We just got a new furnace installed which is a 2-stage, unlike the old single stage we had. On the page at http://customer.comcast.com/help-and-support/home-control/thermostat-help it says "From the factory, the thermostat comes configured to work with single stage Cool/Heat, Single Speed Fan systems. If your HVAC system is different, refer to the programming section to configure the thermostat for your system."
Ok, so below is the programming section which only talks about setting it up for a heat pump, or switching between gas and oil, but nothing about how to set it up for a 2-stage furnace. I can get it into program mode fine, but it's completely not obvious what I have to do after that. Support on the phone was completely clueless.
Does anybody know how to do this?