Pwermax problem

Hi Mike, i attended a Powermax 140 sealed system today with no heating / hot water, took casing off & no overlimit stats had locked out. The fan is running i'm getting the 3 clicks for ignition but can't hear a spark from electrode. So i removed the electrode called for heat & there was sparking straight away, so i'm guessing it's a new HT lead. Now when i tried to put the spade connector back onto the relay / stat at the board end it just would not go back on, so i had to remove the relay / stat to see what the problem was, turns out the spade connector on the relay was damaged so bad it just would not go back on.
So i've ordered a new HT lead and the new relay / stat ( which is now 2 different part nimbers to the original) both should arrive Monday 3ed March so i'm hoping it was faulty electrode lead ?
Any suggestions most welcome. Thank you
PS this is in Edinburgh so a reasonably soft water area