Wow. I had the O-Ring in the wrong place and wondered why for 2 hours I couldn’t get the clip back in. Thanks for this video really helped me! Clip went back in nice and easy!

Got one of these to do later this week. I’m confident I could have figured it out but after watching this video I no longer have to. Looks very straightforward. Thank you.

Thank you,great help this morning when mine failed and started leaking. Easy and inexpensive fix due to your help and advice in this short clip

Hi Geoffrey, I'm not a plumbing or Boiler engineer, but my plumber seemed flummoxed by my 4 year old Greenstar 38CDI. So much so I decided to diagnose the problem myself. (I have 40 years of troubleshooting experience in electro-mechanical and electronics). CH works fine, great flow, fast heat and spot on temperature control. DHW another story, Water runs hot for a few minutes then gets cold, then periodically gets luke-warm. I turned off the CH, by turning the control dial on the boiler to * (Antifrosting). Then I turned the DHW control to max and ran a hot tap. The boiler didn't fire up, no pump, no fan and no ignition. After a moment the boiler did start, but not immediately (Within 5 seconds it took a good minute) when presented with a DHW demand. I operated the ECO mode, and ran the hot tap once more, ice cold water and the periodic heating stopped. The periodic heating of hot water is preheat I believe, which maintains a small amount of water hot in the system to reduce transit time to the demand HW tap. This cycle is maintained by a thermocouple temperature signal and burner / fan modulation by the controller. All this tells me there is no demand generated to fire the boiler in DHW mode. The demand is generated by a small Flow turbine, which I believe in in series with cold water supply flow into the DHW side of the H/E. Since Preheat works and regulates correctly, I can assume the control system, DHW thermistor and diverter valve are all functioning correctly. (Diverter valve must be ok since the CH does not heat up when turned off and the hot tap is run) By my analysis of the symptoms, the fault lies with the Flow Turbine, either electrically or mechanically unserviceable, the, or the Turbine output signal not being processed by the control board? (So either the control board or the Flow Turbine sensor are U/S). I deduced all this with no test equipment, just the DHW Block schematic of the Boiler. Is my analysis path correct, are the components I suspect the most likely cause in your opinion? Because my Plumber wants to replace the Heat Exchanger. I expected him to call me this morning before he collects the H/E he ordered, but he hasn't.

Thanks for your advice on the phone earlier, Geoffrey - greatly appreciated. And top page! Brilliant selection of videos. I’m sure I’ll be leaning on them in the future. Cheers, Luke.

I was amazed they chose a plastic that detereates for the old version of the flow adapter... great video to watch before the job, problably would have been fiddiling with it for ages to work out the new style of part !

Merry Christmas and a Happy New Year to you. Thanks for the great vids!

Your videos have saved me more than once thanks for your time

The best flow turbine vid, thank you so much

Cheers Geoffrey , Another out the park video. Thanks mate :-)

Tanx for the upload always enjoy your videos plz do some fault finding ones 👍

Thanks for this advice 😃,I'm new with breakdowns this should be really helpful.

Another great video Geoff , a happy and prosperous new year to you.....

Great vid never done anything like this before and I cant get a plumber so will give it a go today Thanks for the help ...Fingers crossed

Happy new year and thanks for sharing ...nice video as usual ...

thanks from canada .worked great..the clip was a bit fussy ..thanks again

thank you my friend. this video has really helped me today, your the best, regards andy

Good job from Spain

Professionally done

Thank you very much , you are great.🙏

Thanks for the vids

Love the tunes

Yet another very good reason to buy a Baxi combi boiler…..or anything other than a Worcester lol 😂

Thanks very much.

Replaced mine as shown but still leaks but less so. O rings are correctly positioned. Does the flow sensor have o rings too?

So where did you put the white washer in the end that comes in the pack that was shown? Many thanks

I don’t have a leak, but Need to open Hot Water tap to Maximum to get the DHW to come on! Would replacing the flow turbine adapter help? Thanks!

Hi, is that a CDI Classic you are working on, what are the symptoms of a faulty turbine adaptor. Thanks.

I have to remove and replace the entire return unit, what a pain in the a$$. Thanks Worcester, composite sucks. Video was very helpful never the less.

Did this one have a filter mesh in the cold water inlet, I didn’t see it in the video?

Great videothanks so much. Hot watwe pressure has gone down after this. Why? Please help. Thanks

can anyone tell me what the difference between the mk1 and mk2 diverter motor

The correct name for this component is " The Dissolving Flow Turbine Adaptor". The joke is the green diverter motor drip cover which WB put on instead of making the adaptor from better materials. Sometimes you can't make it up.

Can you do a video on what has cause or issue to replace the flow turbine?

Good instructive video apart from the unnecessary mind numbing music.

I'm fitting one tomorrow, I hope the unit does have a pin hole or is split.