RichardS

Was responding to "Temp's" message that 45-55 would be about right? The control marked on my original photo. https://photos.app.goo.gl/LLV8GRAFUkN3A1379

Bingo. All working well. Thermostat set to 50C. Thanks again to everybody.

A little tap and the pump seems to be humming ever so slightly whereas it seemed very still before. I also noticed that the HeatMiser controllers both needed recalibrating - when I bought in another thermometer I realised they seemed to be overstating the room temperature by 2-3 degrees. Have now reset them. I think it may be sorted, but if not will report back in the morning. Thanks so much to everyone who chipped in... Richard

Thanks @dpmiller Electrics: I know one end of an AA battery from the other, that's about it. Should the pump be making any noise? It seems completely silent. Richard

Hi - thanks all of you for further replies, particularly on Boxing Day. It's an oil boiler, and the upstairs rooms and a couple of the downstairs rooms have conventional radiators. They're working fine, and we have hot water, etc. So all working except for these three areas which have the underfloor heating. As for where the pipes are hot, please see latest photo - red lines = very hot to the touch, blue line = no obvious heat. https://photos.app.goo.gl/uoMPRRhNNvVZfBeDA Richard

The pump seems unresponsive even if I try changing the switch to another setting - no sign of life at all. Adjusting the temperature controller doesn't make any obvious difference - there is an audible click as you move it up and down as it finds the room temperature, but nothing kicks into action. So I'm guessing I probably need a new pump? Better photo of pump and temp controller Thanks again, Richard

Thanks so much for replying... the pump doesn't seem to be doing anything at all. Will fiddle some more and report back.

Hello - just moved into new house and struggling to make sense of an underfloor heating system. Excuse the really basic questions. We've tinkered with the controllers (HeatMiser Slimline RF) and we think we should have heating on. The displays are active and showing the room temperatures and the little flame icon is appearing. But... the floor remains chilly. There are three zones - living area, kitchen, and a utility room. The plumbing set up is in the below photo, with my rather clueless questions / observations added. Could somebody advise me on what I should be looking for / changing before I call in an expert? https://photos.app.goo.gl/LLV8GRAFUkN3A1379 Many thanks Richard