Abstract: High-altitude protection logic for brewing devices is provided. An actual temperature of a liquid during a heating process is compared to a high-altitude temperature programmed into a controller. If the actual temperature rises to the high-altitude temperature before a default target temperature of the heating process, then one or more time periods may begin to run. If the actual temperature has not changed or the default target temperature has not been reached after a time period elapses, the high-altitude protection logic terminates the heating process. A maximum value of the actual temperature measured during the heating process may replace the programmed default target temperature for subsequent brewings. The new default target temperature may be used to inform and modify a target keep warm temperature for subsequent keep warm mode uses. These stored may be reset to initial program values if the device is disconnected from its power source.