grant combi

We have the above Oil Boiler. Had a selection of new parts fitted over the last 12 months (see below). Everything has been running fine for about 6 months since last repairs. Over the last couple of weeks, any time the CH is switched on, it fires and heats as it should but once the heating is...

Hi All, I posted on this subject back in 2018 and never really got to the bottom of it! But I have an issue where air seems to be trapped in the heat store/exchanger on the hot water side of things. It fizzes and gurgles, knocks and bangs in various degrees of loudness and frequency. At the...

Hi, I have recently had a Grant Vortex Blue 36KW boiler internal fitted and it seems to work OK but I have noticed that when the cold water is switched on, say in the bathroom, the boiler starts up like it is heating up the internal hot water store. It doesn't do it every time, but after it has...