What do I need to do if I'm using a high-altitude brewing setup with my Keurig K-Select?
Enable High Altitude Brewing Mode by powering off your coffee maker, pressing and holding the Strong button while also pressing the Small Mug (237 ml/8 oz) button for 3 seconds until lights blink confirming mode is active. Power back on to ensure setting is applied.
From the official Keurig K Select K80 manual, page 2
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