u/Nikmac3131

I have a Lennox G50UH(x) series gas heater that won't light. I changed the filter last night and had to take the door off to get the old filter out. while I had it open, I lightly vacuumed the inside of the cabinet. The cat frequently hangs out in the furnace room and it gets dusty and collects little cat hairs. After I put it back together, the furnace wouldn't light. The blower works, but no heat. I took a look at it a few minutes ago and noticed a small wire that I'm pretty sure needs to be re attached. I just want confirmation before I start messing with any of the wires inside the furnace. It's a very small white wire that I've circled in the picture. any help appreciated