Your boiler's main internal computer has encountered a startup failure and cannot control the heating process.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Electronic card start error.
What causes this fault?
This fault occurs when the boiler's main control board fails to complete its initial self-check during the startup sequence. It is typically caused by a critical hardware failure within the electronic circuitry or a loose connection in the wiring that prevents the computer from communicating with the rest of the boiler's components.
DIY fix possible
Locate the Reset button on the control panelPress and hold the Reset button for 3 to 5 secondsWait for the boiler to complete its restart sequence
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 rE98 — 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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