Hi, I have an Ideal mini S28 System boiler. the problem I'm having is the CH works fine but if i press for DHW, the boiler cuts out. If I call for DHW only, the boiler fan/pump starts and the motorised valve starts. But just as you think the boiler is going to fire up - Nothing. When I put the boiler into system mode the lamps (x3) tell me its a Faulty Primary Circuit fault (No water or absence of flow).
Now, I'm no expert (If I was, I wouldn't be typing this I suppose), but please correct me if I'm wrong, the thermistor and the Primary circuit flow switch cannot be at fault if the CH is working. I was going to change them but then this occured to me, so I didn't. Could be the PCB or the Main switch membrane ? but in case it 's not, what else could it be?
Any suggestions would be appreciated greatly.
Now, I'm no expert (If I was, I wouldn't be typing this I suppose), but please correct me if I'm wrong, the thermistor and the Primary circuit flow switch cannot be at fault if the CH is working. I was going to change them but then this occured to me, so I didn't. Could be the PCB or the Main switch membrane ? but in case it 's not, what else could it be?
Any suggestions would be appreciated greatly.