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Gh rick I have a Halstead ace gh when I turn the boiler on…

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High rick I have a...
High rick I have a Halstead ace high when I turn the boiler on it tries to run but the flow switch pin doesn't lift I've changed both diaphragms but no joy any ideas please thanks Rupert
Submitted: 2 years ago.Category: UK Plumbing
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Answered in 13 hours by:
2/20/2016
Plumber: Brian, Plumber replied 2 years ago
Brian
Brian, Plumber
Category: UK Plumbing
Satisfied Customers: 872
Experience: 16 yrs. experience as plumber, including full bathroom and kitchen installations.
Verified

How much water flow per minute are you getting from a hot tap thats close to the boiler just run a tap for 30 seconds into a bucket and let me know the litres please.

Its often the plate heat exchanger thats causing the problem.

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Customer reply replied 2 years ago
Hi Brian I'm getting eight litres in 30 seconds
Customer reply replied 2 years ago
Hi Brian this afternoon I took the pump off to make sure the impeller wasn't blocked but it wasn't also I took the new flow diaphragm out to make sure I'd fitted it correctly & noticed it was about 3 times as thick as the old one so replaced it with the old one as there was no hole in it now the pin lifts half way but not enough to make the flow switch work ps I tried the pump while it was off & it runs fine I hope this can shed some light on the matter yours Rupert oh & I had bought a new dhw heat exchanger last week so I put that on to
Plumber: Brian, Plumber replied 2 years ago

Yes 16 litres a minute is very good, I am going to opt out for you hopefully you can get a resolve to this problem soon.

Brian

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Plumber: Andrew Smith, Engineer replied 2 years ago
Andrew Smith
Andrew Smith, Engineer
Category: UK Plumbing
Satisfied Customers: 3,783
Experience: Domestic Gas, Commercial Gas, LPG, Unvented Hot Water, Part P Electrical, Commercial Catering
Verified

Hot water, heating or both?

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Customer reply replied 2 years ago
Hi Andrew its both regards rupert
Plumber: Andrew Smith, Engineer replied 2 years ago

So when the pump runs the pin does not lift fully and when the tap is run the other pin does not raise fully?

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Customer reply replied 2 years ago
that is correct andrew
Plumber: Andrew Smith, Engineer replied 2 years ago

You need to strip and clean the divertor and pipework if the pump is clean and unrestricted - it is the lack of water flow causing the pins not to rise high enough

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Customer reply replied 2 years ago
Thankyou I'll try that as soon as I get a chance and put some fernox f3 or something similar and run it for a week or so regards rupert
Plumber: Andrew Smith, Engineer replied 2 years ago

No problem, if that does not cure it then you may have to strip and clean or replace

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Customer reply replied 2 years ago
Hi Andrew what flushing fluid would you recommend for a really good clean out of the system or should I go for a power flush
Customer reply replied 2 years ago
hi Andrew I forgot to tell you that I took off a couple of rads to replace some broken valves and flushed them through with the shower pipe in the bath and loads of black crud came out of them so I'm gonna do all eight kindest regards ***** ***** the way I bought my daughter a divorced barbie for her birthday, it came with all ken's stuff ¿;}
Plumber: Andrew Smith, Engineer replied 2 years ago

Ok, once you have flushed everything then treat the water with MB1 to prevent this happening again.

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