Problem sorted..
Ripped out most of floor boards and found a service valve. Ripped out the valve and found it was clogged with black debris.
replaced the valve and bit of pipe each side and piping hot water was flowing upstairs.
Really appreciate your comments and help here... thanks guys.
Ripped out most of floor boards and found a service valve. Ripped out the valve and found it was clogged with black debris.
replaced the valve and bit of pipe each side and piping hot water was flowing upstairs.
Really appreciate your comments and help here... thanks guys.