I have replaced the ceramic fuse (4A) on the PCB and the boiler started up, but made wierd noises. The it went dead. There's power on either side of the replacement fuse and the water pipe temp. sensors are in contact with the pipe. There is no obviouse sign of damage to components on the board.
What can I check before resigning myself to £100+ expense?

Please, is there any 'Corgi' boys out there who can help?

James Skinner
(01908) 630370)
07944 156 717
email: jimskinner@hotmail.co.uk

James Skinner, December 2007

put a meter across the wires on the back of the on off switch (potentiometer) they are in a pair and a set of three. try the pair first with switch in the off position set the meter to resistance (ohms 2m) and see what the reading is. it should change from 1 to 0.

jamiew, December 2007

it may be the Potentiometer

b, December 2007