How can I unblock the pipes from the bioiler to a raditer

How hard is it to source a blockage in the copper pipe there is heating up stairs but not down stairs but when turned upstairs off there is heating downstairs

Hi karrad and Welcome to The Plumbing Page. At AskMeHelpDesk.com. You're responding to a 4 year old dead thread so I gave you one of your own. Look in then upper left hand corner of the first post form the date in the first post before you post, Thanks, Tom

Hi Karrad

So the issue isn't a blockage issue as much as it is an issue diverting the heat to both floors at the same time, right?

Do the upstairs and downstairs have their own separate thermostats (zones)? Are there any other zones associated with the system... say for making hot water or perhaps a zone for the basement?

Finally, has this always been a problem or is this a new issue? If a new issue, has any work been done on the boiler lately? How about the zones... have they been bled off in the last year or two?

Please answer all questions, OK?

Mark

Hi they have the same thermostat and no work has been done and have bled all the radiators bgas has changed the pump after we found the problem and that dodnt make no diff they coming back to change the diverta valve