Rads Not Getting Hot

[electrospark]

Hi
Just moved into new house and tested the rads but they are not getting hot.
The boiler pressure was at zero so i have re pressurised the system. The rad right next to the boiler is hot but none of the others are. I have bled the air from the rads too.
I have been under the floor and found that the flow is hot upto about 2 meters from the boiler and then goes cold.
So how do I get the system to flow correctly?
Also a lot of the TRV's were stuck in but think I have released them now as the pins spring back out.
Thanks in advance

 

[kevplumb]

check the pump first

 

[electrospark]

check the pump first

Sounds like its running. How can I check it properly???

 

[penfold46]

Hi
Just moved into new house and tested the rads but they are not getting hot.

Who's house is it? Im confused
www.diynot.com/forums/viewtopic.php?t=237449

 

[kevplumb]

View media item 17592
undo the bleed screw hold a cloth underneath

you can spin the shaft with a narrow screwdriver

 

[electrospark]

Hi
Just moved into new house and tested the rads but they are not getting hot.

Who's house is it? Im confused
www.diynot.com/forums/viewtopic.php?t=237449[/QUOTE]

Its my brothers actually its just easier to say that otherwise half the post will be a load of unnecessary writing for my slow fingures. lol

 

[bengasman]

check the pump first

Sounds like its running. How can I check it properly???

See FAQ

 

[electrospark]

View media item 17592
undo the bleed screw hold a cloth underneath

you can spin the shaft with a narrow screwdriver

do I remove the bleed screw completly to access the shaft?
If the pump is faulty i presume the shaft won't spin?

 

[electrospark]

Ok I removed the bleed screw and switched the boiler back on. The shaft is spinning and water dripped out.

Whats my next step? Thanks

Help help.....

 

[penfold46]

With the centre screw removed (on the pump) can you stop the impellor spinning with your finger. Careful as the water may be hot.

 

[electrospark]

With the centre screw removed (on the pump) can you stop the impellor spinning with your finger. Careful as the water may be hot.

and what does this achive? Thanks

 

[kevplumb]

is there an auto air vent near the pump View media item 11231

what make / model boiler

 

[electrospark]

is there an auto air vent near the pump View media item 11231

what make / model boiler

Yes there is looks a bit crusty. Its a Vokera Linea

 

[penfold46]

and what does this achive? Thanks

Just becuase the impellor is spinning does not neccessarily mean the pump is working.

 

[electrospark]

and what does this achive? Thanks

Just becuase the impellor is spinning does not neccessarily mean the pump is working.

Ok so how do you fully check if its working? Is there anything else I can try before removing the pump?