Radiators not reaching flow temperature

[TonyT]

The photos don’t open for me.just the video.

[Helene]

A bit of an update - the boss of the company who sold us the ASHP came around (after bad reviews I left) and agreed that our loft K3 shouldn't have been installed off the 15mm pipe from the room underneath (my office, which is cold). It prevents both rooms from getting a decent flow. So they will reinstall the K3 off another part of the house with 22mm, and help balance the system too.

 

I'll give an update once it's done. 

 

Thanks everyone for your inputs so far.