Alpha cb28 boiler issues

[Ceolalba]

Hi, over the past few weeks I have been having issues with a 1 second flashing b light and that turns to a red a light coming on,
i need to turn power off and on constantly just to get hot water for a shower,
looking online it says it's the temperature sensor but people have said there could be a pipe full of sludge ?
any help would be appreciated.
thanks

 

[Paulplumb]

My advice would be to call in a Gas Safe registered engineer to rectify the issue.

 

[Rickster123]

This plumbing forum will not provide advice to anybody with regards to boiler repairs or any other form of gas plumbing without you first providing us with your Gas Safe Registration number in a thread - for very obvious reasons. If you're not qualified to touch gas, you should stay well clear of trying to!

 

[Alpha man]

It'll be the usual problem, that your GSR will be able to deal with!

 

[Dotty]

Job 38.11