BoilerFaultCodesKeston No Display Fault Code
Also written as NODISPLAY — same fault.
The Keston No Display fault code means: your boiler’s control panel has no power, meaning the system is completely unresponsive and cannot provide heating or hot water.. It appears on 1 Keston model in our database.
Technical description: The boiler screen is blank. Checks: 230 V AC supply to the boiler and wiring between the terminal block and the PCB.
DIY fix possible
Check if other appliances in the house are working to rule out a general power cut.Inspect your main fuse box or consumer unit to see if a circuit breaker has tripped.Check the fused spur switch near the boiler is turned on and the fuse inside is intact.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Avoid the next call-out bill
A cover plan would handle faults like No Display: no call-out fees, no surprise bills.
Affiliate links. We may earn a commission at no extra cost to you.
Keston models that show the No Display fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Keston No Display fault code information on this page is sourced and cross-checked against the official Keston service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026