BoilerFaultCodesDimplex No light indication Fault Code
Also written as NOLIGHTINDICATION — same fault.
The Dimplex No light indication fault code means: your boiler has no power and neither the display nor the lights are turning on, meaning the unit is not receiving electricity or a fuse has blown.. It appears on 1 Dimplex model in our database.
Technical description: Defective power supply
DIY fix possible
Check if your main consumer unit (fuse box) has tripped.Ensure the boiler's isolation switch (usually a red fused spur near the boiler) is turned on.Check if other appliances in the house are working to rule out a power cut.
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Dimplex models that show the No light indication fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Dimplex No light indication fault code information on this page is sourced and cross-checked against the official Dimplex service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026