Recent content by 5imon

thanks for the tips hugh i take it that you follow standard procedure for bleeding the pump? ie turn CH and HW fully off, turn pump off then bleed?? agreed it's prob some crud caught in the pump. is there any way to check this without removing the pump entirely?

ok - I plucked up the courage to adjust the speed. The noise dropped in frequency, so I've confirmed that the CH pump is the issue. It kind of sounds like the pump blades scraping against the interior wall of the pump...as I said, not particularly a worrying noise, just annoying. any...

Hi everyone. Plumbing newbie here, wondering why my grundfos 15-60 has recently started buzzing. I recently turned up the temp on the boiler and about a week after this the pump started making a noise similar to a fridge. It doesn't sound knackered, it just sounds noisier than it should be...