Why altitude and hard water matter for Miele coffee machines
Littleton sits around 5,350 feet, and water boils cooler at altitude. Miele's thermoblock heats fast, but the lower boiling point means brew temperature and pump timing sit closer to the edge, so a slightly scaled valve shows up as a lukewarm or under-extracted shot sooner than it would at sea level.
Our dry Front Range climate and mineral-heavy water also drive scale buildup and dry out the brew-unit seals faster. If your descale reminders come up more often than the manual suggests, that is normal here. We clean the flow path, replace worn seals with OEM-quality parts, and set the machine's water-hardness setting to match Littleton's supply so future descaling is properly timed.