For customers experiencing a continuously running fan on Yoga 910-13IKB and 13IKB Glass systems, please upgrade to the latest WLAN driver, v. 12.0.0.278. It can be downloaded here: http://support.lenovo.com/us/en/downloads/DS119197. If this does not change the fan behavior, try uninstalling the Qualcomm Atheros WLAN Installer, then reinstalling the driver.