Viessmann · Vitodens 050-W
87 boiler fault code
Vitodens 050-W types B0HA / B0KA
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What 87 means
System pressure too high.
Gas Safe engineer: The code remains or returns after the step above, or no home step applies; arrange diagnosis by a Gas Safe registered engineer.
A boiler fault code alone is not a gas or carbon-monoxide emergency. If you smell gas, a CO alarm sounds, or someone has possible carbon-monoxide symptoms, leave and call 0800 111 999 from outside.
Renting? Report it to your landlord or housing provider first. They are responsible for gas safety and boiler repairs, and the repair should not cost you.
Safe check
Note the code shown on the display. Do not open, adjust or repeatedly reset the boiler. Contact a Gas Safe registered engineer.
When to contact an engineer
The code remains or returns after the step above, or no home step applies; arrange diagnosis by a Gas Safe registered engineer.
Source and provenance
- Vitodens 050-W types B0HA/B0KA · 6194588 GB · Fault messages, Cause column, code 87, p. 66
installation and service instructions
12/2022 · document 6194588 GB