worcester bosch 28cdi

[sueprend]

Hi,happy new year can any body help?my worcester bosh 28cdi hot water has stopt working red light dose not light up when h/w tap is turned on c/h works fine warm water from h/w tape when heating is on so can use shower any help appreciated...
Richie

 

[twgas]

diverter valve is the place to look first.

 

[sueprend]

diverter valve is the place to look first.

not sure what too look for diverter valve ur?????

 

[Terrywookfit]

It's behind the plate heat exchanger at the R/h side.

 

[sueprend]

It's behind the plate heat exchanger at the R/h side.

how do u check if it is faulty i have pressed the switch at the back of the diaphram(i think??) and the hot water come on dose this mean the diaphram is knackered....thank terry.

 

[Terrywookfit]

Open a hot tap and check that the plunger is depessing the micro switch.
If not the diaphragm is cream crackered!

 

[sueprend]

Open a hot tap and check that the plunger is depessing the micro switch.
If not the diaphragm is cream crackered!

thanks terry tried that and the plunger is not moving enough to make the micro switch is it a big job in other words exspensive...richie

 

[Terrywookfit]

I consider it to be one of the worst jobs I do.

Definatately worth a fixed price repair from BG.

 

[ianniann]

The parts are not (too) expensive, but the location on this boiler is tricky. Also it is a "wet" job Sometimes you can adjust the microswitch position so that it operates again, but chances are if it has stopped working that the diaphragm is failing or has completely failed.

 

[jackecole]

why is it hard to replace the diaphragm? fiddly??

 

[Terrywookfit]

By the time you have stripped every thing out to get to it, You may as well change the complete valve.

 

[jackecole]

i've never changed one - is it fiddly changing the whole valve? or just 5 compression fittings or other?

 

[sueprend]

I consider it to be one of the worst jobs I do.

Definatately worth a fixed price repair from BG.

thanks for your time and advice wish you all the best for the new year....richie.

 

[Terrywookfit]

i've never changed one - is it fiddly changing the whole valve? or just 5 compression fittings or other?

Drain boiler And h&c supplies.
Remove filling loop,Plate heat exchanger by pass Etc.
Remove valve and manifold.
Replace seals and o rings.
Reassemble in reverse order.
Usually fitted in some corner or awkward space that makes it a TOTAL Barsteward.

If you have hands like a tart it may be easier.
Unfortunately mine are not.

 

[keego]

And when you reassemble it throw a bucket of silicone grease at every O ring.