Noisy pump in loft

[jermaine]

There is a very annoying humming noise coming from the pump which is connected to the water tank in my loft when I turn the boiler on. I Tried turning down the pressure on the pump, but this makes no difference...ITS DRIVING ME CRAZY BECAUSE IT'S CONSTANT..AARRRRGGG....HELP


ALSO MY HEATERS DOESN'T SEEM TO BE VERY HOT, THEY FEEL WARM BUT NOT VERY HOT SO MY HOUSE IS FREEZING, I TRIED BLEEDING THE RADIATORS BUT IT MAKES NO DIFFERENCE....ANY IDEAS?

 

[WDIK]

It sounds like your pump has seized

 

[sotal]

My pump makes loads of noise when there is air in the system, bleeding the rads does nothing and the rads don't get warm.

All I had to do was bleed the pump - not sure if they are all the same but mine just had a big wheel on the front which you turn by hand with the pump running, it then dribbled out the noise changes then it hisses a bit of steam out, then starts again - after 5 or 6 hisses it stops - the pump is then much quieter and the rads all heat up instantly

 

[WDIK]

not really adressing the Original Posters query, however the faq is useful

//www.diynot.com/forums/viewtopic.php?t=37170

check No9, as described pump can be bled via the large silver screw in the centre of the pump.

also you can tell if the pump is running or not by shining a light in the hole.
if its stopped, TURN POWER OFF and insert screw driver into the slot and turn to free if possible.