Emergency
87 on Viessmann Vitodens 050-W B0KA-30-M

The water pressure in your heating system has risen above the safe level, so the boiler has switched off to protect itself, and it needs checking before it is used again.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Act immediately

Turn off your boiler and stop using gas appliances. Call a Gas Safe engineer now. This fault can be dangerous if ignored.

What the manual says

Manufacturer manual

System pressure too high

From this model's manual
Verified against the Viessmann/Viessmann Vitodens 050 W B0ha B0ka 6194588 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 is a emergency severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Related fault codes

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All 131 fault codes on the Vitodens 050-W B0KA-30-M

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

781314495057585962636467686970717273747577788995104142161163182183184299346347348349350351352353354355357359361364365366367369370371372373374375376377378379380381382383384385386387388393394399400401402403404405406408410416417418425446447448449450451452453454455456457458461462463464467468471474527528540574575576577578579682683684694738766767799979980981982E10E12

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