BoilerFaultCodesThe 6 most common faults
Your boiler has detected that there is not enough water in the system to operate safely and has shut down as a precaution.
Locate the filling loop (the flexible silver hose) underneath the boiler.Slowly open the one or two taps on the filling loop until you hear water entering.Monitor the pressure gauge and close the taps once the needle reaches between 1.0 and 1.5 bar.
Your boiler has tried to light itself three times but failed, meaning your heating and hot water have stopped working.
Check if your gas meter has credit and the isolation valve is open.Ensure other gas appliances in your home, like a hob, are working correctly.Press the Reset button on the boiler control panel to clear the lockout.
Your boiler has detected that the water pressure inside the system has become too high, causing it to shut down to prevent damage.
Locate a radiator in your home with a bleed valvePlace a cloth and container under the valveSlowly open the valve to release air and a little water until the pressure gauge on the front of the boiler drops to between 1 and 1.5 barEnsure the valve is securely tightened once finished
Your boiler has stopped working because the amount of water inside your heating system is too low to run safely.
Locate the external filling loop (a flexible silver hose) underneath the boiler.Open the valves at both ends of the hose to slowly let water into the system.Monitor the pressure gauge on the front of the boiler until the needle reaches 1.5 bar.Close both valves firmly and ensure the hose is disconnected if required.
Your boiler has stopped because the water pressure inside the heating system has dropped too low to operate safely.
Locate the external filling loop, which is a flexible silver hose connected to two valves under the boiler.Slowly open both valves to let mains water into the system until the boiler gauge reads 1.0 to 1.5 bar.Firmly close both valves and check for any leaks.
Your boiler has detected that the water pressure inside the system is outside of the safe operating range, so it has shut down to prevent damage.
Locate the filling loop (a silver flexible hose with one or two valves) underneath the boiler.Gradually open the valve(s) to let water in until the pressure gauge on the front panel reads between 1.0 and 1.5 bar.Tighten the valves firmly and check to ensure the pressure remains stable.
on the Heatline Capriz Plus
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 Heatline 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