BoilerFaultCodesThe 6 most common faults
Your boiler has stopped working because the amount of water inside your heating system has dropped too low.
Locate the external filling loop, which is a silver braided hose connecting two pipes underneath the boiler.Open the small valve on the filling loop to allow water into the system while watching the pressure gauge.Close the valve firmly once the needle on the pressure gauge reaches the green zone, typically between 1.0 and 1.5 bar.
Your boiler is not turning on because it isn't receiving a signal that a flame has successfully lit.
Check that your gas meter supply valve and the gas isolation valve near the boiler are both fully open.Check if other gas appliances in your home, such as a gas hob, are working to confirm gas supply.Locate the Reset button on the boiler control panel and press it for a few seconds to attempt a restart.
Your boiler is trying to start but the flame is not igniting, meaning you currently have no heating or hot water.
Check that your gas supply is working by testing another gas appliance like a hobEnsure the gas isolation valve near the boiler is turned to the fully open positionPress the RESET button on the front control panel once to attempt a restart
Your boiler is trying to start but the flame isn't catching, meaning you currently have no heating or hot water.
Check that your gas meter control valve is turned to the 'on' position.Ensure any gas isolation valves located underneath the boiler are fully open.Press the reset button on the boiler control panel once to attempt a restart.
Your boiler has stopped working because it cannot light the internal flame needed to heat your water or radiators.
Check that your gas supply is on by ensuring other gas appliances like a hob are working.Verify the gas isolation valve near your boiler and at the main meter are both in the open position.Press the RESET button on the boiler control panel once to see if it restarts.
Your boiler is not receiving enough gas or failing to ignite, meaning it cannot produce heat or hot water.
Check that your gas meter emergency control valve is turned to the fully open position.Verify the gas isolation valve located underneath the boiler is open.Check if other gas appliances in your home, such as a gas hob, are working to confirm gas supply.Press the 'Reset' button on the boiler control panel once.
on the Ferroli Optima 201
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 Ferroli 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