Returned to perform thermostat repair and replacement. Performed repair of thermostat cycled unit on thermostat properly communicating to furnace. through thermostat start up process found static running high. Cycled furnace through low medium and high stages for five minutes each furnace successfully started up without fault and ran for five minutes without fall through each stage. Unit successfully cycled off cycled heat pump through thermostat to ensure properly staging. Customer couldn’t find Wi-Fi password will connect thermostat himself.