What does the Vaillant F.87 fault code mean?

Your boiler has lost the internal connection needed to detect the flame, so it has safely shut down to prevent any gas buildup.

How much does it cost to fix Vaillant error code F.87?

Typical repair cost for the Vaillant F.87 fault is £120-250 including labour.

Manufacturer manual

Fault: Electrodes. Electrodes not connected or they are connected incorrectly, short circuit in the cable harness

Shared across the ecoTEC plus range

This code is shared by the boilers in this range, which use the same control board. It may not be printed in this exact variant’s manual.

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

Boiler cover options

A cover plan would handle faults like F.87: no call-out fees, no surprise bills.

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