Technivorm Moccamaster Incorrect Extraction / Water Temperature or Flow Issue

Coffee tastes weak even though brew cycle completes normally

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Possible Causes

Boiler not reaching proper brewing temperature, Excessively fast water flow through brew basket, Incorrect grind size (too coarse), Misaligned outlet arm not distributing water evenly

How to Fix / Troubleshooting

Safety: Normal handling precautions; no internal live parts are accessed for basic checks.

  • Check grind and dose: Use a medium grind suitable for drip coffee and follow Moccamaster's recommended coffee-to-water ratio (typically around 60g per liter).
  • Verify outlet arm position: Ensure the 9-hole outlet arm (on many models) is correctly positioned over the center of the brew basket and not clogged. Clean the holes with a pin if needed.
  • Check brew time: A full pot should brew in about 4–6 minutes depending on model. If it is significantly faster, water may be flowing too quickly due to a stuck-open drip-stop or missing flow restrictor in the outlet arm.
  • Temperature check (advanced): Use a food thermometer to measure coffee temperature in the carafe immediately after brewing. It should be around 92–96°C (197–205°F). If much lower, the boiler thermostat may be faulty and require replacement.
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Repair Difficulty

Easy 2/5

Required Part

Outlet Arm with Flow Restrictor
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