BoilerFaultCodesYour boiler's internal computer has encountered a glitch or a configuration error and cannot communicate properly with the system.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Software error
What causes this fault?
This fault occurs when the boiler's internal computer experiences a software conflict or a complete data failure. It is usually caused by a physical defect in the printed circuit board's memory or a sudden electrical surge that has corrupted the system's programming.
DIY fix possible
Locate the reset button or dial on the boiler control panelPress and hold the reset button for 5 seconds, then releaseWait 2 minutes for the boiler to restart; if the code persists, a professional must inspect the electronics
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 E13 — no call-out fees, no surprises.
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Ravenheat CS 80/90, WH System, WH 80/90 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.
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