worcester 28i junior

[mikegas]

Going to above boiler later this evening for a friend the boiler is not working in ch mode but fine in hw. If everything is calling for heat am i right in thinking diverter valve is the problem and if so how do i prove the fault before replacing the part because im not sure which type of diverter valve is in this boiler, thanks

 

[wnjswozo]

might be a time/control/stat problem

 

[mikegas]

do you know which terminals i need to link out to prove that, is it is it neutral and live supply or neutral live return?

 

[Mbear]

do you know which terminals i need to link out to prove that, is it is it neutral and live supply or neutral live return?

U link out the 'live out' to 'live in' ie to and from the stat/timer

so if the boards sending 240v out to the controls (live out) it should recieve it back to the board(live in) with all controls calling for heat. Linking these 2 together will prove if the controls are faulty or not

 

[quality]

U link out the 'live out' to 'live in' ie to and from the stat/timer

so if the boards sending 240v out to the controls (live out) it should recieve it back to the board(live in) with all controls calling for heat. Linking these 2 together will prove if the controls are faulty or not

No experience of a 28i then

 

[coley]

or just unplug the timer from the face panel

coley

 

[Mbear]

No experience of a 28i then

how do you come to that conclusion smarta**e?

Firstly, I am not saying that the controls are definitely at fault, i was merely telling the OP roughly how to link out the ext controls.

Secondly, the only thing I can't recall offhand is whether the voltage from the pcb to controls is ac or dc. If you wana get technical, link out terminals Ls - Lr on the strip ST2 at the pcb. This will prove if the controls are faulty or not. In saying that it could still be a board fault, ie not giving power out. Personally I'd remove the timer/stat facia and link them out on their back panels as it's usually less time consuming.

Keep ur smarmy comments to yourself next time plz

 

[oldplumber]

no slapping or hair pulling girls lol

 

[fuzzy]

im no expert at breakdowns but isnt the diverter on these a simple electroinc paddle type? i wouldnt expect it to break. it would point to the board wouldnt it?

 

[Mbear]

im no expert at breakdowns but isnt the diverter on these a simple electroinc paddle type? i wouldnt expect it to break. it would point to the board wouldnt it?

It's not got a diverter valve mate. It's a dual pass heat exchanger. The hw operates throught a paddle turbine. But the OP says it's the heating at fault not the water. It could be the pcb at fault but I'd guess it wud be the ext controls