Sub-Zero error code · 30 8 10
Sub-Zero Code 30 8 10: Icemaker Open Circuit
Sub-Zero code 30 8 10 means the icemaker circuit reads open. Usually lost power or broken wiring to the icemaker, or a failed icemaker module.
Sub-Zero code 30 8 10 means the control board detected an open circuit on the icemaker, so it is not seeing the expected electrical load. The fix is to check power and wiring to the icemaker and replace the icemaker module if the element or module is open.
30 8 10, explained
The board monitors the icemaker circuit and expects continuity through the module and its heater. An open reading means the path to the icemaker is broken, either in the wiring or within the module itself. With the circuit open, the icemaker cannot run a harvest cycle and ice production stops.
Severity:Service recommended
How 30 8 10 shows up
- Icemaker completely stops cycling
- Empty or never-refilled ice bin
- No harvest motor sound and no fill
- Code stored in diagnostics with no SERVICE light
- Dispenser delivers no cubes
What usually causes it
- Disconnected or corroded icemaker connector
- Broken wire in the icemaker harness
- Loss of supply power to the icemaker
- Failed icemaker module (open internal circuit)
- Plug not reseated after prior service
Which part 30 8 10 points to
- Icemaker module/assembly — Replace when power and wiring are confirmed good but the module reads open
- Icemaker harness/connector — Repair or replace when the open is in the wiring or plug
Why 30 8 10 appears
Icemaker connectors back out or corrode in the cold, humid bin area, and harness wires fatigue from repeated door movement. The module's internal heater or control can also fail open after years of thermal cycling. A disconnected plug after service is another frequent cause.
What you can safely check
- Verify the icemaker is switched on and the bin is seated
- Confirm the home water shutoff is open
- Power-cycle the unit at the breaker and watch for a cycle
- Note the code and when ice last formed
When 30 8 10 needs a technician
An open-circuit reading can be wiring, power, or the module, and isolating it requires continuity and voltage testing at the icemaker connector. A technician verifies the open before replacing the module.
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Frequently asked
Sub-Zero 30 8 10 — questions
What does Sub-Zero code 30 8 10 mean?
Code 30 8 10 is an icemaker open-circuit fault. The board monitors the icemaker circuit and expects continuity through the module and its internal heater; an open reading means that path is broken, either in the wiring or inside the module itself. With the circuit open the icemaker cannot run a harvest cycle, so ice production stops completely.
Can I troubleshoot 30 8 10 myself before booking a visit?
You can do the safe basics: verify the icemaker is switched on and the bin is properly seated, confirm the home water shutoff is open, then power-cycle the unit at the breaker and watch for a cycle. Also note when ice last formed. Beyond that, isolating an open circuit needs continuity and voltage testing at the module connector, which is a technician task.
How do I clear code 30 8 10?
Cutting power at the breaker for about a minute clears the stored 30 8 10. If the open was caused by a plug that was simply loose, reseating it and power-cycling can bring the icemaker back. But if a wire is broken or the module has failed open, the code returns on the next cycle attempt and stays until the wiring or module is repaired.
Is the refrigerator safe to run while 30 8 10 is logged?
Yes. There is no SERVICE light and the refrigerator and freezer cool normally; only the icemaker is down, so the bin empties and is never refilled and the dispenser gives no cubes. It is purely a convenience issue with no safety risk, so you can keep using the unit and schedule service when convenient.
Which part is replaced for 30 8 10 and what does it cost?
If power and wiring test good but the module reads open, the icemaker module or assembly is replaced; if the open is in the harness or a corroded connector, the wiring is repaired instead. We pin down which on a flat $89 diagnostic with continuity and voltage testing at the connector, and every repair is covered by a 365-day warranty. Call (650) 668-1554.
How is 30 8 10 different from 30 8 05, the no-fill-signal code?
Code 30 8 10 is a true open circuit, the board sees no electrical load through the icemaker at all and the harvest cycle never runs. Code 30 8 05 is different: the circuit may have continuity, but the module fails to send its fill-request signal. Because 30 8 10 indicates a broken path, the technician confirms it with a continuity test at the connector, whereas 30 8 05 calls for checking the module's signal and ground under power.
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