HOw to replace water pump?

[monstereyebrows]

Hi my radiators appear not heat up quite as much as they did ie top half hot lower half warm there is no air in the system. This morning I looked at the pump and noticed it smelt a bit like burning plastic therefore I suspect that the pump is at fault> can anyone advise?

If I need to replace pump it looks like undoing the 2 nuts and sliding in new pump in but how do you empty boiler of water please. Ie could tell me the procedure. The boiler is halstead ace high 102.

Easy language please.

Thanks

 

[corgiman]

doubt that your pump needs changing

try doing a search on "sludge" and "flushing"

 

[monstereyebrows]

Hi thanks for advise however all the rads are the same throughout the house. Would this sludge be the problem. The system has been flushed about four times in last year with fernox and sentinel.

In addition last 10 days ago I had 4 rads upgraded to doubles and past ten days worked perfect lots of lovely heat.

Then this morning the auto air vent and pressure relief valve released water and the pump smelt of burning plastic. Does it suggest that the pump did not operate causing pressure ( This was from cold). after this I restarted the boiler and the rads don't seem to heat up to temp they did before ie the top half quite hot but the lower half not as hot.

Thanks Peter