Medium
9E on Viessmann Vitodens 200-W B2KB-35

The boiler's solar heating panel circuit isn't circulating fluid properly, so it has shut that part down as a safety precaution, though your main heating and hot water may still work.

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

No or inadequate flow rate in collector circuit, or temperature limiter has responded.

From this model's manual
Verified against the Viessmann/Viessmann Vitodens 200 W B2hb B2kb 5792013 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

9FView →9DView →

All 89 fault codes on the Vitodens 200-W B2KB-35

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

9A9b9C9F10181920283038505158597071737475768080/EE8181/EE8282/EE838485909192939495969899A3A7A9B0b1b5b7B8bFC1C2C3C4C5CdCFd3d4d5d6d7d8E0E1E2E3E4E5E7E8E9EAEbECEdEEEFF0F1F2F3F8F9FAFbFCFdFEFF

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