TRVs won’t grip. Guide says no adaptor needed.
Hi, installed my tado heating setup yesterday. Got extender, thermostat etc all up and working, started on the TRVs.
Old one, a pegler terrier ii came off easily enough and the new one seemed to screw on. But then I noticed that the instructions involved twisting and clicking, which of course secures the the two parts of the TRV. The value would just keep rotating around when I moved it and no click.
the underneath of the TRV that’s suppose to grip onto the metal hexagonal mount is wider than the one that comes with the radiator.
i couldn’t see how any of the adaptors provided could resolve that/
on here it says no adaptor needed. Am I doing something very obviously wrong?