mypros+
Error code reference

GE Dishwasher Error Code NORM flashes

Thermistor fault

GE codesGE dishwasher codes

Thermistor fault – thermistor stopped or temperature exceeds 175°F; program continues.

First step from the service manual

Check thermistor and main control.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

MyPros+ Max

Get the full diagnostic procedure for NORM flashes.

  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What NORM flashes means on a GE dishwasher

The NORM flashing error on a GE dishwasher indicates a thermistor fault. The thermistor is a temperature-sensing resistor embedded in the dishwasher's wash system that continuously monitors water temperature during the cycle. When the control detects that the thermistor has stopped responding (open or short circuit) or that the water temperature has exceeded 175°F, it logs this fault condition and flashes NORM on the display. Importantly, the dishwasher does not abort the cycle; it continues operation using default or fallback parameters, which is why catching this fault quickly matters for long-term reliability.

The thermistor communicates with the main control board by varying its electrical resistance as water temperature changes. A healthy thermistor produces a predictable resistance curve across the operating temperature range. If the resistance reads out of range, either too high (open circuit) or too low (short circuit), the main control interprets this as a sensor failure. Alternatively, if the thermistor is electrically sound but the water temperature genuinely reaches or exceeds 175°F due to a faulty heating element or a stuck relay on the control board, the same fault code is triggered.

Diagnostic work should begin with a resistance check of the thermistor itself, followed by inspection of the wiring harness connecting it to the main control board. Corroded pins, pinched wires, or loose connectors are common causes of intermittent readings that trigger this code. If the thermistor checks out within specification, the main control board should be evaluated for a stuck heating relay or other control logic failure that could be driving water temperature beyond the 175°F threshold.

Source: manufacturer service documentation.

Common causes of NORM flashes

  1. 01

    Faulty thermistor

    Part replacement

    The thermistor itself may have failed open or short, producing a resistance value outside the expected range. Testing the thermistor with a multimeter will reveal if it is reading correctly across temperature changes.

  2. 02

    Loose or corroded wiring connector

    Wiring / connection

    The connector between the thermistor and the main control board can corrode or loosen over time, causing intermittent or lost signal. Inspecting and reseating the connector often resolves false fault readings.

  3. 03

    Damaged wiring harness

    Part replacement

    A pinched, chafed, or broken wire in the harness running from the thermistor to the control board can mimic a sensor failure. Visually trace the harness and check for continuity at each wire.

  4. 04

    Stuck heating element relay on main control board

    Part replacement

    If a relay on the control board is stuck closed, the heating element may run continuously, pushing water temperature past 175°F and triggering the fault. This would cause a genuine over-temperature condition rather than a sensor failure.

  5. 05

    Failed main control board

    Part replacement

    If the thermistor and wiring both test good, the control board may be misreading the sensor signal due to an internal board fault. Board replacement is typically the last step after ruling out all other causes.

See the test procedure for each cause

Frequently asked questions about NORM flashes

What does NORM flashes mean on a GE dishwasher?
NORM flashing on a GE dishwasher signals a thermistor fault. This means the main control board has detected that the water temperature sensor has stopped responding correctly, or that the water temperature has exceeded 175°F. The dishwasher will continue running the cycle rather than stopping, but the temperature is no longer being accurately managed. Diagnostic attention is needed to determine whether the thermistor, wiring, or control board is at fault.
Can I fix the NORM flashing error myself?
A knowledgeable DIYer can handle several steps: inspecting and reseating the thermistor wiring connector, checking the harness for visible damage, and testing the thermistor's resistance with a multimeter. If the thermistor is confirmed faulty, replacing it is a moderately accessible repair. However, if the main control board is the root cause, replacement requires more comfort with appliance electronics and should be considered carefully before purchasing parts.
Is it safe to keep using my dishwasher while NORM is flashing?
The dishwasher will continue to complete cycles when NORM is flashing, but it is operating without reliable temperature monitoring. If the fault is caused by an over-temperature condition rather than just a bad sensor, continued use could stress internal components or affect wash quality. It is best to diagnose and resolve the fault before relying on the appliance for regular use.
How much does it cost to repair a NORM flashing error on a GE dishwasher?
Repair cost depends on the failed component. A replacement thermistor is typically an inexpensive part, often in the range of $15 to $40. A main control board is significantly more costly, generally ranging from $100 to $250 or more depending on the model. Adding professional labor, total repair costs can range from $80 to $350 depending on the diagnosis.
Will resetting the dishwasher clear the NORM flashing error?
Resetting the dishwasher may temporarily clear the displayed fault, but if the underlying issue with the thermistor, wiring, or control board has not been corrected, the code will return. A reset is useful for confirming whether the fault is intermittent or persistent, but it does not substitute for proper diagnosis and repair of the root cause.

Related GE dishwasher codes

All GE dishwasher codes
View all 222 GE dishwasher codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass