Ice maker not cooling sufficiently, ice production very slow, compartment temperature too high

Safety: Unplug the ice maker before removing interior panels. Use insulated tools.

Steps to check air circulation:

• Listen for fan: With the door closed and unit powered, you should hear a small fan running inside. If silent, suspect the evaporator fan motor.
• Check for frost buildup: Remove the ice bin and interior rear panel to inspect the evaporator coil. Heavy solid ice covering the coil indicates a defrost or airflow problem.
• Defrost the unit: Turn the unit off, leave the door open, and place towels to catch water. Allow all ice to melt completely (this may take several hours). Do not chip ice with sharp tools to avoid damaging the evaporator.
• Test fan motor: After defrosting, spin the fan blade by hand; it should move freely. If stiff or noisy, replace the Siemens evaporator fan motor assembly. Check the fan connector for corrosion or loose pins.
• Check thermistor: Locate the evaporator temperature sensor (thermistor) clipped to the evaporator tubing. Inspect for broken wires. A faulty thermistor can prevent proper fan and compressor control; replace if out of specification.

If problem returns quickly: A deeper defrost system or sealed system fault may exist and should be diagnosed by a Siemens service technician.