Your boiler's computer memory has developed a technical error, meaning the internal control system cannot process instructions correctly.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: EEPROM fault – electronics defective
What causes this fault?
This fault occurs when the boiler's internal memory chip, which stores critical operating instructions, suffers a data failure or hardware breakdown. The most common reason is an electrical surge or natural wear and tear on the circuit board's components, leaving the boiler unable to remember how to operate safely. Because the 'brain' of the appliance can no longer read its own programming, it shuts down the system entirely to prevent accidents.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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A boiler cover plan would cover faults like F.83 — 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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