Worcester 28cdi help

[P4ULT]

Evening guys I have replaced a diaphragm on a 28 Cdi today as when the hot tap was running the the flow pipe was getting hot but I still have the same problem and I'm a little stuck. Worcester are suggesting the plate h/e could be the problem do you guys have any thoughts.

 

[P4ULT]

And the hot tap only runs Luke warm.

 

[Billy Bob Bob]

plate to heat blocked or scaled and you could also have a stuck/knackered diverter

 

[P4ULT]

The diverted operates the micro switch though. Is that still likely to be a problem I replaced the diaphragm so thought that would cure it is there any way to distinguish between the 2

 

[Billy Bob Bob]

The diverted operates the micro switch though. Is that still likely to be a problem I replaced the diaphragm so thought that would cure it is there any way to distinguish between the 2

the problem we face when diagnosing this fault is a blocked plate heat almost always causes this fault,however diverter valves have a safety spring that allows it to dump down to heating,this normally causes the DV to fail,i would try replacing or cleaning the plate heat first

 

[P4ULT]

Cheers gas man. When I took out the old diaphragm I was surprised as there was no split in the rubber.

 

[Billy Bob Bob]

no probs ,a diaphragm wont cause a boiler to dump down,it will just stop the micro switch activating

 

[P4ULT]

Went back this today replace plate to plate still same problem so replaced diverted valve hey presto don't think I'll be bothering with the diaphragm again.

 

[Billy Bob Bob]

Went back this today replace plate to plate still same problem so replaced diverted valve hey presto don't think I'll be bothering with the diaphragm again.

glad you got it sorted

 

[P4ULT]

Thanks for the advice got there in the end

 

[thereisawizza]

I don't tend to do just diaphragms anymore; the cust doesn't thank you when you change just the diaphragm and it works, they just moan when you change it and THEN tell them they need a whole diverter valve!

 

[P4ULT]

think you may be on to something there especially when they are a pain to access.