No hot water

Hi can anyone tell me why my hot water is intermittent please
I've got a baxi 105e it's had a new diverter valve and diaphragm and recently a new ntc thermister on the CH pipe , could it be the DHW thermister if so is this a drain down on my boiler to change

Many thanks Graeme

 

Plate heat exchanger is a new one , thanks for that , is the thermister hard to change on the DHW valve

Cheers again Graeme

 

Plate heat exchanger it is then mate , although i might start with the cheapest option first

Thanks for your time cheers Graeme

 

Right update on the plate heat exchanger , that's ok so I'm stuck now , any other ideas ??

Cheers Graeme

 

Because I've had a plumber round , he's removed it cleaned it , took about an hour replaced it and it's still doing the same , he's gone away to have a think , I just thought I'd tell ya that's all , I'm just after opinions now tbh before I decide to get a new one , but I don't want to go down that road just yet

Cheers Graeme

 

Thanks for that , I'll mention that to him when he comes back tomorrow

Cheers Graeme

 

Sorry just a Quick question you said 45 mins DIY , how did you change it please

Graeme

 

Thank you, will read and digest

Graeme

 

Hi, update on my DHW.when i turn the CH dial off my hot water is excellent , very hot constant as well ,but as soon as i turn the CH dial to where i normally have it for the heating my water problems come back , very strange

Thanks Graeme