I have almost the same problem. Took the cover off and at first thought that the low water pressure switch had gone. Turned out it was the movement through the wiring loom, (connected to the thermistor), that was causing the problem. You may find that when you look at the Ignition control PCB there is one connector that seems feeds three components - one of which is that darned thermistor that's more fragile than Jade Goodys reputation right now. i am trying to find out who makes them as the one Ravenheat uses is really low quality.
Dwight Gumbs, January 2007
