The radiator Q again!

[Davies365]

Good evening,
We have just moved into a new house and the living room raditor never gets warm. The other two downstairs get luke warm but not hot while the upstairs get hot. I have been around the house and bleed all the rads, the ones downstairs hiss when water is coming out.

The feed pipe to the rads is hot.

All the rads are doubles.
All have a thermostatic valve.
The bolier is downstairs in the kitchen
The clinder tank is upstairs.
Its a standard central heating system not a combi.

Any ideas please?

Thanks for any help.

 

[gas4you]

Check the pump is working correctly first of all.

 

[bengasman]

look up previous rad questions, you are bound to find your answer without having to wait for responses

 

[Davies365]

I have unscrewed the piece on the front of the pump and the shaft is spinning.

 

[gas4you]

Turn off hot water circuit, turn off all rads except one that doesn't work. Put pump on full speed and close any by-pass valve and hope