Airco Furnace Piolet neutral? I took out my old tubes and cleaned them. Now when...

I took out my old tubes and cleaned them. Now when rear legs installed the piolet light is hissing but stays on. Furnace woulnt come on ... so is it the therma couple? Or
We require a hose down softner to be...
Answers:    it could be the thermocouple or the flame sensor
It never rain but it pours!!?
It could be the thermocouple but it could be a few other things. For more info including a troubleshooting guide, check out the furnace page at my source.