Gas and Oil Home Heating Furnaces - Igniter question

I have a new Goodman gas furnace (80% Efficiency) which has a Silicon Nitride Igniter on it.....which are supposed to last longer then the old style igniters.
My question is....I would like to keep one on hand just incase. I see several different brands out there and was wondering which one would be the best to purchase.
I can buy the original one that comes with the furnace or is there something "better" out there.

Thanks Charlie

I've installed a fair number of Goodmans over the years and I've never had an igniter fail. I'd keep an OEM flame rod around and an igniter if you are really worried about it.

My '96 Goodman had the first HSI (ignitor) last almost ten years. The second lasted two months and the third is on the second year. The silicon nitrides are supposed to last longer - but longer than what? Wouldn't hurt to have a backup OEM handy.

Starting with the second year of service, give the flame sensing rod a few lengthwise wipes with 0000 steel wool (super fine), at the start of each heating season. you should have smooth sailing - or heating - for years.

Thanks for the replies...it's much appreciated.

I'll feel better knowing I have an igniter and flame sensor on hand.

Thanks for the tip on keeping the flame sensor clean...I've heard that they get a build up of carbon on them after time.

Again....Thanks...Charlie

If they get carboned up, you have a big problem & need to get the furnace looked at NOW.

In 20 years of doing service work, I may have replaced 5 flame rods. As goldstar said, a few swipes with very fine steel wool or a scotch brite pad will clean them nicely. 99% of the time when a flame rod is replaced it is done so needlessly. The single biggest problem with them is the connection to ground getting rusty.