Thermador Refrigerator Error Code 3-1-3

Code 3-1-3 on a Thermador refrigerator indicates a fault with the icemaker water fill valve. The refrigerator's control system has detected that this valve, which supplies water to the icemaker during each ice-making cycle, is not operating correctly. The icemaker may stop producing ice as a result. A technician should test the valve and replace it or the icemaker assembly as needed.

The refrigerator's cooling functions are generally not affected by a 3-1-3 error, so food storage remains safe. However, if the water fill valve is stuck in the open position, there is a risk of water overflowing into the icemaker or the refrigerator compartment. It is best to address the fault promptly to avoid potential water damage.

A power reset may temporarily clear the code, but if the underlying fault with the water fill valve or icemaker assembly has not been resolved, the code will return once the system runs through another icemaker cycle. Resetting is useful for confirming whether the fault is intermittent, but it is not a substitute for diagnosing and repairing the root cause.

A knowledgeable DIYer can inspect the water fill valve for visible damage, check the wiring connections for corrosion or looseness, and confirm the water supply is active and unrestricted. However, testing the solenoid coil electrically and replacing internal components requires some comfort with appliance repair and basic electrical testing. If the valve or icemaker needs replacement, those parts must be sourced and installed correctly to avoid water leaks.

Repair costs depend on whether the water fill valve or the full icemaker assembly needs replacement. A water fill valve replacement typically ranges from around $80 to $200 including the part and labor. If the icemaker assembly itself needs to be replaced, costs can range from $200 to $500 or more depending on the model and local labor rates. Getting a diagnostic inspection first helps avoid replacing parts unnecessarily.