Thermador Ice Maker: not harvesting ice

Professional Repair Guide

What is this symptom?

If your Thermador ice maker is failing to harvest ice, you may notice that ice is forming but not being released into the storage bin. This issue can stem from various causes, such as insufficient water supply, incorrect freezer temperature, or a malfunctioning harvest cycle mechanism. Understanding these potential causes can help identify the right solution to restore your ice maker's functionality.

Urgency: Medium

Possible Causes

Insufficient water supply to ice maker (low pressure, clogged filter, frozen fill tube)

How to Identify: Ice maker mold not filling with water; water filter not changed for >6 months; low household water pressure; frozen fill tube observed behind freezer wall

Part: Water inlet valve / water line / water filter

Incorrect freezer temperature or faulty thermostat preventing proper freeze to harvest transition

How to Identify: Freezer temperature above recommended range; irregular temperature fluctuations

Part: Freezer thermostat / temperature sensor

Harvest cycle mechanism failure (motor, thermostat/sensor, control logic)

How to Identify: Ice cubes formed but not ejected; no movement during harvest phase; unusual clicking/grinding; possible failure in harvest thermostat or motor observed

Part: Ice maker motor, harvest thermostat or sensor, control board

Ice buildup or jam preventing ejector arm movement

How to Identify: Visible ice jam in mold or around ejector; ejector arm won’t reach home position due to obstruction

Part: Ejector mechanism

Next step

Choose the next step for not harvesting ice

Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.

Check during diagnosis

Most relevant component to inspect

Water Inlet Valve

Controls the flow of hot and cold water into the appliance.

Typical part-only price
$25 - $60
DIY difficulty
Easy
Estimated time
15-30 mins
Where can I find the model number?

Check the rating label around the door, lid, frame, rear panel, or inside the appliance cabinet. Use the complete model number, including suffixes.

Find a part that fits my model

Verify the complete model and part number on the retailer's compatibility page before ordering.

Other parts options

Check related components first; use model search as a fallback.

Possible related component

Temperature Sensor

Monitors the internal temperature to ensure correct operation and prevent overheating.

$15 - $35 · Easy · 15-30 mins

Check fit & price
Possible related component

Thermostat

Regulates temperature by turning the heating or cooling system on or off.

$15 - $40 · Easy · 15-30 mins

Check fit & price
Possible related component

Main Control Board

The central brain of the appliance that controls all components, cycles, and timings.

$120 - $280 · Medium · 20-40 mins

Check fit & price
Model number required

Model-compatible Ice Maker parts

Enter the complete model number to browse compatible replacement parts. This is a model-based parts search, not a diagnosis that a specific component failed.

Find a part that fits my model

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Preventive Maintenance

  • Replace water filter: Restricted water flow causing reduced ice production or failed harvest cycles
    Frequency: every 6 months
  • Regular defrost/ice bin cleaning: Ice jams and buildup that could block harvest cycle
    Frequency: every 3–6 months

Frequently Asked Questions

Why is my Thermador Ice Maker not harvesting ice?
Common causes include insufficient water supply, incorrect freezer temperature, or a failure in the harvest cycle mechanism.
How do I fix Thermador Ice Maker not harvesting ice myself?
No DIY solutions are available, as this issue requires professional assessment.
How much does it cost to fix not harvesting ice?
Costs can vary depending on the specific issue; consult a technician for an estimate.
When should I call a technician for not harvesting ice?
If the ice maker consistently fails to eject ice despite troubleshooting, it's time to call a technician.

References & Sources

Community Analytical Insights

Guidance from available sources; statistical claims are shown only for samples of at least 10 discussions

Common Issues Reported by Users

  • Faulty ice maker module
  • Clogged water supply line
  • Defective thermostat

User Suggested Solutions

  1. Check and replace the ice maker module. First, unplug the unit. Remove the ice maker cover, disconnect the wiring harness, and replace the module with a new one. Reassemble and plug the unit back in.

  2. Inspect the water supply line for clogs. Disconnect the water supply line from the back of the ice maker, and flush it with water to remove any blockages. Reconnect the line and check for leaks.

  3. Test and replace the thermostat if needed. Use a multimeter to check the thermostat for continuity. If it’s defective, replace it by removing the old thermostat and installing a new one.

Limited-source guidance; percentages and success-rate claims are not shown
View Sources

Data compiled from real discussions on r/appliancerepair and r/Appliances:

  1. Thermador ice maker won't drop ice

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