly
• Recommend appropriate next steps

Repairs are quoted separately and only carried out with approval.

Servicing, repairs and recommissioning

Where faults are identified, we can undertake approved works within scope, including:

• Refrigerant-side repairs
• Leak repair and recommissioning
• Performance optimisation
• Control and sensor fault resolution

If testing shows that a system is no longer viable or economical to repair, this is explained clearly, with suitable options outlined.

Who this service is suited to

Homeowners with existing heat-pump systems

Larger or higher-demand homes

Schools and education settings

Care environments and supported living

Professional buildings with heat pumps in regular use

This service is ideal for clients who value experience, accuracy and clear technical reporting over quick fixes.

Book a heat-pump diagnostic visit

If your heat pump is running but not delivering the performance you expect, the first step is a proper diagnostic visit.

This allows informed decisions to be made based on evidence — before any repair or replacement is agreed.