Gedq

looks to have done the trick. I also remember keeping a deep fat fryer in that cupboard (3 or more years ago). Perhaps the gunk was from that. I think I’ll call in the professionals to give it a good servicing.

Ok. I’ll be cautious. But I think the “airlock” recommendation has worked 👏👏👏. I didn’t know this could be bled. Plenty air came out and the pipes warmed up immediately. Just waiting on the return pipes feeling warm (and the other tell tale sign of my floor creaking). thanks so much.

Ok I’ll try that- do they just pull off? (The plastic cover) The flow meters look very dirty.

Yes there’s vibration and a light. The metal at the top of the red pipes is hot to touch but the red pipes are cold. It’s as if it’s not travelling down the pipes

I've cleaned it off with wonder wipes. I’ll see if comes back. But I’m sure it’s stopped pumping 🤷‍♀️

It’s heated by a combi boiler. What is Glycol? edit: the pump is in a utility room cupboard that’s rarely used. Would the leak indicate the pump is a gonner?

So I wasn’t sure that UFH (wet) needed maintenance. When it was fitted I was told it’s a closed system and needs very little maintenance. It’s stopped working (5yrs in). Seems to be the pump as hot water flows to the manifold and stops there. The pump (Grundfos upm3) has sticky glue like substance sitting at the bottom of it. I’ve tried “unsticking” the pump by using a screwdriver in the centre but nothing. The leaking goo tells me it may well be gubbed (the lights still come on on it) so I’m thinking of changing it. is there anything else I should be doing? Where are the isolation points (on the picture below) and what are the better pumps on the market. thanks in advance

Just saying hello. Small time DIY’r. Property renovations and good at ripping out, no so good at putting it all back together but happy to try. I’ve built up some knowledge around electrical and plumbing but can’t cut wood in a straight line so avoid carpentry at all costs. Will post a specific question in relevant forum right now 👍