I'm having an issue with my Ariston Eurocombi A23. Occasionally when using the shower, the hot water stops coming through after about 5 minutes. When looking at the boiler when this happens, the burners stop burning, yet the boiler still seems to be On, i.e. the extractor fan is on etc. When the shower is turned off, the boiler shuts down as normal. After a minute or two when the shower is restarted, hot water flows again, until again after about 5 mins the burners stop.
Before I get a CORGI in, does anyone have an idea about what could be causing this? Is it likely to be something relatively simple, or am I talking megabucks to fix?
Thanks.
Paul