I have a Vaillant Repairs web page especially for repairs to these boilers, which has some photos and information on the most common type of faults found on the ecoTEC range, with a section on various Fault Codes that might flash up on the boiler display. To maintain the boiler guarantee it is essential that the boiler is serviced annually, please make sure at time of visit that the Installation and service booklet has been left open, so we can record our service visit in the Benchmark section at the back.
Services I provide include Boiler Breakdowns, Boiler fault finding, Boiler Service to Vaillant and Worcester Bosch Boilers. If your boiler is making noises or is leaking I can help. Your heating system may not be coping with the winter weather, you need a local expert heating engineer. If you live near me in NW1, NW2, NW3, NW5, NW6, NW10, NW11, then call Tony on 07831 623711 for all your heating problem needs.
All gas appliances in your property need to be safety checked by a Gas Safe registered engineer annually and serviced according to manufacturer's instructions. Any appliance left unchecked could leave you at risk of carbon monoxide poisoning. It's an extremely good idea to have your gas pipework inspected at the same time as having a gas safety check, every year - and it's law if you're a landlord. An appliance service will include all of the above checks and tests and any other specific checks, for inspection and/or cleaning of the appliance as specified and detailed in the appliance manufacturer's instructions.
Potential causes include, leaks on pump, auto air vents, diverter valves ( leaking when moving from heating to hot water modes ), Condensate drainage or if dripping outside then the pressure relief valve is letting by. Some of the probable causes include, pump failure, diverter valve ( mechanical or electrical defect ), hot water flow switch, heating or hot water sensors playing up, printed circuit board electrical defect. Usually in the back of the installation and service booklet you will find the information to decode what's on display.