BoilerFaultCodesYour boiler is having trouble creating the spark needed to light the gas or recognizing that a flame has started.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Electrodes fault
What causes this fault?
This fault occurs when the boiler's internal computer tries to light the gas but the spark isn't strong enough or the sensors fail to detect a flame. The most common reasons are worn-out ignition pins that have corroded over time or a loose connection in the wiring that carries the electricity to create the spark.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
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A boiler cover plan would cover faults like F.87 — no call-out fees, no surprises.
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Could it be time for a new boiler?
If repair costs are adding up, a new energy-efficient boiler could be the smarter long-term choice.
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