Safety first: Disconnect power before cleaning coils or accessing internal components.

Clean condenser: Thoroughly clean the rear or bottom condenser coil with a brush and vacuum. Improved heat rejection can significantly speed up ice production.
Check ambient temperature: Ensure the Ikea ice maker is installed in a room within the specified temperature range (typically 10–32°C). Very warm rooms slow ice production.
Verify door/bin closure: Make sure the bin door closes fully and seals, preventing warm air infiltration.
Monitor cycle: After cleaning, run a full cycle and time it. If cycles remain abnormally long and the evaporator plate does not frost evenly, the compressor may be weak or the system undercharged, requiring a refrigeration technician.
Sensor calibration: If available, run a sensor calibration or reset procedure from the service manual to correct thermistor readings.

E16 error, ice production very slow, long cycle times

Possible Causes