TAKING FOREVER TO GET HOT WATER - HALSTEAD COMBI

99JASON99 · 26 Mar 2007

MY BOILER IS A HALSTEAD FINEST COMBI AND IT SEEMS TO TAKE AN ETERNITY TO GET HOT WATER. I HAVE TAKEN THE MICROSWITCH ASSEMBLY OFF AND OPERATED THIS MANUALLY AND THIS MAKES THE BOILER FIRE UP STRAIGHT AWAY. THE PROBLEM SEEMS TO LIE WITHIN THE ASSEMBLY WHERE THE LITTLE FLOW OPERATED PLUNGER COMES OUT TO SWITCH THE MICROSWITCH AS THIS PLUNGER TAKES A VERY LONG TIME TO START MOVING. ANY IDEAS WOULD BE MOST WELCOME, CHEERS!

pannierstan · 26 Mar 2007

Divertor valve knackered, or certainly diaphragm anyway.

P.S STOP SHOUTING ASWELL (Try hitting your CAPS key again)

Stan

99JASON99 · 27 Mar 2007

For some time the boiler has been firing up every ten minutes or so, for about fifteen seconds even though there has been no call for heat or hot water. Could this also be attributed to a faulty diverter valve?

ChrisR · 27 Mar 2007

Yep. Switch faulty.

99JASON99 · 28 Mar 2007

Based on this diagnosis, would you advise a new diverter valve or is it likely that this can be overcome with a new diaphragm? As I have found a diaphragm set for £12.50 and the entire valve is about £100!

ChrisR · 28 Mar 2007

It isn't a diagnosis - for that you have to investigate!

I "mended" a faulty microswitch the other day by taking it apart and cleaning it - van was 10 minutes away and I couldn't be bothered...

99JASON99 · 16 May 2007

pannierstan said:
Divertor valve knackered, or certainly diaphragm anyway.

[http://www.ezypart.co.uk/parts/part_id__2109]

Would this be the one I need?

werewolf · 16 May 2007

is there any signs of water /dirt in switch or on the dv valve where pin exits?
If so ,this will cause the switch to short circuit fetching the boiler on without demand. Remedy is ti fit new dv valve internal kit.Pain in tha arse if you haven`t got the right sized spanner.Oh and change water section diaphragm while your at it.

Paul

99JASON99 · 16 May 2007

No signs of dirt at all, the pin seems free on the dhw side. I have not had the DV valve in bits yet, would signs of dirt/water cause the boiler to fire up every five to ten minutes with no call for heat or hot water as this has been happening. Why do you need to change the water diaphragm aswell as the internal kit?

werewolf · 17 May 2007

Have had this prob with water in switch housing caused by leak where pin exits dv. If dry could just be dud switch.
As for diaphragm ,if you have stripped it down anyways why not ?

99JASON99 · 17 May 2007

So would the most likely cause be the microswitch or the diverter valve diaphragm? To me it seems more probable that its the microswitch given the boiler firing up regularly without call?

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TAKING FOREVER TO GET HOT WATER - HALSTEAD COMBI

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