Service maintenance warranty Library system located in the garage attic has a thermostat installed by Vivint that is not functioning correctly and/or installed properly for DUAL FUEL operation. The thermostat is not energizing gas heat through the isolation relay at the furnace. The black wire was removed from the original thermostat but not installed on the new thermostat. ( E heat?) Outdoor temperature heat pump lock out and change over temperatures are unknown This thermostat does not appear to be able to control emergency heat separate from heat pump or AUX Homeowners must contact Vivint or choose a dual fuel compatible thermostat for Westin Air to install