My thermostat keeps coming on ever 2 minutes after it goes off. I am in Texas where we have all four seasons in one week. I keep my thermostat at 68 and the sucker keeps coming on just after it has shut off. I do have a programmable thermostat and it is in the largest room of the house, which is an open area to the kitchen, living room, and dining room. I think its location may also play a factor because it receives the air flow of two of the vents so the temperature will rise pretty quickly when it comes on.
I think I am also not giving the furnace a chance to stabalize the room temperature. Another thing that I am going to check is the attic insulation and checking the ducts for any possible leaks.