What would be the main cause of having to replace the ignitor on my furnace three times in the last four months?

Answer

I would guess that you either have the improper part or improper voltage coming from the board. Different ignitors require different voltages...usually 80 or 120V and if the part is right but the voltage is not, then that could cause it. Otherwise, if you touch the surface of the ignitor where it glows, that could be ruining your new ignitors too. The oils from our skin can cause the HSI to burn out.

Updated on January 8, 2018

Original Article:

How to Figure Out What is Wrong With Your Furnace
By Dan Robbins
working