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We have a Halstead Ace High combi boiler with a persistent intermittent fault. ( 3 months.)It keeps going to 'lock out' - Sometimes it can be restarted by resetting but not always. Sometimes while just running the heating but also it will lockout when using the shower. We have had a new PC board fitted and 2 leaks around the manifolds and micro switches have been repaired. Every possible pressure (gas

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  • c_whitehorn May 10, 2009

    The model number as far as I can see is 'Ace High'

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Hi,

You need to get a qualified 'Gas Safe' engineer to check the Venturi in the flue, and clean it out. The other thing to look at is the igniters, clean them wirth emery paper as this boier relies on flame rectification (ignite and sense flame)

The other important aspect which also hasn't been mentioned is to check the inlet and working pressure (as i have had a faulty gas meter governor before)

Quite often the simple faults are overlooked and everyone goes for the PCB, It is doubtful it's a loose wire on the gas valve, The best advice is to get a gas engineer in and for him to call Halstead while on site.

Be very careful when working on your own gas boiler, as any mishaps, and your house insurance is void.

Posted on Jul 10, 2009

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What is the model number? Do you know the fault number?

Posted on May 10, 2009

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Posted on Jan 31, 2012

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Hi,
Well there seems to be lot of faults in ur applicance and my advise would be to go to service center as there are lot of problems in it and as well as it been for quite some time.You will not be able to handle all this.

Thanks!
Sandy

Posted on May 14, 2009

  • Sandeep Gupta May 14, 2009

    but before it u can try this
    The problem may be with loose electrical connection to the gas valve
    inside the boiler which appeared to be not allowing the gas to flow
    through thus not igniting and so the cut out operates after several
    attempts. there is a wiring diagram on the inside panel and the
    connecting block was visibly loose so it was easy to see but i wouldnt
    advise you to go fiddling around inside and certainly shut off the
    supply if you do open the panel.


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Hi, my halstead ace high boiler has started losing pressure and when i top it up to put the heating on after 10 mins the pressure is high whats wrong with it?


Probably a waterlogged expansion tank. The tank provides a springy air cushion for the water to push against as it expands, and the air pushes back as the water contracts. This scheme minimizes the pressure change that would otherwise be caused by expansion and contraction of the water, giving the water somplace to go when it expands. If the air cushion is gone ... big pressure swings.

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Whining = pump bearings
Pressure reduction = pressure relief valve diaphragm either perished of gunged up - look for water coming out of the overflow pipe from the valve
leak in ch system look at all joints

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sounds basic, but make sure the electrode is in the pilot flame
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disconnect and join wires together for temporary override check and run boiler.

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