Don't touch the surface of the Hot Surface Ignitor with your skin. It
has been known for at least 20 years that will lead to premature
failure. If you don't know what you are doing, you would be better off
hiring a contractor to fix it for you. It would certainly be faster
and you would get a warranty as well. If you want to save LOTS of
money, turn the furnace off and leave it off. Then you won't need to
buy parts on the internet.

Not trying to be a harda--, just surprised what some people will do to
save a little money.

Stretch
(HVAC contractor in South Carolina)