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Whirlpool Refrigerator Error Code 18 C

Reviewed by the ApplianceErrors Editorial Team · Verified against manufacturer service documentation · Last verified: June 11, 2026
✓ Low Severity 🔧🔧 Moderate DIY

Ice maker fault — ice maker not cycling correctly

The most common cause of the 18 C error on a Whirlpool refrigerator is ice maker assembly failure (~40% of cases); start with: clear jammed ice.

💰 DIY cost: $0–$180 👨‍🔧 Pro cost: $150–$320 Save $150+ by doing it yourself
Whirlpool Refrigerator error code 18 C on the display panel
How the 18 C code appears on a Whirlpool refrigerator display

What Does Error Code 18 C Mean on a Whirlpool Refrigerator?

Ice maker fault — ice maker not cycling correctly.

The control board monitors the ice maker's harvest cycle and its mold thermistor. Code 18 C fires when the module fails to eject a batch within the expected time or when the thermistor reads outside its valid temperature range, so the board halts further cycles. Unlike water-fill or dispenser codes, this points at the ice maker head itself rather than the valve or door components, which is why the rest of the refrigerator keeps cooling normally.

Models affected: Whirlpool refrigerators with an automatic ice maker, including French-door and side-by-side models such as the WRS325SDHZ, WRX735SDHZ, and WRF555SDFZ; basic top-freezers without a factory ice maker are less likely to display it.
What owners report: Owners commonly report this code after cubes fuse into a solid clump or a slow water line lets ice freeze mid-mold, and clearing the jam or a simple power cycle often clears it. It also tends to appear if the ice maker was recently switched off and on, so a fresh harvest attempt is worth trying before ordering parts.

What Causes Error Code 18 C?

Here are the most common causes in order of frequency. Start with the most likely cause before moving to the next:

  1. 1
    Ice maker assembly failure 40% of cases
  2. 2
    Ice jammed in the mold or ejector 25% of cases
  3. 3
    Failed ice maker thermistor 20% of cases
  4. 4
    Water supply to ice maker restricted 15% of cases

How to Fix Whirlpool Refrigerator Error Code 18 C

🔧🔧 Moderate DIY Est. time: 30–60 min
⚡ Safety first: Unplug the appliance before opening any panels or touching internal components.
  1. 1

    Clear jammed ice

    Remove the ice bin and check the mold/ejector for fused cubes; let any blockage melt or remove it gently.

  2. 2

    Power cycle the ice maker

    Switch the ice maker off for a minute (or unplug the fridge 5 minutes) and let it attempt a fresh harvest cycle.

  3. 3

    Replace the ice maker assembly

    Modern ice makers are replaced as a unit when the motor module or thermistor fails.

    🔩 Whirlpool ice maker assembly ($90–$180)

How to Reset Error Code 18 C

Turn the ice maker off and back on, or unplug the refrigerator for 5 minutes.

Note: If the error returns after resetting, the underlying issue has not been resolved. Work through the fix steps above.

Full Whirlpool refrigerator reset guide → Enter diagnostic mode → Symptom guide: Ice maker not working →

Did this guide fix your appliance?

When to Call a Professional

If a new ice maker still throws 18 C, the harness or control board needs professional testing.

Average professional repair cost for this issue: $150–$320

Related Error Codes

PO
Power outage indicator — power was interrupted
✓ Low Severity
CF
Communication failure between control boards
⚠ Medium Severity

Find Replacement Parts

Use these links to find the exact replacement parts for your Whirlpool Refrigerator:

🔩
Search PartSelect
Whirlpool Refrigerator repair parts
🔧
Search RepairClinic
Step-by-step video guides

External links — ApplianceErrors.com is not affiliated with these retailers.

More Whirlpool Refrigerator Error Codes

SY EF Evaporator fan motor failure SY CF Condenser fan motor failure E0 Freezer thermistor failure

Frequently Asked Questions

Can I keep using my Whirlpool Refrigerator when error 18 C appears? +
Usually yes — 18 C is a low-severity ice-maker notice that rarely stops the refrigerator from working, but clearing the underlying cause prevents it from escalating.
What most commonly causes 18 C on a Whirlpool Refrigerator? +
Across reported Whirlpool refrigerator repairs, the most frequent is ice maker assembly failure (40% of cases), ice jammed in the mold or ejector (25%), then failed ice maker thermistor (20%). Check them in that order before replacing any parts.
18 C keeps coming back after a reset — what should I check next? +
A reset only clears the stored 18 C fault; if it returns, the ice-maker problem is still present. Move on to the physical checks — clear jammed ice, then power cycle the ice maker — since the code will reappear until the root cause is resolved. This is a moderate job — a multimeter and some disassembly are usually involved.
How much does it cost to fix Whirlpool Refrigerator error 18 C? +
A DIY repair typically runs $0–$180 in parts, versus $150–$320 for a professional service call, so handling it yourself saves around $150. Expect the work to take roughly 30–60 minutes.
Which Whirlpool Refrigerator models show error 18 C? +
18 C is documented on Whirlpool refrigerators with an automatic ice maker, including French-door and side-by-side models such as the WRS325SDHZ, WRX735SDHZ, and WRF555SDFZ; basic top-freezers without a factory ice maker are less likely to display it.. Other units sharing the same control platform can display it too, so the fixes here generally transfer across the series.

Sources & References

Content verified against manufacturer service documentation. Last verified: June 11, 2026.

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