Amanda what happened when the engineer came round?, as this is exactly what happen to me( I have potterton profile 100e and fan runs but pilot light will not light.)
Apreciate any help as we are freezing!
steve datchet, January 2009
The sequence is as follows...
Call for Heat (Thermostat + Programmer)
Fan Runs
Pressure Switch detects fan running - tells PCB
PCB opens pilot gas valve and makes spark
Pilot lights (automatically)
PCB senses heat from pilot light and opens main gas valve
Main Burner lights...
There is a good fault-finding chart in the back of the installation & servicing instruction booklet if you still have it.
Peccavi, December 2008
it should light electronicly if it doesnt u cant light it manualy
