I have a Vaillant VC GB 182EH bolier, 15 years old. It has developed a slight leak - 2 or 3 drips per minute. No change in the sound of the boiler. It seems to be coming from a joint in the lower part of the boiler but I am worried it is a heat exchanger leak. How do I tell if this is the case ? Is it safe to leave on, there is no loss of pressure and heating and hot water are fine.
Clive
Clive