BoilerFaultCodesThe 6 most common faults
Your boiler has detected that the water pressure inside the system is likely too low to operate safely and effectively.
Locate the external filling loop, which is a silver braided hose connecting two pipes near your boiler.Open the valves on both ends of the hose to allow mains water into the system.Monitor the pressure gauge on the front of the boiler until the needle reaches the green zone (usually between 1.0 and 1.5 bar).Close both valves tightly and ensure there is no leaking from the filling loop.
Your boiler has detected that the water pressure inside the heating system is too low to operate safely.
Locate the external filling loop, usually two valves connected by a braided silver hose under the boiler.Gradually open the valves to let water into the system until the pressure gauge reads between 1.0 and 1.5 bar.Close both valves tightly and ensure the boiler resets its display.
Your boiler has failed to light the flame or detected an internal control error, so it has safely shut down to prevent gas from escaping.
Full guide for E010Your boiler has detected that it is running too hot and has automatically shut down to prevent damage to its internal parts.
Full guide for E020Your boiler has failed to ignite because it cannot detect a flame, meaning your heating and hot water will not work.
Full guide for E021Your boiler is failing to detect a flame, which means it cannot safely light to provide you with heating or hot water.
Full guide for E022on the Vokera Evolve S
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 Vokera 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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