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Vaillant Sine 18 T3 W - No hot water, CH ok?

I have a Vaillant Sine 18 T3 W. The boiler won't fire up when hot water tap is opened. Pressure OK, in fact since this happened the pressure at the tap has increased. CH is OK.

Can anybody point me in the right direction as to what it might be?

KenD
January 2011
VaillantVaillant Sine 18 T3 WHeating, Home Heating SystemsHot Water Tap
Hi Carefree.

Replaced the whole unit instead of replacing the diapham & stuffing gland. Everthing OK now.
Will repair the faulty one and keep it as a spare.

Many thanks for your help.

KenD

KenD
February 2011
Many thanks carefree for your valued help. I realised were it was after I put the question.

It's a shame Bill couldn't be as helpful.

KenD

KenD
January 2011
KenD
Underneath the boiler, central, toward the front, a silver valve with 4 water connections going to/coming from it.
The page I posted for Bill (who thought I was joking for some reason)? Has a picture of the valve, 4th item down (stuffing box shown too).

Carefree
January 2011
Why having a laugh Bill?
Laugh at this!

http://www.directheatingsupplies.co.uk/boilers/boilerspareparts/vaillantspareparts/?page=8

1st item

Carefree
January 2011
Thanks for the quick response

Just to be sure wear is it located.

KenD

KenD
January 2011
I think someone is having a laugh!!! Stuffing box????

bill
January 2011
Domestic diaphragm in the water section.
Worth replacing the stuffing box (often leaks too) on top of the water section too at the same time.

Carefree
January 2011

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Vaillant Sine 18 T3 W: No Hot Water - Help!