biasi riva advance 110b.32s/c no hot water

[tonysp]

No hot water but heating is fine, I changed diverter valve, dhw flow switch and dhw heat exchanger still no hot water, however the boiler gets very excited when the hot water tap is switched on. Could it be that dhw heat exchanger i put in is for 24s?? I assume they both will fit.
Thank you

 

[Jordon]

Wow you changed half the boiler when you say excited what do you mean? Does the boiler light then drop off over and over or does it do nothing? Have you checked the diverted valves motor pin comes up, have you tested the thermistors/Dhw sensor?

 

[Agile]

Dont you think it would have been more convenient and economic to have called a boiler engineer to sort it out on the spot?

What does an excited boiler look like?

Tony Glazier

 

[tonysp]

Wow you changed half the boiler when you say excited what do you mean? Does the boiler light then drop off over and over or does it do nothing? Have you checked the diverted valves motor pin comes up, have you tested the thermistors/Dhw sensor?

Thank you

No boiler light stays on. The diverter valve motor pin operates only when I turn central heating off and leave hotwater thermostat on and turn on hotwater tap, but the boiler dos not fire up. However, when both water and heating the thermostats are on and I turn hotwater tap on the boiler fires up and bit higher (excited). But still no hotwater and the diverter valve pin does not operate.