Hey guys, so lately my furnace has been doing some strange things, it still works okay, hold temp fine but a few times a day it sounds like a relay clicking. you can hear the furnace kick on like its going to start up, then this relay clicking noise starts up and the furnace goes on and off. I don't know a whole lot about furnaces, but fairly mechanically inclined. When I turn the heat up, the furnace starts and ignites and runs no problem. most of the day it's fine its just the odd time it does this. Any ideas?