It’s a pressurised system. I suspect the feed flexi hose will be okay as hot water is getting in during testing bleeding and draining but the return hose is as yet untested.
Forgot to mention I’d tried turning off the other rads in testing and it stayed cold. The only time it began warming was during bleeding and draining.
I was told he was a plumber, I wasn’t impressed with the kitchen sink install that he did either.
So I’ve had a rad in the conservatory for years which the pipework is spurred from upstairs and it’s gone cold with cold pipes too for the first time. Expecting a simple fix I bled it, made sure the valves were open but no effect. So now I suspected a stuck valve (though both were kept open...