BoilerFaultCodesThe 6 most common faults
Your boiler has sensed that it is becoming dangerously hot and has shut itself down for safety.
Check that all radiator valves are fully openEnsure the system water pressure is between 1 and 1.5 bar on the gaugePress the reset button on the front of the boiler once
Your boiler has tried to light several times but has failed to detect a flame, meaning it has locked itself out for safety.
Check that your gas emergency control valve is open and you have credit on your meter.Check if other gas appliances, like a hob, are working correctly.Press the reset button on the front of the boiler according to the manual instructions.
Your boiler is failing to light or is losing its flame while running, which means your heating and hot water have stopped working.
Check if other gas appliances in your home, like a hob, are working to ensure gas is reaching the property.Ensure your gas pre-payment meter (if applicable) has sufficient credit.Try resetting the boiler by pressing the reset button to see if it clears a temporary glitch.
Your boiler has experienced a sudden loss of electrical power or a significant voltage drop, causing it to shut down for safety.
Check if there has been a local power cut or if other appliances have stopped workingCheck your home's consumer unit (fuse box) to see if a circuit breaker has trippedPress the reset button on the boiler control panel once power is restored
Your boiler was running but the flame went out unexpectedly, causing the system to shut down for safety.
Check if other gas appliances in your home, like a hob, are working to ensure gas is reaching the propertyCheck if your gas meter has credit (if using a pre-payment meter)Reset the boiler by following the instructions in your user manual
Your boiler's computer module has encountered an internal error and has stopped the heating to protect the system.
Locate the reset button on the boiler control panelPress and hold the reset button for five secondsWait for the boiler to restart and check if the fault code clears
on the Worcester Bosch Hideaway 90
Based on parts cited in our fault code database. Your engineer will confirm what's actually needed after diagnosis.
Call a Gas Safe engineer if…
- You can smell gas or see signs of a leak
- The Worcester Bosch shows an Emergency or High severity code
- The boiler keeps locking out after repeated resets
- You've tried the DIY checks and the fault hasn't cleared
- There's visible water leaking from the boiler
- The flame is yellow or orange instead of blue