Is the solo 3 powerflued or does it have a permanent pilot.If its permanent,firstly make sure if youve had snow that the flue outside is clear of snow as the boiler will just baffle out.Pull the bottom flap off,twist the gasvalve knob to the spark sign,push in and press the ignitor 4 or 5 times.It should light.Hold the button in for 20 secs let go and it should stay lit.Then twist it around to the mainflame sign.That should do it.If its power flued again check for snow in the flue,then see if you can hear the fan running.Check it hasnt kicked off on the overheat which is on the front of this boiler,just push the button in and see if it clicks.Hopefully that should do it.
Tony S, February 2009