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GE Appliances Dishwasher Error Code C8

Reviewed by the ApplianceErrors Editorial Team · Verified against manufacturer service documentation · Last verified: July 19, 2026
✓ Low Severity 🔧 Easy DIY

Detergent dispenser cup blocked from opening fully

The most common cause of the C8 error on a GE Appliances dishwasher is tall item or pan blocking the dispenser door (~55% of cases); start with: remove the obstruction.

💰 DIY cost: $0–$80 👨‍🔧 Pro cost: $120–$240 Save $120+ by doing it yourself
GE Appliances Dishwasher error code C8 on the display panel
How the C8 code appears on a GE Appliances dishwasher display

What Does Error Code C8 Mean on a GE Appliances Dishwasher?

Detergent dispenser cup blocked from opening fully.

The control board expects the detergent cup latch to release and the door to swing open during the main wash. C8 fires when that motion is obstructed or the door fails to travel fully, so the board flags that detergent may not have dispensed on schedule. It differs from a wax-motor or wiring fault code because it points specifically at a physical blockage of the cup door rather than a failed actuator or sensor circuit.

Models affected: GE dishwashers with an electronically monitored detergent dispenser, including models such as GDF630PSMSS, GDT665SSNSS, and GDP630PYRFS
What owners report: Owners commonly report C8 after loading a tall pot, cutting board, or oversized item in the lower rack that leans against the dispenser, and clearing that item usually resolves it. It can be a false trigger from silverware shifting during the cycle, so rearranging the load before restarting is often the quick win.

What Causes Error Code C8?

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

  1. 1
    Tall item or pan blocking the dispenser door 55% of cases
  2. 2
    Silverware or utensil fallen against the cup 25% of cases
  3. 3
    Dispenser door spring or wax motor sticking 20% of cases

How to Fix GE Appliances Dishwasher Error Code C8

🔧 Easy DIY Est. time: 10–20 min
⚡ Safety first: Unplug the appliance before opening any panels or touching internal components.
  1. 1

    Remove the obstruction

    Take out the silverware, pan, or tall item blocking the dispenser, then close and latch the door.

  2. 2

    Wait for the cup to cycle

    Close the door and wait ~30 seconds for the cup to open.

  3. 3

    Inspect the dispenser door

    If nothing blocks it, the door spring or wax motor may be sticking.

    🔩 GE dishwasher detergent dispenser ($30–$80)

How to Reset Error Code C8

Clear the obstruction, latch the door, and wait 30 seconds for the cup to open.

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

Full GE Appliances dishwasher reset guide → Enter diagnostic mode →

Did this guide fix your appliance?

When to Call a Professional

If nothing blocks the cup but C8 persists, replace the detergent dispenser assembly.

Average professional repair cost for this issue: $120–$240

Find Replacement Parts

Use these links to find the exact replacement parts for your GE Appliances Dishwasher:

🔩
Search PartSelect
GE Appliances Dishwasher repair parts
🔧
Search RepairClinic
Step-by-step video guides

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

More GE Appliances Dishwasher Error Codes

C5 Drain failure — dishwasher not draining FL Flood switch activated — water in base tray C4 Wash motor failure — circulation pump not running PF Power failure — cycle interrupted by power outage OE Drain error — not draining properly C3 Control board failure

Frequently Asked Questions

Can I keep using my GE Appliances Dishwasher when error C8 appears? +
Usually yes — C8 is a low-severity dispenser notice that rarely stops the dishwasher from working, but clearing the underlying cause prevents it from escalating.
What most commonly causes C8 on a GE Appliances Dishwasher? +
Across reported GE Appliances dishwasher repairs, the most frequent is tall item or pan blocking the dispenser door (55% of cases), silverware or utensil fallen against the cup (25%), then dispenser door spring or wax motor sticking (20%). Check them in that order before replacing any parts.
C8 keeps coming back after a reset — what should I check next? +
A reset only clears the stored C8 fault; if it returns, the dispenser problem is still present. Move on to the physical checks — remove the obstruction, then wait for the cup to cycle — since the code will reappear until the root cause is resolved. This is a beginner-friendly job needing only basic hand tools.
How much does it cost to fix GE Appliances Dishwasher error C8? +
A DIY repair typically runs $0–$80 in parts, versus $120–$240 for a professional service call, so handling it yourself saves around $120. Expect the work to take about 10–20 minutes.
Which GE Appliances Dishwasher models show error C8? +
C8 is documented on GE dishwashers with an electronically monitored detergent dispenser, including models such as GDF630PSMSS, GDT665SSNSS, and GDP630PYRFS. 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: July 19, 2026.

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