I have had this furnace for the second winter. It is hooked up to a basic Honeywell thermostat, not sure if a two-stage one. I have noticed this winter that the thermostat makes the clicking noise and the "Heat On" shows up on the thermostat, but there is a delay, sometimes a considerable one, before anything happens on the furnace (I'm not talking about the jump to the second stage, I mean before anything even turns on). Sometimes it gets colder than it seems it "should". I can override this by turning the power to the furnace off. After turning on the furnace power again, I immediately get all the heat needed.
I will likely call my HVAC guy soon, but could anyone here tell me if something is really definitely wrong, or is the furnace maybe just trying to run efficiently somehow? Thanks much!