Checked Bosch heat pump diagnosed the thermostat is burnt out and caused the fuse located in the air handler to blow replaced fuse and jumped out the thermostat and checked system operation discussed the issue with the homeowner and was told that they will order one online and replace it themselves View visual findings from this job here - https://visionshare.xoi.io/?id=XA-AB08-4D2AE538EC5F47388ABE7556B1C4D1CD