Whenever you make any wiring changes to your thermostat (for example, adding Y2 or W2 wires), you will need to reconfigure the thermostat accordingly. Here's how to do that on the thermostat itself:
Main menu > Settings > Installation Settings > Equipment > Reconfigure Equipment
The thermostat will then ask you a few questions about your HVAC system and preferred settings. If you have any questions, please contact our support center or an HVAC technician.
If you moved homes or had a completely new HVAC system installed, the SmartRecovery algorithm will have to be reset. Please contact our support center and we'll help you with that!