How can I fix my vaillant ecoTEC PLUS 837?

flashing radiator symbol

Dean
October 2015

Thanks for this info - we also now have hot water!

Nice hot shower
September 2013

Getting luke warm water, and heating has stopped working. checked panel, I have a flashing radiator sign. When I pressed i, the code is S.8.

Can anyone help?

Kadeem
April 2010

Tony...you are a living legend...we now have hot water and heating!

Thanks to your two knob advice the world (or at least my house) is a warmer place!

: D

Doc
April 2010

put both hands under the boiler and you will locate two switches facing downwards .turn the one in your right hand as far as it goes 90 degrees and then slowly open the one in your left hand.you will hear water running and the pressure arrow moving up.when it is about half way up the grey zone and before it goes into the red close left one up and then return right one to itsoriginal position.hopefully you will then be ok for hot water and heat

tony
February 2010