Header Tank won't drain, upstairs radiators cold.
Posted: Sat Jan 19, 2008 8:18 pm
I recently drained our system to put new valves on the radiators and clean some sludge out of two of the downstairs radiators. I turned the radiators off upstairs emptied the radiators downstairs did the job, now can not get water into the radiators upstairs, tried bleeding them and no air comes out. Also header tank does not drain properly (drained system before with no problems), can anyone help.