Resetting your Vokera boiler could fix the red light on issue but if not this video will help you find the cause and get your central heating and hot water going again.
Get free no-obligation boiler repair quotes from trustworthy installers near you → http://bit.ly/VokeraBoilerRepairQuotes
You could be seeing a red light on your Vokera boiler alongside the A01 error code, if so, this means that the boiler has failed to ignite. There are number of reasons why the A01 fault can appear on Vokera boilers, one being an issue with the gas supply. Don't attempt to fix any gas issues yourself, always hire a Gas Safe engineer.
Full list of Vokera boiler error codes and what they mean → http://bit.ly/VokeraErrorCodes