BoilerFaultCodesYour boiler's internal computer brain has developed a memory error and cannot process the instructions needed to run 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 | Cause: Electronic fault
What causes this fault?
This fault occurs when the boiler's main control board suffers a hardware failure, specifically within its internal memory chip. It is essentially a digital communication breakdown where the boiler can no longer store or read the vital settings it needs to operate safely. The most common reason is age-related degradation of the electrical components or a sudden power surge that has corrupted the circuit board.
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 F.63 — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.
Vaillant Ecomax 613 2 E is discontinued — time for a new one?
Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.
Affiliate links — we may earn a commission at no extra cost to you.