Sub-Zero error code · 30 8 30
Sub-Zero Code 30 8 30: Water Detected With Icemaker Water Valve Closed
Sub-Zero code 30 8 30 means water flowed to the icemaker while the fill valve was commanded off, usually a leaking water inlet valve that needs replacement.
Sub-Zero code 30 8 30 means the control commanded the icemaker water valve closed but the system still observed water passing through, indicating a leaking or stuck-open water inlet valve. The fix is almost always to replace the icemaker water inlet valve.
What 30 8 30 means
The control board monitors fill activity and detected water moving to the icemaker even though it never energized the fill valve. This points to a valve solenoid that is not sealing, allowing water to seep or run past it. Left unaddressed it can cause icemaker overfilling, ice bridging, and water leaks inside the cabinet.
Severity:Service recommended · Service light:Flash w/Chime
Why 30 8 30 happens
Inlet valve diaphragms wear, and grit, scale, or mineral deposits from the water supply lodge on the seat and hold the valve cracked open. High household water pressure accelerates this seepage. A solenoid that fails partially open or debris under the diaphragm produces continuous flow with no command from the board.
Common causes
- Icemaker water inlet valve leaking or stuck partially open
- Debris or mineral scale on the valve seat preventing a full seal
- Excessive household water pressure forcing flow past the diaphragm
- Failed or weakened valve solenoid/diaphragm
What you'll typically see
- SERVICE light flashing with a chime
- Ice cubes that are oversized, hollow, or frozen together in a block
- Water pooling in the icemaker bin or freezer floor
- Icemaker overfilling or ice tray overflowing
- Audible trickle of water when the icemaker should be idle
Parts involved in 30 8 30
- Icemaker water inlet valve — Primary repair when water passes with the valve commanded off
- Inlet water line strainer/screen — Inspect and clear if debris is fouling the valve seat
What you can check yourself
- Note the exact code and whether you see water pooling
- Confirm the household water shutoff to the unit is fully open and the supply line is not kinked
- Check for visible water in the ice bin or on the freezer floor
- If water is actively running, shut off the supply valve to the refrigerator and call for service
When to book a pro
Confirming the valve is leaking versus a flow-sensing fault and replacing the inlet valve requires disassembly of the water plumbing and electrical verification a technician should perform.
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Frequently asked
30 8 30 FAQ
What does Sub-Zero code 30 8 30 mean?
Code 30 8 30 means the control commanded the icemaker water valve closed, yet it still detected water passing through to the icemaker. That points to an icemaker water inlet valve that is not sealing, leaking or stuck partially open, so water seeps past the solenoid with no fill command. The flashing service light and chime accompany this code.
What should I do as an owner the moment I see 30 8 30?
Because this code involves uncommanded water flow, the most important owner step is leak control: check for water pooling in the ice bin or on the freezer floor, and if water is actively running, shut off the household supply valve to the refrigerator and call for service. Also confirm the supply line is not kinked. This is the one ice-related code where shutting the water off promptly protects your cabinet and floor.
How do I clear code 30 8 30 and stop the chime?
A breaker power-cycle silences the chime and clears the flashing light temporarily, but it does not stop a leaking valve. Because the inlet valve is physically passing water past a worn diaphragm or fouled seat, 30 8 30 returns as soon as the board senses flow again. It clears for good only after the leaking icemaker water inlet valve is replaced.
How urgent is 30 8 30, can I keep using the refrigerator?
Treat this as more urgent than other ice codes because it involves water escaping where it should not. Continued seepage causes overfilling, ice frozen together in a block, and pooling water that can damage the freezer floor and cabinet. The refrigerator still cools, but if you see active water, shut the supply off and schedule service promptly rather than waiting.
Which part fixes 30 8 30 and what will it cost?
The primary repair is replacing the icemaker water inlet valve, since that is the component passing water with the valve commanded off; the technician also inspects and clears the inlet line strainer if mineral scale or grit is fouling the seat. We diagnose for a flat $89, verify the valve is leaking versus a flow-sensing fault, and back the repair with a 365-day warranty. Call (650) 668-1554.
How is 30 8 30 different from the other 30-8 ice codes?
Most 30-8 codes (like 30 8 00 and 30 8 10) are open-circuit faults, something is not getting power or has lost continuity. Code 30 8 30 is the opposite problem: water is flowing when it should be off, caused by a valve that will not seal rather than a broken circuit. That is why the fix is plumbing-side (replacing the inlet valve) and why this code raises a leak concern the open-circuit codes do not.
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