ApplianceErrors.com

GE Appliances Dishwasher Error Code HO

Reviewed by the ApplianceErrors Editorial Team · Verified against manufacturer service documentation · Last verified: June 10, 2026
⚠ Medium Severity 🔧 Easy DIY

Water not hot enough — incoming water temperature too low

The most common cause of the HO error on a GE Appliances dishwasher is home water heater temperature set too low (below 120°F/49°C) (~50% of cases); start with: run hot water at nearby sink.

💰 DIY cost: $0–$40 👨‍🔧 Pro cost: $100–$220 Save $100+ by doing it yourself
GE Appliances Dishwasher error code HO on the display panel
How the HO code appears on a GE Appliances dishwasher display

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

Water not hot enough — incoming water temperature too low.

HO ("hot") is a status indication rather than a hard fault: the control board reads the NTC thermistor and finds incoming water below the temperature it needs for an effective wash, so it pauses to heat the water in the tub, extending the cycle. It fires most often when the supply line still holds cooled water. Unlike PrS, which relates to cycle status/pause, HO specifically flags low water temperature, not a drain, fill, or leak problem.

Models affected: GE built-in dishwashers that display two-character status codes, including models such as GDF630PSMSS, GDT665SSNSS, and GDP630PYRFS, plus similar late-model tall-tub GE units
What owners report: Owners commonly report HO appearing at the start of a cycle, especially when the dishwasher is far from the water heater or run right after other hot-water use. Many find it clears on its own once the unit heats the water, and running the kitchen tap hot beforehand is the frequently cited quick win.

What Causes Error Code HO?

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

  1. 1
    Home water heater temperature set too low (below 120°F/49°C) 50% of cases
  2. 2
    Hot water run too long before cycle — hot water depleted 30% of cases
  3. 3
    NTC temperature sensor failure 20% of cases

How to Fix GE Appliances Dishwasher Error Code HO

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

    Run hot water at nearby sink

    Run the kitchen hot water faucet for 30–60 seconds before starting the dishwasher. This clears the cold water in the supply line.

  2. 2

    Check water heater temperature

    Set to at least 120°F (49°C).

  3. 3

    Test NTC sensor

    If water is hot at tap but HO persists, test the sensor.

    🔩 GE NTC sensor ($15–$40)

How to Reset Error Code HO

Run hot water at sink first, then restart cycle.

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 water heater is hot and sensor replaced but HO persists, the inlet valve hot side is not opening.

Average professional repair cost for this issue: $100–$220

Related Error Codes

PrS
Pressure sensor fault — water level sensing issue
⚠ Medium Severity

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 HO appears? +
You often can for a cycle or two, but the temperature issue behind HO will keep interrupting normal operation until it is fixed. Plan the repair rather than ignoring the code.
What most commonly causes HO on a GE Appliances Dishwasher? +
Across reported GE Appliances dishwasher repairs, the most frequent is home water heater temperature set too low (below 120°F/49°C) (50% of cases), hot water run too long before cycle — hot water depleted (30%), then nTC temperature sensor failure (20%). Check them in that order before replacing any parts.
HO keeps coming back after a reset — what should I check next? +
A reset only clears the stored HO fault; if it returns, the temperature problem is still present. Move on to the physical checks — run hot water at nearby sink, then check water heater temperature — 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 HO? +
A DIY repair typically runs $0–$40 in parts, versus $100–$220 for a professional service call, so handling it yourself saves around $100. Expect the work to take about 10–20 minutes.
Which GE Appliances Dishwasher models show error HO? +
HO is documented on GE built-in dishwashers that display two-character status codes, including models such as GDF630PSMSS, GDT665SSNSS, and GDP630PYRFS, plus similar late-model tall-tub GE units. 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 10, 2026.

← All GE Appliances Dishwasher Error Codes ← All GE Appliances Error Codes