Arrived at location for a no heat call homeowner replaced nest thermostat with ecobee Thermostat due to the circumstances of thermostat wiring being compromised had to trace out wiring from thermostat to air handler and air handler to condenser wired and reconfigured. The thermostats are low-voltage wiring program thermostat turn system on and checked operations left system working. View visual findings from this job here - https://visionshare.xoi.io/?id=XA-2F41-BD803C9E412A426C8CB2C0EBEAC2B04C