Ariston · Clas ONE
112 boiler fault code
Clas ONE combi
Get a Gas Safe engineer
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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 112 means
Central-heating return temperature probe circuit open or short circuit.
Safe check
Note the code shown on the display and contact a Gas Safe registered engineer.
When to contact an engineer
Contact a Gas Safe registered engineer to diagnose this fault code.
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
- Ariston document 420010818500 · Table summarising error codes, printed p. 34
installation and servicing instructions
Official Ariston UK library copy; document 420010818500