An error code 74 indicates a BLE (Bluetooth) communication issue. This error code only appears in the error history when communication with the BLE module is not possible. Since there’s a communication problem between the unit and the BLE circuit board, please ensure that the BLE circuit board and its connecting cord are securely attached from the unit all the way to the BLE circuit board itself.
For further technical assistance call 866-766-7489 or use our Contractor Locator to find a local service representative.