Potterton Netaheat Profile does not light?

When I switch the boiler on, the pilot light comes on but althought I can hear a couple of clicks, the main bit of the boiler does not light. Any ideas?
Andy Davies, January 2005


done
Any idea how much this is likely to cost?

Andy Davies, January 2005
SOLINOID DEFECTIVE /GAS VALVE

STEVE B&H, January 2005
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