Combi Boiler Hot Water not so hot... help please.

[Dougie212]

Hi there.

Need some help with oue Combi Boiler. It's a Valliant Combi Boiler.

Essentially, the boiler appears to be working fine. It heats the radiators superbly!!.. We had it serviced last year and the chap said it was in brilliant working order, and although getting on a little, was still in working perfectly well.

Our issue is that the hot water isn't working very well. It doesn't get overly hot. I have tried not opening the tap so much, so as to slow the flow rate down and this works a little, but with a pregnant wife who wants a proper hot bath... its not quite there.

Is there anything I can look at or try to get the water hotter? I notice there is a water temp dial under the boiler, but someonw appears to have mashed it with their water pump pliers.

Many thanks in advance!

Dougie212

 

[1two3]

Hi Dougie, our Vaillant combi has separate rotary control knobs for the hot water and heating (as would most boiler I would think?).

Why not simply pull off the knobs and swap them over to test it?

If the knobs don't pull off easy surely you must still be able to turn the broken knob by hand? (turn fully clockwise for max temp).

I stress I'm not a plumber etc but only just joined this forum myself so thought I'd chip in with something. Hope it's of some use

 

[Dougie212]

Thanks for your fast reply...

There is an adjuster for the water, but someone has taken the plastic cover off of it, and mashed the metal "tap" type knob thing.

I will try and adjust it... anyone else got any other ideas?

 

[Dougie212]

Untitled

• Dougie212
• 22 Dec 2010
• 2

Fingers crossed, this is a pic of the water temp adjuster, with it's crooked and squished knob.... tried turning it clockwise and anti.. and its not budging either way...

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[kilovolt]

It sounds like the valve has seized due to infrequent use ( you should turn this control both ways every few months to keep it free) but for now try some plus gas give it time to work then use mole grips tightly on spindle- may start moving if youre lucky,If not new vave time.Problem is made worse by the temp of incoming water.Regards J

 

[Dougie212]

Hmm... That could make sense with the water temp then if this is not performing... Thanks!!!.. On the off chance the plus gas wont work, is it a major job to fit a new valve? Where would I get one from?