I have a Vokera Linea 28 Combi (quite old) and I am getting the 01 - Failure to ignite error code at various times both with hot water only setting and hot water and heating setting. I am a landlord and my tenant says they have been switching the boiler off and only putting it on when needing hot water. I first of all noticed there was no pressure so I let more water into the system which was fine, however I noticed a drip started to come from up inside the left hand side of the boiler and dont know if it's a seal of something. Can anyone advise me what to do as I am short on cash and don't want to waste money if possible.