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Heat-pump repairs & fault diagnosis

Heat pump not working properly? Let's find out why.

Tell FLO what has changed, when it happens and what your system is doing now. That helps us plan the right fault checks.

Tell us what is happening with your system. FLO will get back to you about the next step.

FLO air source heat pump installed beside a brick Scottish property

The answer you need

What information helps a heat-pump repair enquiry most?

The exact fault code, equipment model, what has stopped working, recent changes and previous interventions help the team choose a safe first response and prepare for diagnosis.

The property-specific checks

How will FLO find the problem?

We use these details to work out what is practical, what needs more investigation and what the next step should be.

01

The symptom

Record what changed, when it happens and which services are still available.

02

The system

Identify plant, controls, emitters, cylinder and any backup heat source.

03

The history

Review installation, servicing, previous faults and recent setting or building changes.

The next step with FLO

Tell us what is happening. We'll work out what to check.

Describe the fault or performance issue first. FLO will discuss the appropriate checks and any proposed work with you before you decide.

Useful details to share
Exact controller message or codeMake and modelWhat still worksUrgency and safe access information
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01

Triage from supplied evidence

02

Safe diagnostic plan

03

Fault findings and repair scope

04

Escalation where another trade or manufacturer is required

Good to know

Questions you may have.

Should I reset the system?+

Follow only the normal user instructions for your equipment. Record the code first and avoid repeated resets that may hide a persistent issue.

Can a controls problem look like a heat-pump fault?+

Yes. Schedules, sensors, valves and hot-water priority can affect operation, which is why diagnosis considers the wider system.

Can every brand be repaired?+

Parts, warranty status, manufacturer support and technician competence vary. Submit the details so support can be confirmed before a visit is promised.

What might change the recommendation?+

Do not remove covers, work on electrics or disturb refrigerant equipment. Emergency hazards, leaks or burning smells need the appropriate emergency response rather than a normal web enquiry.

Original guidance and sources +
Energy Saving Trust: Heat pumps: everything you need to know UK Government: Fluorinated gas guidance for users, producers and traders

Talk to FLO

Just have a question?

Have a question about an existing system? Tell FLO what is happening and we'll point you to the right next step.