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Quick answer
For a Thermador ice maker that is overflowing, stop dispensing or harvesting ice, check for a jammed or stuck ice-maker arm and an overfilled bin from the outside, and use the exact model manual for the ice-maker controls. Do not force the mechanism or use sharp tools; persistent overflow needs qualified service.

Work through in order
Diagnostic checks
Use only checks that match the exact appliance or system and its official guide.
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Check 1
Stop the ice maker and observe the bin and shutoff arm from outside; do not put hands into a moving mechanism.
Expected result: Ice is packed around the arm, the arm cannot move, the bin is overfilled, or water continues entering with no harvest.
Next step: If the arm is blocked by loose ice, follow the manual and use only a blunt plastic tool. Stop for persistent water entry or damage.
Why this matters
Why: A packed bin or blocked arm can prevent the ice maker from sensing level; continued water entry after the bin and arm are clear needs service diagnosis.
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Check 2
Remove the ice bin only as the model manual shows and check that it is fully seated, without forcing it or leaving an ice shovel inside.
Expected result: The bin is mis-seated, an object blocks the arm, or the bin and arm are clear.
Next step: Re-seat the bin or remove only an accessible obstruction. Arrange service if the mechanism is damaged or cannot move normally.
Why this matters
Why: Thermador identifies ice-bin placement and obstructions as relevant to ice-maker operation.
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Check 3
Check whether the ice maker is enabled and whether the water filter is installed correctly, using the model manual for controls and filter procedure.
Expected result: The maker is off, the filter is blocked or mis-installed, or settings and filter are correct.
Next step: Correct only the documented setting or filter installation. Do not modify the inlet valve or water line.
Why this matters
Why: An off maker or restricted water path can change fill behavior; the exact model determines controls and filter fit.
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Check 4
Inspect the accessible water line and floor area for a kink, loose connection, or active leak; do not remove panels.
Expected result: The line is kinked or leaking, or no external water issue is visible while overflow continues.
Next step: Shut off the water supply if safe for an active leak and arrange qualified service.
Why this matters
Why: An external water-path problem can cause abnormal filling, while no visible issue with continued overflow needs service.
Use your observations
Decision map
Find the observation that best matches what you see, then follow the next safe action.
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PATH 01Next step
What you see
Ice or a foreign object blocks the arm and overflow stops when cleared
Do this next
Restore the documented bin and arm position and monitor one cycle.
Why this path and its safety boundary
Why it matters: A level-sensing obstruction is more likely than a confirmed component failure.
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PATH 02Next step
What you see
The bin and arm are clear but water continues entering
Do this next
Stop the ice maker and arrange qualified service.
Why this path and its safety boundary
Why it matters: The fill or level-control fault is unresolved by safe external checks.
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PATH 03Next step
What you see
Water is leaking outside the unit or the mechanism is damaged
Do this next
Shut off water if safe, leave the maker off, and call a qualified technician.
Why this path and its safety boundary
Why it matters: Continuing operation risks water damage or injury.
Helpful context
Understand the symptom
Separate an overfilled or jammed bin from a water-inlet or level-control fault by observing the ice level, the arm position, and whether water continues entering when no cycle is expected.
When checks do not resolve it
Need a professional?
Stop troubleshooting and arrange qualified Thermador service if the Thermador ice maker remains overflowing after the safe external checks, if a control is damaged, or if a breaker trips again. Do not remove covers or work on energized, gas, sealed, or refrigerant components.
Common questions
FAQ
Can I keep using the Thermador ice maker while it is overflowing?
Stop troubleshooting and arrange qualified Thermador service if the Thermador ice maker remains overflowing after the safe external checks, if a control is damaged, or if a breaker trips again. Do not remove covers or work on energized, gas, sealed, or refrigerant components.
Read the exact guide
Official sources
- Refrigerator Troubleshooting | Problems & Solutions | ThermadorThermador · Thermador refrigerator and refrigeration troubleshooting, water and ice maker checks, odor, power, temperature, and service guidance
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