BoilerFaultCodesYour boiler's computer memory has developed a technical fault, preventing it from remembering the settings it needs to operate safely.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: EEPROM ERROR The contents of the EEPROM are not correct
What causes this fault?
This fault occurs when the data stored on the boiler's internal memory chip becomes corrupted or unreadable. The most common reason is a power surge or a gradual component failure on the main circuit board, which effectively causes the boiler to 'forget' its critical safety and operating instructions.
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.
Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like A16 — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.
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.
Affiliate links — we may earn a commission at no extra cost to you.