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Yes , system is completely built from brand new everything. Installed summer 2008. Plastic piping. Radiators are the kind that have 'flat front that stays relatively cool. Vaillant ecoTec plus 637 boiler. We have had nothing but trouble with this system since it was put in. What I want to know...

The advice is good , and I will do as suggested. But I am still curious to know if other people have this from new installations and is it a fault within the radiators or the Vaillant boiler heat exchanger. Who should be paying for the additional work of Powerflush and installing the magnetic...

Thank you, I think you must be right. I will speak to my installer when he gets back from holiday. In the meantime...is this kind of problem common in a new installation. My guy tells me he's never seen it before! Would you like to hazard a guess as to why we have this - radiators or boiler...

We installed a completely new central heating system just over a year ago. We have hardly had more than a few weeks at a time when the control valve has not clogged up with what are ferrous small metal chippings and dirt. My plumber installed a filter just before the return goes into the new...