The DHW has stopped working on my Biasi M90D.24S boiler.
The boiler fires up and the CH works OK, but when I use the taps, the water runs tepid then goes cold - no hot at all.
Any pointers? It would be helpful to know what I'd dealing with before I call out an engineer.
Thanks
The boiler fires up and the CH works OK, but when I use the taps, the water runs tepid then goes cold - no hot at all.
Any pointers? It would be helpful to know what I'd dealing with before I call out an engineer.
Thanks