Baxi · 400 Combi 2.1
H.01.18 boiler fault code
400 Combi 2.1
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What H.01.18 means
No water circulation (temporary).
Gas Safe engineer: If the code recurs or the displayed pressure is not low, contact a Gas Safe registered engineer.
A boiler fault code alone is not a gas or carbon-monoxide emergency. If you smell gas, a CO alarm sounds, or someone has possible carbon-monoxide symptoms, leave and call 0800 111 999 from outside.
Safe check
Check the displayed pressure. If it is low, follow the Baxi 400 Combi 2.1 instructions to repressurise once.
When to contact an engineer
If the code recurs or the displayed pressure is not low, contact a Gas Safe registered engineer.
Source and provenance
- Baxi 400 Combi 2.1 Installation & Service Manual 7875578-02 · §11.2 Error codes: short list, printed p. 49; temporary faults, printed p. 51
installation and service instructions
7875578-02
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.
Did this fix it?
After: Repressurise the boiler