Medium
F.87 on Viessmann Vitodens 222-F B2TF

Your boiler has stopped working because the water pressure inside the heating system is currently too high.

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

Burner in a fault state. Water pressure too high.

From this model's manual
Verified against the Viessmann Vitodens 222 F B2tf installation & service manual, page 93.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

DIY fix possible

Locate a radiator with a bleed valve and place a cloth underneathOpen the valve slightly using a radiator key to let water out until the pressure gauge on the boiler drops into the green zone (usually 1.0 to 1.5 bar)Close the valve and check the boiler display to see if the error code clears

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