Alpha cb24

[alli6968]

Hi all,
Please can some-one help.
I have the above boiler. Problem is I am getting no hot water or it goes hot then cold sometimes then goes hot again sometimes stays cold. Also now radiators are only getting warm and not hot like they used to.
Yellow led is normal when boiler idle but when you turn hot tap on or when you put heating on led first comes on constant as I believe it is supposed to do then starts flashing constantly.
Fault guide says Temp sensor fault.
Does this narrow it down to spacific part or could it be a number of parts.
If a number of parts could some kind person list what it could be.

regards in advance....

 

[past3bar]

May well just require new DHW thermistor but probably requires a new diaphragm in the diverter valve.
Buy the genuine one as although expensive comes with all the fibre washers & seals.
Can be a right pain with leaks so replace all the washers you remove!