BoilerFaultCodesThe 6 most common faults
Your boiler has started to light but the flame has gone out unexpectedly, causing the system to shut down for safety.
Check that your gas stopcock is fully open and other gas appliances like a hob are working.If it is freezing outside, check if the white plastic condensate pipe leading outdoors is frozen and thaw it with warm water.Press the 'Restart' button on the front of the boiler control panel.
Your boiler has detected that the electrical power coming from your mains supply is too low for it to operate safely.
Check if other appliances in your home are struggling or if lights are flickeringTurn the boiler off and back on again to see if the voltage has stabilisedContact your electricity network provider to see if there is a known power issue in your local area
Your boiler has become too hot or water is not moving through the system properly, causing it to shut down for safety.
Check that your radiator valves are open and not turned to zero.Ensure your external heating pump is running if you have one.Reset the boiler by turning the control knob to the 'RESET' position and then back to 'ON'.
Your boiler has tried to light several times but cannot establish a flame, meaning it has shut down for safety purposes.
Check that your gas prepayment meter has credit (if applicable).Ensure your gas stopcock is fully open and other gas appliances like your hob are working.If it is freezing outside, check that your condensate pipe (the plastic pipe leading outside) isn't frozen and thaw it with warm water.Push the reset button on the front of the boiler once to restart the ignition sequence.
Your boiler has locked itself out because it has been reset too many times in a short period to protect its internal components.
Turn the boiler power off at the fused spur switch (the wall switch).Wait for at least 30 seconds.Turn the power back on to clear the lockout memory.
Your boiler has sensed that the water is heating up too quickly or isn't moving through the system properly, causing a large temperature difference that has forced the unit to shut down for safety.
Ensure all radiator valves (TRVs) are turned to their highest setting to allow water to flow.Check that any external zone valves are opening correctly.Verify that the system pump is running and hasn't become stuck.Bleed all radiators to remove trapped air that could be blocking circulation.
on the Ideal Logic+ Heat H
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 Ideal 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
Avoid the next call-out bill
Monthly cover means no unexpected bills when your boiler breaks down.
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