No hot water in Rubí: what to check before calling
Resumen rápido
70% of the time it's the boiler or heater itself.
¿Qué está pasando?
When you open the hot tap, the boiler or heater activates.
Causas más probables
Low boiler pressure
altaGauge should read 1–1.5 bar.
Gas supply cut
mediaCheck if the hob lights.
Electric heater no power or broken element
mediaIf the RCD tripped, the element may be leaking.
Dirty flame sensor
mediaBoilers from before 2010.
Pasos de diagnóstico
- 1
Check the pressure gauge
If below 1 bar, fill to 1.2 bar.
- 2
Check if the hob has gas
If the hob won't light it's the gas supply.
⚠ Parada de seguridad: If you smell gas, leave and call 900 750 750. - 3
Check the error code on screen
Note the code and check the manual.
Cuándo llamar a un profesional
Call a gas technician if the boiler shows a persistent error.
Coste orientativo en Rubí
65–180 €
Diagnosis and common repair.
Contexto local · Rubí
In Rubí natural gas dominates.
Rubí grew in two clear waves: the old town and 1960s–70s residential estates, then a second new-build wave between 2000 and 2010 toward Sant Muç and Can Mir. The old town still has pre-2002 electrical installations we upgrade before any other work. The new expansion concentrates semi-detached homes with heat pumps that need yearly servicing. The historic Rubí stream floods mean we always check drainage and non-return pumps in ground-floor flats before closing up a bathroom. Wide streets, easy van access.
- Comarca: Vallès Occidental
- Población: 79.317 hab.
- Parque de vivienda predominante: piso-moderno
- Año medio de construcción: 1978
- Códigos postales: 08191
Crecimiento marcado por torres de los 70 en Les Torres y casas en Can Mir.
Preguntas frecuentes
How much to replace a boiler?
1,400–2,200 € for a mid-range brand.
Why does pressure keep dropping?
Expansion vessel or micro-leak.
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Más sobre Plumbing: leaks, blockages and water
Sources and regulation
- CTE DB-HS 4 — Suministro de agua — Código Técnico de la Edificación