Malfunctioning electrodes

First, a warning!  Electrodes are there to set the fuel on fire when it is being blown into the burner chamber at high pressure.  Just the description of the function should spark (pardon the pun) some caution, if not downright fear.

If you have no experience at this go to a service center to get the work done.  If you have some experience, try these basic instructions.  There is no information here, beyond the basics.  These instructions are intended to assist the owner of the machine, not professionals.  Professionals don't need to read this. They know what to do.

Why so cautious?  First, there is fuel being spayed at high pressure which is intended to be ignited into a flame.  Second, there is a transformer which produces thousand of volts of electricity. Third, there is an electrical spark being produced by the high voltage, which fires the fuel. Fourth, there is a very intense fire burning in a restricted area.

Beyond checking if the igniters are working or positioned properly there is not much we want to tell you about.  If the igniters are in good shape (not broken, burned or cracked) and after setting the igniter position and gap, according to manufacturers specifications, there is still no spark, then the problem is generally in the transformer.  Testing a transformer requires knowledge and the right testing equipment.  Don't touch the contacts to see if there is power there!  Go see a service guy.