Halstead ace ( WICKES 102) combi boiler power light flashing

[adam911]

Hi i was wondering if anyone can help. I have a halstead ace combi boiler and whenever i turn the central heating on it runs for few seconds and the power light flashes. Once resetted i then tried the dhw and that fires up perfectly and works. Its only when central heating is in demand the boiler stops running and power light flashes. Could it be the ch thermistor.

I did change the bigger diaphragm last year i believe its called flow switch diaphragm its the bigger one out of the two.

What can i check?

 

[adam911]

Here is the manual for it. Thanks

 

[adam911]

Can anyone help please?

Boiler runs a bit longer on ch when system is cold but when it warmer it cuts out and it cuts out straight away after resetting it and trying again? Just get a flashing power light. As said before dhw is fine and that doesn't cut the boiler out. Anyone?

 

[adam911]

Agile can you shed any light on this one?

 

[muggles]

You could have helped yourself here by reading the manual you posted. If you follow the fault finding guide on Page 26 it tells you that a flashing power light is either low water pressure or a duff flow switch.

 

[adam911]

Hi thanks for the reply.
I once replaced the one diaphragm in the flow switch body 7 months ago which i believe pushes the diaphragm and spindle to the left to make contact with micro switch. The diaphragm had a hole in it and was replaced and all was well again and dhw was working again.

There is another smaller diaphragm at the top of the diverter valve which i didn't change i believe thats the primary flow switch which the spindle pushes the micro switch to ch. I'm assuming that diaphragm is ok as when i turn the ch on the spindle pushes the ch micro switch and boiler tries to fire but then turns off after a few seconds flashing power light on the control panel? Which is indicating replace flow switch.

Ive read the fault finding bit but its useless as when i turn hot tap on the boiler runs fine which also tells me pump is working too otherwise both ch and dhw wouldn't work if the pump was faulty.

 

[holty]

I know what that fault is.

 

[adam911]

I know what that fault is.

Do share

 

[holty]

Give us your gas safe reg number and i will.

 

[adam911]

Im not gas safe registered its my own boiler and im not touching gas or gas valves or burners etc.. if it did involved gas i would get someone in no question about it. Im just looking at the water/plumbing side of things?

So what you reckon?

 

[adam911]

Done it. Got heating again. Holty thanks for your help.

 

[Andrew Needham]

How did you get the heating back on?