How to Enter Diagnostic Mode on a GE Appliances Dishwasher

GE dishwashers show C-codes (wash system) and letter codes on the display; non-display models blink the Start light.

Step-by-Step: GE Appliances Dishwasher Diagnostics

1
Read the code: C-numbers cover the wash/drain system (C4 drain, C5 low water), letters cover sensors and status (FL flood, HO heating delay, PrS pressure sensor).
2
Non-display models: count Start/Status light blinks and match to the manual's table.
3
For C4: clear the air gap (if fitted), the disposer knockout on new installs, and the drain hose loop before condemning the pump.
4
Connected models report faults through the SmartHQ app.
5
The tech sheet behind the kick plate documents service-mode entry for your control revision.

💡 Good to know: HO is not an error — it means the unit is pausing to heat water. Long HO times usually mean the inlet water is too cold or the heater is weak.

Found a Code? Look It Up

Once diagnostics shows you a stored code, find its meaning and fix guide in the full GE Appliances dishwasher code list. These are the highest-priority codes on this platform:

Drain failure — dishwasher not draining

⚠ High Severity

Flood switch activated — water in base tray

⚠ High Severity

Wash motor failure — circulation pump not running

⚠ High Severity

Drain error — not draining properly

⚠ High Severity

Control board failure

⚠ High Severity

Frequently Asked Questions

What does HO mean on a GE dishwasher? +

Heating delay — the dishwasher is waiting for water to reach temperature. It is status, not a fault. If cycles run hours long, check inlet water temperature (should be ~120°F) and the heater.

How to Reset a GE Appliances Dishwasher → ← All GE Appliances Dishwasher Error Codes