Medium
9E on Viessmann Vitodens 200-W B2HA-49

The boiler has noticed that the solar water heating part of the system isn't circulating properly, so the solar panels may not be adding heat to your hot water, though your main heating and boiler should still work normally.

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 or flow rate too low in the solar circuit, or temperature limiter has responded.

From this model's manual
Verified against the Viessmann/Viessmann Vitodens 200 W B2ha 49 60 5817254 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 B2HA-49

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

4C9A9b9C9F1018192028303838:≠0404448505890919293949899A3A4A7b0b1b5b7b8bAbbbCbdbEbFC1C2C3C4CdCFd6d7d8dAdbdCdddEdFE0E1E2E3E4E5E6E7E8EAEbECEdEEEFF0F1F2F3F6F8F9FAFCFdFEFF

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