Okay. It's working now. I went out and turned the fridge on "gas" then I walked around the back and I could hear the sparking of the igniter. Click, click, click. Every second a strong click. Okay I've got gas, got spark. What's the problem? I took the cover off to see the back of the fridge. I could see that a spark was jumping from the white wire to a pipe, right through the insulation. The wire was touching the pipe. So I just moved the wire away from the pipe and the fridge started working! I will put some more insulation on that white wire.