D.97 Low
Your boiler is currently showing a hidden menu used by engineers for advanced system analysis, but it does not represent an actual mechanical fault.
Technical description: Activation of the second diagnostic level
Typical repair cost: £0 (including labour)
DIY fix possible
Press the 'Back' or 'Menu' button multiple times to exit the diagnostic screensWait for 15 minutes for the screen to time out and return to the main displaySwitch the boiler off and back on at the fused spur switch to reset the interface
Protect yourself from future repair bills
A boiler cover plan would cover faults like D.97 — no call-out fees, no surprises.
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