thermostat reads 67 Even when set to 70 can change programing & setings but house alway stays at 67 i get heat as night sets in but can not get system to bring the house up any warmer is this likely a thermostat problem and i need to pick up a new programable thermostat. otherwise furnace & air are working fine. where in the kettering ohio can i get a white-Rogers thermostat thanks; john