Error Code	Symptom	Fault Type	Guide
–	Auto-off feature does not work; hotplate stays on indefinitely (models with auto-off)	Failed Auto-Off Timer Circuit	View Details
–	Brew basket does not drain when carafe is removed; coffee remains in basket	Stuck Drip-Stop Valve	View Details
–	Brew basket filter collapses or folds over during brewing	Excessive Flow or Incorrect Filter Fit	View Details
–	Brew basket overflows only when making full pot, not with smaller volumes	Flow Mismatch at High Volume	View Details
–	Brew cycle does not start when switch is turned on; only hotplate heats (on some models)	Brew Circuit Interruption / Selector Switch Fault	View Details
–	Brewing stops mid-cycle and power light turns off	Overtemperature Trip / Thermal Fuse Activation	View Details
–	Brewing stops mid-cycle but power light remains on	Intermittent Boiler Heating / Loose Connection	View Details
–	Carafe does not sit flat on hotplate; brewing stops when carafe is bumped	Misaligned Carafe or Carafe-Sensing Mechanism	View Details
–	Coffee maker does not power on at all (no lights, no heating, no noise)	Open Power Circuit / Failed Thermal Fuse	View Details
–	Coffee tastes bitter or burnt even when freshly brewed	Over-Extraction / Excessive Brew Temperature or Time	View Details
–	Coffee tastes weak even though brew cycle completes normally	Incorrect Extraction / Water Temperature or Flow Issue	View Details
–	Gurgling or sputtering noises are unusually loud during brewing	Air Entrapment / Partial Blockage in Boiler Circuit	View Details
–	Hotplate does not heat or keep coffee warm, but brewing works normally	Open Hotplate Heating Element or Failed Hotplate Thermostat	View Details
–	Hotplate overheats, causing coffee to scorch or burn quickly	Stuck Hotplate Thermostat / Incorrect Thermostat Rating	View Details
–	Indicator light does not work, but brewing and heating are normal	Failed Indicator Lamp or LED	View Details
–	On/off switch light flickers or cuts out when touched	Worn or Loose Rocker Switch Contacts	View Details
–	Power light comes on but water does not heat or brew	Open Heating Element / Failed Boiler Assembly	View Details
–	Rust-colored or metallic-tasting water from coffee maker	Corrosion in Boiler or Metal Components	View Details
–	Strong plastic or chemical smell/taste from new or recently serviced unit	Residue from Manufacturing or Replacement Parts	View Details
–	Unit continues to heat or brew after being switched off	Stuck Switch Contacts or Shorted Control Circuit	View Details
–	Unit emits a burning smell during operation (no visible smoke)	Overheating Electrical Component or Coffee Residue on Hotplate	View Details
–	Unit heats but no water flows up through the outlet arm (no dripping into carafe)	Blocked Boiling Tube / Scale Blockage in Copper Boiler	View Details
–	Unit trips household circuit breaker or GFCI when turned on	Ground Fault or Short Circuit in Heating Circuit	View Details
–	Unit vibrates or rattles noticeably during brewing	Loose Internal Components or Panel Resonance	View Details
–	Visible smoke from base or hotplate area	Severe Electrical Overheating / Component Failure	View Details
–	Water appears cloudy or has white flakes after brewing	Heavy Mineral Content / Scale Shedding	View Details
–	Water drips from outlet arm even when machine is off and cold	Siphoning / Residual Water Drainage	View Details
–	Water flows very slowly; brew time is much longer than normal	Partial Scale Restriction in Boiler Circuit	View Details
–	Water leaks from around the brew basket area onto the hotplate	Brew Basket Overflow / Drip-Stop Malfunction	View Details
–	Water leaks from the bottom of the coffee maker during or after brewing	Internal Leak in Boiler or Tubing Circuit	View Details
–	Water reservoir level does not decrease during brew cycle, but heater gets hot	Blocked Reservoir Inlet or Airlock	View Details
–	Water temperature in carafe is lukewarm, not hot, immediately after brewing	Underheating Boiler / Thermostat Out of Specification	View Details

Technivorm Moccamaster Coffee Makers Error Codes

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