Just turned on the central heating and noticed the pressure gauge is
sitting under the 0.7 bar. Opened the valve to try and raise it but it
just sticks. The downstairs radiators are hot but only the bathroom
radiator upstairs gets hot. Tried bleeding but only water comes out.

Any suggestions from anyone?

--
Alan G
"The corporate life [of society] must be
subservient to the lives of the parts instead
of the lives of the parts being subservient to
the corporate life."
(Herbert Spencer)