Is your Vaillant ecoTEC displaying a boiler fault or error code?
Are you experiencing a fault with your boiler? If so, call our 24 hour UK call centre. Mr Boiler Repairs is 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.
FO Flow-NTC open circuit
F1 Return-NTC open circuit
F10 Flow NTC short circuit
F11 Return NTC short circuit
F13 Tank NTC short circuit
F20 Safety temperature limiter by NTC activated
F22 Dry fire
F23 Water shortage, temperature difference between flow and return
F24 Water shortage, temperature rise too quick
F27 Incorrect sensing of flame
F28 Appliance does not start, ignite during start failed
F29 Flame goes off during operation and subsequent
F32 Fan speed variation
F49 eBUS under voltage
F61 Gas-valve control defective
F62 Gas valve shut off delay
F63 EEPROM error
F64 Electroncis/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 value
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
Con No communication to the main board
Please note that this information is for guidance only and you seek technical advice.
Here are some things to consider helping repair your Vaillant ecoTEC boiler.
In the hydroblock, there’s a white plastic filter. Intended to protect the plate. It would be easier to remove the plate and flush it out than remove the filter. You are able to access this via the sensor housing, you will also need to remove the flow connection from the main heat exchanger.
Faulty pressure sensor
No modified part available. Remove and clean thoroughly. This should be black and not orange.
ecoTEC main heat exchanger
The problems with these are them blocking up. Your heating system needs to be in pristine condition. Engineers state its best to fit a filter on the return. Remove and wash if there is evidence of bits in your system.
These vessels are always empty. These can display the F.25 fault code
If you need a Gas Safe service engineer to repair your boiler then book a boiler repair today.
Vaillant Boiler Manuals / Instructions
Download a copy from our library, if your boiler is not listed Contact us and we will do our best to help you.