bath and upstairs radiators

[wayneparker]

when i turn the water on down staires to have a bath for some reason the upstairs radiators come on aswell.This was not a problem through winter obviously but now the summer is coming i can't heat the bath water up and have the radiators on aswell anybody know an answer? thanks for your help.

[stanleyman]

It sounds as if you have a combination boiler with a faulty valve that is allowing the flow to both hot water and rads. You need to get a service engineer in to fix it.

[aggiela]

if you do not want to get an engineer just turn off the upstairs radiators. there should be valves on the side of the radiator that you can turn down.