Vaillant · ecoTEC plus
F.24 boiler fault code
ecoTEC plus combi
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Renting? Report it to your landlord or housing provider first. They are responsible for gas safety and boiler repairs, and the repair should not cost you.
What F.24 means
F.24 indicates that the temperature is increasing too quickly. The manual warns that some shared-table codes may not be visible on every product variant.
Safe check
Read and note the displayed code and visible pressure without opening the casing. Do not purge, adjust the pump, or attempt an internal check.
When to contact an engineer
F.24 remains or returns; arrange a Gas Safe registered engineer to investigate circulation and temperature control.
Safety notice
A boiler fault code alone is not a gas or carbon-monoxide emergency. If you smell gas, a CO alarm sounds, anyone feels unwell, or there is an unsafe flame, leave and call 0800 111 999 from outside.
Source and provenance
- ecoTEC plus combi and system Installation and Maintenance Instructions · 0020244997_07 · Appendix E, F.24, printed p. 62
installation and maintenance instructions
15/07/2021 · document 0020244997_07