Boiler won't fire up: common causes and what to do in Barcelona
Riesgo medio · con precaución
Resumen rápido
Usually low pressure or a reset error code.
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¿Qué está pasando?
A boiler needs gas, power and pressure.
Causas más probables
Low pressure
altaGauge <1 bar: fill to 1.2 bar.
Gas off or shut valve
mediaCheck if the stove has gas.
RCD tripped
mediaNo power = no ignition.
Flue blocked
bajaNest or leaves in the flue.
Faulty sensor or electrode
mediaCodes E01/E02: technician.
Pasos de diagnóstico
- 1
Check the pressure gauge
Fill to 1.2 bar and close.
- 2
Check error code and reset
Note the code and press reset 2–3s.
- 3
Check gas and power
Verify gas and breaker panel.
⚠ Parada de seguridad: If you smell gas: shut valve, ventilate, call 112.
Cuándo llamar a un profesional
If it persists, call official service.
Want us to take a look? Fixed quote within 24 h.
Coste orientativo
70–320 €
Visit + diagnosis + small part.
Contexto local
In Barcelona, sealed boilers are mandatory since 2007.
Preguntas frecuentes
Why does it lose pressure on its own?
Valve, leak or expansion vessel.
How often service it?
Annual service, 4-year inspection.
Related problems
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