eurocal boiler oil, radiators constantley on when no heating on. ?

you need to replace non return valve on primary seal ch.
this value is most probily stuck open with crap. heat from the boiler and gravity are causeing ch to circulate.
if eurocal oil combi value located on 22mm pipe behind ands inbetween expansion vessel and pump.

elvis pressley
December 2010

Mary, how large is your house and how long has this problem existed.The reason I ask is if you have owned it for a short time and if it is a large house you may have zone valves and upstairs thermostat as well as down stairs which has been a building regulation requirement for properties over 150sq metres.There must be something calling for you boiler to run and zone v/v control could be the answer otherwise all your rads would be warm. The other reason is circulation from your primary supply to your Hot water tank if fitted causing the gravitational water to flow to upstairs rads again this could relate to a diverter valve or non return valve depends on how well the installation was in the first place. Could need on-site fault finding to solve the issue.

Guytawe
June 2010