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Ed Sirett Ed Sirett is offline
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Default Vaillant TURBOmax Plus boiler: hot water problem

On Fri, 05 Dec 2008 00:33:42 -0800, Jim Walsh wrote:

I have a Vaillant TURBOmax plus combi boiler and I am experiencing an
intermittant problem with the supply of hot water from it. The central
heating function works just fine, but upon trying to draw hot water, the
boiler frequently supplies only lukewarm water. When the fault
manifests, adjusting the hot water temperature control on the boiler
makes no difference. The only thing I have found that seems to get it
working properly again (although not always at the first attempt) is
turning the boiler off and on again at the main switch. Some additional
info that may or may not be relevant: i) the problem occurs most
frequently in cold weather, ii) the boiler is mounted in an unheated
part of the house and iii) the boiler is about 8 years old.

Any help/suggestions gratefully received.

Thanks in advance, Jim.


I'd suggest from experience that if you can get an acceptable flow of HW
at times then this problem is absolutely the diverter valve.
The reset cause the system to recalibrate the motion of the diverter valve
thus giving a temporary releif to the symptoms.

To fix this fault you will need a new diverter valve (c. £100).


--
Ed Sirett - Property maintainer and registered gas fitter.
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