BoilerFaultCodes
The most common Dimplex faults
Your boiler has become too hot and has shut itself down as a safety precaution to prevent damage.
Check that all radiator valves are fully openEnsure the boiler pressure is between 1 and 1.5 barPress the reset button on the front control panelCheck for any visible leaks around the pipework
Your boiler is failing to light the gas flame or keep it burning, which has caused the system to shut down for safety.
Check if other gas appliances in your home, like a hob, are working to ensure your gas supply is on.If you have a prepayment meter, check that you have sufficient credit.Try resetting the boiler by following the instructions in your user manual.
Your boiler is failing to light the gas, meaning it cannot create the heat needed for your heating or hot water.
Check that your gas emergency control valve is in the open positionIf you have a prepay meter, check that you have credit availablePress the reset button to see if the system restarts normally
Your boiler started to heat up but the flame went out unexpectedly, causing the system to shut down for safety.
Check that your gas emergency control valve is open and you have credit on your gas meterCheck if other gas appliances, like a hob, are working correctlyPress the reset button to see if the boiler restarts
Your boiler has shut down because the internal water temperature has become too hot.
Check that all radiator valves are fully openEnsure the boiler pressure is between 1 and 1.5 barPress the reset button and wait for the boiler to restart
Your boiler's internal computer has encountered a critical error or is failing to detect a flame, causing the system to stop working for safety.
Press the reset button once to see if the error clearsCheck that your gas pre-payment meter (if applicable) has creditEnsure other gas appliances in your home, like a hob, are receiving gas
Your boiler is struggling to push water through the system properly, causing it to shut down shortly after the flame starts to prevent overheating.
Check that all radiator valves are fully openEnsure the external pump is running if accessibleCheck the system pressure gauge and top up if below 1.5 barBleed all radiators to remove trapped air
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.
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.
Avoid the next call-out bill
Monthly cover means no unexpected bills when your boiler breaks down.
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