Aller au contenu
The energy one stop shop — active across Belgium
Service · breakdown repair

Repair & breakdown of your heat pump

Heat pump stopped, error code, no more hot water or a permanently frosted unit? Our technicians give you a clear diagnosis, hand you a firm quote, then repair fast — all brands, without waiting for the heating to come back.

Within a few days heating emergencies prioritised
All brands Daikin, Atlantic, Viessmann…
Clear diagnosis firm quote before repair
wendows technician diagnosing a broken-down heat pump
Fast responseWallonia & Brussels
Firm quotebefore any repair
Common breakdowns

The breakdowns we repair most often

Most heat pump breakdowns come down to a few well-identified causes. Our technicians diagnose them fast and know which parts to bring.

Refrigerant leak

A charge that escapes makes the heating power drop until it stops. We locate the leak, repair the circuit and recharge the refrigerant to standard.

Compressor & start-up

Heat pump that no longer starts, trips the breaker or stops at once: we test the compressor, the capacitor and the power electronics before replacing whatever needs it.

Outdoor unit constantly frosted

Defrosting that no longer happens blocks thermal exchange. We check the 4-way valve, the defrost sensor and the cycle to restore normal operation.

Control error codes

E1, E5, communication fault… each code points to a precise cause. We read the code, trace it back to the origin and fix it rather than simply resetting.

Circulation pump & pressure

Dropping circuit pressure, blocked circulator, air in the installation: we restore the water flow so the heat reaches the radiators or the underfloor heating.

Faulty probe or sensor

A distorted temperature probe throws off the control and causes stops or overconsumption. We test and replace the faulty sensors.

How it works

From diagnosis to guaranteed repair

  1. Diagnosis

    The technician reads the error codes, measures the pressures and temperatures and identifies the real cause of the breakdown, not just the symptom.

  2. Firm quote

    You receive a clear price for the repair, parts included, before any intervention. No nasty surprise on the bill.

  3. Repair

    With your agreement, we repair or replace the faulty part, recharge the refrigerant if needed and put the heat pump back into service.

  4. Warranty

    We check that everything works, explain the origin of the breakdown and the repair is guaranteed. Parts and labour documented.

A few days usual response time
All brands air-to-water, air-to-air & geothermal
Firm quote before any repair
100% technicians based in Belgium
Repair or replace?

We tell you frankly whether the repair is worth it

On a recent heat pump, repair is almost always the right call. On an old, out-of-warranty unit piling up breakdowns, we also price the replacement so you decide with full knowledge of the facts.

  • Honest diagnosis: we do not repair the irreparable
  • Comparative repair / replacement quote when relevant
  • Usage advice to keep the breakdown from coming back
See preventive maintenance →
Photo — error codes being read on a heat pump control panel
Is your heat pump broken down?

The sooner we diagnose, the sooner the heating comes back. We prioritise total losses of heating in cold weather.

Frequently asked questions

Heat pump repair

Do you work on heat pumps you did not install?

Yes. Our technicians service and repair all brands of heat pumps — air-to-water, air-to-air and geothermal — regardless of the original installer. Tell us the brand and model so we arrive with the right parts.

How much does a heat pump breakdown repair cost?

A diagnostic intervention with call-out falls within a range announced in advance. The repair itself is the subject of a firm quote handed over before any intervention, parts included: you know what to expect before you give your agreement.

What is the response time if I have no more heating?

We generally respond within a few days in Wallonia and Brussels, and treat as a priority total losses of heating during cold weather. Describe the symptom precisely and any error code displayed: it speeds up the diagnosis.

Is the repair guaranteed?

Yes. The replaced parts and the labour are guaranteed, and the intervention is documented. If the breakdown comes from a fault covered by a still-valid manufacturer warranty, we flag it so you benefit from it.

Diagnosis

The signs of a broken-down heat pump

Just one of these symptoms can signal a breakdown. Better a quick diagnosis before a complete stop.

  • An error code shows up and does not clear after a reset
  • The heating starts and stops in very short cycles
  • An abnormal noise comes from the compressor or the fan
  • There is no more heating or hot water at all
  • The outdoor unit stays frosted and no longer defrosts
  • The heat pump trips the breaker or the residual-current device
  • Refrigerant or oil is seeping around the refrigerant circuit
  • The heating power has dropped suddenly, for no reason
Indicative prices

How much does a breakdown repair cost?

2026 ranges — the repair is confirmed by a firm quote after diagnosis
Service Range Typical lead time
Diagnosis & call-out from 90 € A few days
Refrigerant leak search from 180 € 3–5 days
Refrigerant top-up on quote 3–5 days
Part replacement (probe, capacitor…) on quote Depending on part
Compressor replacement on quote On order
Out-of-contract repair from 110 € A few days
For renovation work (home over 10 years old), VAT 6% applies to the labour and supplies related to the repair.
Customer reviews

They chose wendows

5.0/5 · 3verified reviews

« Châssis, panneaux et pompe à chaleur en une seule fois : on a eu un seul devis, un seul planning et zéro paperasse pour les primes. Le résultat est impeccable et notre facture d'énergie a chuté. On ne pensait pas que ce serait aussi simple. »
Famille DuboisWavre · Brabant wallon
« Passage du mazout à une pompe à chaleur air-eau. Chantier propre, anciens radiateurs conservés. La maison est mieux chauffée pour bien moins cher. »
Ahmed B.Charleroi
« PAC air-air réversible installée avant l'été. Confort été comme hiver, et le SAV répond vite. Très satisfait du suivi. »
Nathalie F.Verviers

A heat pump to repair?

Tell us the brand, the model and the symptom (or the error code): we offer you a fast time slot and a clear diagnosis, firm quote before repair.

Reply within 24 working hours No obligation Grants & 6% VAT handled