OK .............
im having the same problem wit a solo 3 pfl 40 did you find a cure
I have lit the (sealed) boiler with a hob igniter. The burner ignited and the burner LED came on. I left it for a while (5 mins) and the rads started to warm up. Good! But when I turned it off and on again it did not ignite which tells me there must be a problem with the igniter / spark ??? I relit it and it went ok again. This unit should not need manual lighting, it is a sealed unit after all. How can I check the igniter or fix this?
I feel I am getting
warmer in solving this