Broken Glow Worm Ultimate 40FF Boiler!

The boiler was "hunting" so I decided to take a video so others can see what the problem is. The fix was a new PCB. This boiler has two models of PCB so you must ensure you check which your model is (either a single fuse PCB or dual fuse PCB). The dual fuse board is a bit more expensive (mine was the dual one, typical). This problem can also be down to the Air Pressure Switch but there is a simple test you can do to check thats not the case. It involves disconnecting the red and white hoses from the fan in the top of the boiler (not from the circuit box shown in the video) and blowing/sucking on the hoses (if you are unsure, don't do it).











