Worcester Bosch Oil Heatslave Switch On Problem

[heatslave]

Help Please

We have a 2005 Worcester Bosch Oil Heatslave 26/32 that is fitted with the optional timer. Recently we have a problem.

To get either the heating or hot water to switch on the timer has first to be set for both to be ON but this just prepares the unit as neither will switch on at this stage. If we now switch OFF either the water or heating the one that is left switched on starts working. This worked perfectly for a short while but now is getting unreliable.

The question is what is causing this and needs to be replaced. The obvious answer is either the timer or the control panel but which of them - or is it something else entirely?

 

[SimonG]

Is it the square white timer built into boiler? Pile of poop, loads of problems and expensive to just swap out like for like.
Need it testing though to rule out pcb.

Just had a look, I'd be supplying and fitting at about £270, whereas a LP722 including fitting would be about £120.

 

[heatslave]

Is it the square white timer built into boiler? Pile of poop, loads of problems and expensive to just swap out like for like.
Need it testing though to rule out pcb.

Just had a look, I'd be supplying and fitting at about £270, whereas a LP722 including fitting would be about £120.

It is a Worcester Bosch panel that repaces the simple switch panel that is the standard fitment.

I have, somewhere (!!!), the original switch panel. I will try replacing the timer with that panel & see if the boiler switches reliably.

If it is the timer is the LP722 a good reliable replacement.