Medium
E047 on Navien NCB500 NCB500-1S+/30K

Your boiler is temporarily suspending operation because its internal temperature sensors are reading incorrect or conflicting water temperatures.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Book a service

This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

What the manual says

Manufacturer manual

Inaccurate water temperatures from inside the boiler.

From this model's manual
Verified against the Navien/Navien Ncb500 Combi Service Manual30k En 250331 Pdf installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Related fault codes

E046View →E048View →E049View →

All 60 fault codes on the NCB500 NCB500-1S+/30K

Seeing a different code? Every code this model can display, in one place.

001003004012016030031046047109205218302352353407421515517593594615740782E001E003E004E012E016E030E031E046E109E110E205E218E291E302E351E352E353E407E421E434E439E441E445E480E515E517E593E594E598E615E740E782E783E787E788

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