What is the reason why the ignition electrode does not discharge and no flame is found?
(1) The ignition transformer is burnt out;
(2) The high-voltage wire is damaged or falls off;
(3) The gap between the relative dimensions of the ignition rod is too large or too small;
(4) The electrode is broken or shorted to the ground;
(5) The spacing is not appropriate;
(6) The ignition transformer is burnt out.