home Fix label Heating label_important Home Heating Systems category Vaillant

Vaillant boiler not heating water?

My vaillant cobin boiler is not heating water when the tap is on but is heating up fine for the central heating. THe only way to get hot water is to have the central heating on then you get a small amount but not enough for a shower. Any ideas on what it may be and how to mend it?

Thanks
Mark

Mark Ryder, June 2008

home Fix label Heating label_important Home Heating Systems category Vaillantdone

its definitely the diverter valve, had an engineer yesterday from storm heating, and he said it was checked it anc concluded the DHW need changing

Mark O, July 2008

Hi Mark,
Funny enough am Mark as well, and i am having the same problem, I had to rush out the shower this morning to switch on the the central heating just get the hot water running again. please tell me if it has been fixed and how?

Thanks
Mark O

Mark O, June 2008

sounds like scale or divert vavle gone or micro switch gone rember you must be corgi regs to paly with boilers

colin c.a.c gas heating, June 2008

Thanks, where would i find the dhw flow switch?

Mark Ryder, June 2008

the problem is the dhw flow switch is either crudded up or failed, clean or replace

T, June 2008

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