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Hi Everyone I had a Vaillant eocTEC plus 837 installed about 5 years ago. It is operated by a Drayton Digistat SCR receiver and programmable Thermostat which used to work fine. Cleaned CH circuit last year and it worked fine through winter. Just installed a new bathroom and had to take of rad...

First off. A big thankyou to all of you who post here for your time and expert advice. I have successfully dismantled my system, cleaned every radiator, installed deaerator on flow and dirt separator on return added new radiators. Well done to all of you that have posted through the years as I...

Hi everyone Having decided on how to clean my central heating system (Vaillant eocTEC plus 837 boiler) I have now turned my attention to the type of filter I am going to attach. I know that this has been thrashed out a fair amount here and so would like you opinion on the SpiroCombi which...

Thanks very much for your help gents.

Thanks for your reply Lightning. Would it be sufficient then just to do the cold radiators then?

I have a Vaillant eocTEC plus 837 boiler installed about 4 years ago; at the time the system was powerflushed but it was installed on a very old radiator circuit. I noticed last year when bleeding the radiators that they were bleeding black/red water and that some of the radiators had cold spots...