I have a Snyder General furnace manufactured in 1989. About every other year I have to replace the hot surface ignitor.
This time it's not working. The old HSI was cracked, yet the new one is not functioning either.
The heater used to make a distinct 'click' sound as it started sending power to the HSI. The HSI would begin to glow red-hot, and after a few seconds, gas would flow to light the furnace.
Now, I don't hear that initial 'click', and the new HSI is not getting hot. It seems to be skipping the step of heating up the HSI. I've tested the current on the leads for the HSI, and it is not getting any electricity.