upstairs downstairs

[j9123]

Hi all, after a bit of advice please!

Worcester boiler with newish pump. When heating set to come on, quite often the upstairs rads warm up fine and the bottom ones dont. After a few resets of the boiler the rads come good. Boiler has just been serviced, all parameters normal. Pump is hot and feels like it is running. We have bled the downstairs/upstairs rads countless times.

Any ideas would be marvellous, thanks

 

[Armo74]

Stop bleeding the rads and check the pressure. Bleeding when you don't need to just causes future problems.Have a read about system balancing aswell.

 

[j9123]

It is a vented system, the radiators were balanced and nothing has been disturbed. Again yhe upstairs rads have come on today but the downstairs are cold.

 

[Armo74]

Try turning the upstairs ones off and see if the downstairs ones get hot. What speed is the pump set at?

 

[maltaron]

Sounds like a pump problem, you have gravity flow to upstairs.

 

[j9123]

Thanks for the replies, when upstairs rads turned off it has no effect on the bottom rads, the pipipes going in and out of the pump are hot and pump is running, pump is set midrange, slightly above the middle 'spot'

 

[Armo74]

How many motorised valves do you have?

 

[j9123]

Just one in the airing cupboard, with 3 pipes, thanks