Valiant Eco-etc plus help!?

[SPMM1984]

Hello I have a valiant boiler eco-tech plus. The hot water is working fine however, heating no matter what temperature, goes into (what I think to be) anti-cycling mode.

This results in the heating never going above a lukewarm temperature.

Without knowing anything about boilers, plumbing or heating; could anyone on this forum please help with any thing I can do to correct this?

Many thanks for your time and I sincerely appreciate any help or guidance anyone may be able to provide!

Shane

 

[simond]

If it is a newer ecoTEC + (silver door trim, and buttons instead of knobs) there is - in my view a design fault - that causes the software to do this unless you turn down the boiler output to heating on smaller systems, or ones with restrictive pipework.

This is called range rating and you will find how to do it in the menus part of the boiler manual. It should be done by a gas tech but since it is only pressing buttons you could have a go.

So for instance, if it is set to 24Kw output heating you could turn it down to 15Kw. Vaillant help line might talk you through it, too involved to go into on here.

 

[SPMM1984]

Thanks Simind, much appreciated and very informative!

The boiler is one of the 'older' style ones with two knows, one for heating and one for HW - do you still think it could be the range rating though?

Many thanks again,

Shane

 

[simond]

What model ecoTEC is it? There are 4, 6, 8 and 9 series units out there. All different.

And is this a sudden deterioration or has it always/for a few years been the case?