Replaced a thermostat at $1200, didn't work. Replaced it with another, didn't work, Replaced the motherboard, $1,048, thermostat still didn't work. Called Bryant and called me, I turned off the sensor on the thermosat, it worked. YTech will not return my $1,048 for the unnessary mother board. This took 5 months. User's recommendation: Don't use YTech for your Bryant Furnace.