Medium
9E on Viessmann Vitodens 200-W WB2C 26kW System

The boiler has detected that fluid isn't circulating properly through the solar panels on the roof, so it has stopped using them to heat water, though the boiler itself will usually keep running for heating and hot water.

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 flow rate in collector circuit or flow rate too low, or temperature limiter has responded

From this model's manual
Verified against the Viessmann/Viessmann Vitodens 200 W Wb2c Service 5692857 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 82 fault codes on the Vitodens 200-W WB2C 26kW System

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

4C9A9b9C9F1018202830384044485051585990919293949899A7b0b1b5b7b8bAbbbCbdbEbFC1C2C3C4C5C6C7C8CdCECFd6d7d8dAdbdCdddEdFE0E1E3E4E5E7E8EAEbECEdEEEFF0F1F2F3F8F9FAFCFdFEFF

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