Halstead Finest No DHW

[Thesub]

Hi everyone

No hot water from my Halstead Finest this morning. Have had a look and when hot tap is run there is no movement from the pin which operates the DHW flow switch. Looking around the tinternet it would seem that the diaphram is a common failure. Boiler springs into life if DHW switch is closed manually and CH OK. Would appreciate any thoughts and tips on fitting if you agree with my logic.

Steve

 

[Mbear]

Defo the hw water dia if what your saying is correct about making the switch manually and it works.

U should be chuffed, hw dia is one of the cheapest repairs u get on boilers.

If u don't know what your doing, get sum1 in though mate

 

[Thesub]

Thanks Mbear

I'll order up a diaphram then. Doesn't look too difficult, but it's always worth asking people with experience if there's anything to watch out for.

Cheers

Steve

 

[Mbear]

Thanks Mbear

I'll order up a diaphram then. Doesn't look too difficult, but it's always worth asking people with experience if there's anything to watch out for.

Cheers

Steve

if your gona do it yourself remember to isolate cold mains inlet @ boiler before work and then open a hw tap (this takes all the water pressure away from the boiler)and leave it opened until work is complete and mains is back on.

More importantly turn the power off before work, better to be safe than.....

 

[Thesub]

if your gona do it yourself remember to isolate cold mains inlet @ boiler before work and then open a hw tap (this takes all the water pressure away from the boiler)and leave it opened until work is complete and mains is back on.

More importantly turn the power off before work, better to be safe than.....

Thanks for the advice. Is there any need to drain the primary side Mbear?

Ta

Steve

 

[Mbear]

Thanks for the advice. Is there any need to drain the primary side Mbear?

Ta

Steve

Not for that dia mate, just be careful but

 

[Thesub]

Not for that dia mate, just be careful but

Will let you know how I get on.🙂

 

[Thesub]

Have fitted diaphram and all working again.

Did have one small problem though. The pressure sensing pipes would not budge out of the diaphram housing (I had removed the clips🙂). Wasn't sure how much force they would take so I disconnected them from the other end where they came out easy. Anyone any tips on this - just out of curiosity.

Cheers

Steve

 

[Puddle]

You do not have to remove these small tubes/pipes,just isolate,remove diagram housing screws ,lever open ,tubes bend enough,fit diagram,grease spindle,advised and reassemble,tubes bend back into place,you can infact unscrew diagram holder from main diverter body,by loosening two grub screws and bend all, to make housing screws more accessible
Infact if you removed tubes and replaced,make sure holding clips refitted in well and possibly put a bit of wire round clips to keep in position and
stop falling out as new models have

imho

 

[Thesub]

You do not have to remove these small tubes/pipes,just isolate,remove diagram housing screws ,lever open ,tubes bend enough,fit diagram,grease spindle,advised and reassemble,tubes bend back into place,you can infact unscrew diagram holder from main diverter body,by loosening two grub screws and bend all, to make housing screws more accessible
Infact if you removed tubes and replaced,make sure holding clips refitted in well and possibly put a bit of wire round clips to keep in position and
stop falling out as new models have

imho

Thanks Puddle

You'll appreciate that I didn't want to subject them to that sort of treatment without knowing that this was OK. I have fitted new cable ties to the clips as original.

Fingers crossed no leaks at present.

Steve