Problem solved!! Eventually.
As it didn't seem to be a straightforward problem, I signed up for a "we'll fix it for £168 or you won't pay a penny" deal off t'internet.
Glad I did - 16 days of hassle, seven visits, four different engineers, one new spark electrode, one HT lead and...
Good evening experts.
Whilst I'm not considering touching the boiler myself, I would like to be clued up enough to spot a "less knowledgable" plumber when I try to find a good one in my area, so any pointers would be much appreciated.
My five year old Range Powermax 185 keeps switching...