Vokera Mynute boiler not firing ???

My vokers Mynute boiler is not firing, when i turn it on the green light flashes for a few seconds and then turns red. After numerous times re-setting it it will eventually fire.

I checked the connections on the PCB as was told this was more then likely the problem but all ok. From reading other boards i here it may also be Transducer. Dont want to fork out big money on PCB if its not the problem. ANyone any ideas ???????