Thermador Refrigerator Error Code 3-2-5

Error code 3-2-5 indicates a problem with the icemaker inlet water heater. This small heating element sits at the water inlet of the icemaker and prevents freezing at that point. The control board has detected that the heater circuit is not operating within acceptable parameters, so it logged the fault and may have disabled icemaker operation. Testing the heater resistance is the first step toward diagnosing the root cause.

The refrigerator and freezer compartments will generally continue to cool normally while this error is active, since the fault is limited to the icemaker inlet heater circuit. However, ice production will likely be affected or stopped entirely. You can continue using the refrigerator for food storage, but the icemaker should be serviced promptly to avoid potential water inlet issues.

Repair costs depend on whether the fix involves only a wiring repair or a full icemaker assembly replacement. Wiring connector repairs are relatively inexpensive, while icemaker assembly replacement typically ranges from a few hundred dollars to over five hundred dollars depending on the specific model, parts pricing, and labor rates in your area. Thermador refrigerators are premium appliances, so parts costs can be higher than average.

Start by disconnecting power and measuring the resistance of the inlet water heater using a multimeter. On US units the correct value is 7 kilohms, and on EU units it is 33 kilohms. If the reading is open or far outside those values, the icemaker assembly needs to be replaced. If the heater reads correctly, inspect the wiring harness and connector for damage or corrosion before replacing the icemaker.

A power reset may temporarily clear the error code from the display, but the fault will return if the underlying problem with the inlet water heater or its circuit has not been repaired. The code is a symptom of a hardware failure, not a software glitch, so resetting alone is not a fix. The heater resistance and wiring must be tested and corrected to resolve the error permanently.