glow worm 30hx

I have inherited a house with a Flexicom 30hx boiler (heat only). With a cold house and plenty of demand, it operates rather strangely, where it will run at full tilt for 30 seconds or so (up to ~80c flow) but then you can hear it stop, and it cools down for a long while, before then having a...

Installation of Nest seems to have led to the destruction of my heating system. - Plumbers did some interesting wiring, connecting the power wires of the Nest thermostat to anything but T1 and T2 in the Heatlink, resulting in Nest H72 error. - Got plumbers back and they wired the thermostat into...