Tearing hair out worc 24i junior lpg help needed :)

[TFGplumbing]

Problem: No CH or HW
Symptoms: boiler will not go through ignition sequence, when the boiler gets a demand from either ch or hw the nothing happens. if you go to reset the boiler the fan starts up on high speed for about 2 seconds and then nothing. The blue light on the front of the boiler is solid and its not locking out or giving any fault codes.


Worcester tech said its the pcb changed that still no joy they also suggested the transformer I'am going to try that today.

Tests worc tech told me to do:
I've tested the voltage to the fan which is ok
I've tested the resistance between the two wires on the flow switch which also ok
I've tested the resistance betweenthe two thermistor wires they were also ok


Any other bright ideas guys? this is really breaking my balls now lol


PS I am tearing my hair out. Also see my earlier post of how this all started




http://www.ukplumbersforums.co.uk/g...worc-24i-junior-lpg-fault-intresting-one.html

 

[P J F PLUMBING]

Da da da da da da da da da da owww owww aah ah ah ah ah

 

[TFGplumbing]

Iam sure this job is ruddy cursed!!!!!!!!!!! got the bloody thing working after changing the wiring harness and control stat and the sensors on my analyzer decide to pack up >.<, so i cant test the c02 % and make sure its burning properly!!! GRRRRRRR luckily i can borrow an analyzer from my mate tomorrow!