I replaced my furnace in December of 2005 (at the considerable cost of $5,000). Last night, the kids were complaining that they were cold and accused me of being cheap with the heat. I told them it was set to 72 and to stop whining. However, upon inspection of the thermostat, we realized it was only 64 in the house. Turns out the furnace was NOT turning on. I'm now stuck in the house and I'm freezing.