Trying for hours to light pilot. It lights and then I keep the button pressed for 15 secs as in the instructions. However each time I release the button the pilot goes out again. Can anyone help?

JT, October 2008

I've the same problem on my Solo 2 50 RS, called a "gas fitter" in 10 weeks ago, first he changed the thermocouple (universal one did not fit), then he changed gas valve and it worked. This week same problem has occured. Called fitter back but he's at the limit of his capability and doesn't return my calls.
Naked flame placed under the thermocouple will fire the boiler up.

JRF, October 2008

Loose thermocouple
Thermocouple us
Gas valve

ivor, October 2008