Boiler repair in Barcelona
When a boiler fails, the urgent thing is restoring hot water and heating safely. We repair gas, oil and electric boilers, gas water heaters and electric hot water cylinders across Barcelona and the metropolitan area, with a clear diagnosis and a quote before we start work.
Quick answer
The most common boiler faults are low system pressure (a leak or a failed expansion vessel), no hot water (flow sensor, NTC or a limescaled plate heat exchanger), cold radiators (air or a seized pump) and safety lockouts showing fault codes. We repair at your home in Barcelona, with emergency callouts within 3 hours subject to availability.
Common faults and what we check
| Symptom | Likely cause | What we do |
|---|---|---|
| The boiler won't fire up | No electrical supply, a safety lockout, no gas supply, or failed electronics. | We check the supply, gas pressure, ignition electrode and board before replacing anything. |
| Low pressure, or pressure that keeps dropping | A leak on the heating circuit, an expansion vessel that has lost its charge, or a weeping pressure relief valve. | We pressurise and trace the leak, check the vessel pre-charge and inspect the relief valve. |
| Heating works but no hot water | Blocked flow sensor, failed DHW sensor, or a plate heat exchanger blocked with limescale. | We clean or replace the flow sensor and assess chemical descaling of the exchanger. |
| Cold radiators even though the boiler is running | Air in the system, a seized circulating pump, or seized thermostatic valves. | We bleed the system, free or replace the pump and free up the valves. |
| Fires up and shuts down repeatedly | Dirty flame sensor, flue pressure switch, or a boiler oversized for the demand. | We clean the electrode and sensor, check the flue and adjust the combustion settings. |
| Fault code on the display | Ionisation, overheat, flue or pressure faults, depending on the manufacturer. | We interpret your specific brand's code and isolate the responsible component before quoting. |
Service details at a glance
- Response time
- 24–48 working hours. Emergency callouts within 3 hours, subject to availability.
- Service area
- Barcelona city, the metropolitan area, Garraf and Baix Penedès.
- Warranty
- Written warranty on labour and any parts replaced.
- Quote
- Fixed price before we start. The diagnostic fee is deducted if you go ahead.
- Opening hours
- Monday to Friday, 9:00–20:00. Saturday, 10:00–14:00.
- Where we repair
- At your home or premises. No need to transport the appliance in most cases.
Emergency boiler callouts in Barcelona
We offer an emergency callout within 3 hours across Barcelona city, the metropolitan area and Garraf, subject to the availability of the mobile units we have working in the area. We prioritise jobs with no heating or no hot water, particularly in homes with young children or elderly residents, and in the depths of winter.
Boiler brands we work on
Junkers/Bosch, Vaillant, Saunier Duval, Baxi, Ferroli, Domusa, Roca, Ariston, Chaffoteaux, Cointra and other brands common in the Spanish market, subject to parts availability.
Important note: we are not the authorised service centre for any manufacturer. We are an independent callout repair company. If your boiler is still under the manufacturer's warranty, check with the brand's official service first so you don't invalidate it.
Safety: what to do if you smell gas
If you smell gas: turn off the isolation valve if you can do so safely, ventilate by opening windows, do not operate electrical switches or light any flame, leave the property and call your gas distributor's emergency line. Only arrange a technical inspection of the appliance once the installation has been made safe.
Advice that prevents most boiler faults
- Watch the system pressure: normally between 1 and 1.5 bar when cold. If it drops by itself every few days, there's a leak that needs finding.
- Don't ignore fault codes. Resetting repeatedly without diagnosing turns a small fault into a large one.
- Bleed the radiators at the start of each season if you notice cold patches at the top.
- Have it serviced regularly: it improves efficiency, cuts gas consumption and catches combustion problems before they become a hazard.
- Never block the ventilation grilles in the space where the boiler is installed.
How we work, step by step
1. Get in touch
Tell us the make, model and symptom by phone, WhatsApp or the form.
2. Diagnosis
We visit you, run a functional test and pinpoint the actual fault.
3. Quote
Fixed price before we touch anything. You decide whether repair is worth it.
4. Repair
Quality parts, functional testing and a written warranty.
Frequently asked questions
How quickly can you attend a boiler breakdown?
We offer an emergency callout within 3 hours across Barcelona city, the metropolitan area and Garraf, subject to availability, thanks to the mobile units we have working in the area. Jobs with no heating or no hot water are prioritised.
My boiler keeps losing pressure — what does that mean?
Either there's a leak on the heating circuit or the expansion vessel has lost its pre-charge. Topping it up weekly solves nothing and introduces fresh water carrying limescale and oxygen, which accelerates internal corrosion.
I have heating but no hot water — is that serious?
Usually not. The typical causes are a blocked flow sensor, a failed DHW sensor, or a plate heat exchanger blocked with limescale, which is very common given the hard water across the Barcelona area.
Do you repair gas water heaters and electric cylinders?
Yes, as well as boilers. On electric cylinders the typical faults are the element, the thermostat and a spent sacrificial anode.
Do you carry out the mandatory gas installation inspection?
No. We repair and service the appliance. The periodic inspection of the property's gas installation is the responsibility of your gas distributor or a registered installation company.
What should I do if my boiler shows a fault code?
Note it down and tell us when you call: it lets us bring the likely part on the first visit. You can try one reset, but if the fault returns, don't keep going — there's a real cause behind it and forcing it can make things worse.
Related services
Fridge repair
Cooling faults, thermostats, fans and compressors on domestic fridges.
Fridge freezer repair
Compressors, refrigerant leaks, control boards and frost free systems.
Freezer repair
Not reaching -18°C, temperature alarms, heavy frosting and door seals.
Oven repair
Elements, fans, thermostats, temperature sensors and control boards.
Gas hob and cooker repair
Ignition, thermocouples, safety valves and gas jets.
Ceramic and induction hob repair
Zones not heating, power modules, touch controls and error codes.