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My Vaillant ecoTEC Plus is displaying a boiler fault and error code.

Are you experiencing a fault with your boiler? If so, call our 24 hour UK call centre. MR Boiler Repairs are the UK’s leading boiler repair and service specialist, providing support for domestic, commercial and residential properties. Our low cost fixed price repair service will provide you with peace of mind and avoid any scary repair bills.

Are you experiencing a fault with your ecoTEC boiler? Below you’ll find information on the fault codes for your boiler and the possible reasons for the fault you are experiencing. The ecoTEC boilers have an inbuilt advanced multifunction diagnostic display to assist with fault finding in the unlikely event of a boiler malfunction.

Status and fault codes for the Vaillant ecoTEC Plus boiler

F27     Incorrect sensing flame

F29     Flame goes off during

F32     Fan speed variation

F49     eBUS under voltage

F61     Gas-vale control defective

F62     Gas valve shut off delay

F64     Electronics/NTC fault

F65     Electronics temperature too high

F67     Flame detector input signal is outside the limits 

F70     No valid DSN in display and/or main board

F71     Flow NTC reports constant valve

F72     Flow and/or return NTC fault

F75     No pressure rise was detected on turning on the pump

F76     Overheating protection on primary heat exchanger triggered

F77     Condensate pump or feedback of accessories blocks heating

F78     Wrong configuration with accessory

Con     No communication to main board 

Please note that this information is for guidance only and that you should seek technical advice.

If you need a Gas Safe service engineer to repair your boiler then book a boiler repair today.


Vaillant Boiler Manuals / Instructions

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