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Error code reference

GE Dryer Error Code 004

Outlet Thermistor Open

GE codesGE dryer codes

Outlet Thermistor Open - When the Outlet Thermistor's count of high readings exceeds the 10 threshold, an Outlet Thermistor Open Error is set.

First step from the service manual

Check and replace Outlet Thermistor if necessary.

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

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What 004 means on a GE dryer

Error code 004 on a GE dryer indicates an Outlet Thermistor Open condition. The outlet thermistor is a temperature-sensing component positioned in the dryer's exhaust airflow path. It monitors the temperature of air exiting the drum before it passes through the exhaust system. The control board continuously reads counts from this sensor, and when the number of high readings exceeds a threshold of 10, the board flags an open thermistor error and halts normal operation to prevent potential overheating.

An "open" thermistor error typically means the sensor's electrical circuit has been interrupted. Thermistors are resistive components, and when functioning correctly they vary their resistance in response to temperature changes. If the thermistor element fails internally, develops a broken lead, or loses its connection to the wiring harness, the control board receives readings that fall outside the expected range. Repeated abnormal readings trigger the error threshold and set code 004.

The most direct resolution is to inspect and test the outlet thermistor and its associated wiring. A failed thermistor will often show an open circuit when measured with a multimeter rather than a finite resistance value. Wiring problems such as corroded connectors, damaged harness wires, or a loose terminal at the thermistor or control board can also produce this fault without the thermistor itself being defective. Correcting the wiring issue or replacing the thermistor are the primary repair actions.

Source: manufacturer service documentation.

Common causes of 004

  1. 01

    Failed Outlet Thermistor

    Part replacement

    The thermistor element itself has burned out or failed internally, resulting in an open circuit. Testing with a multimeter will show no continuity or resistance across the thermistor terminals.

  2. 02

    Loose or Disconnected Wiring Connector

    Wiring / connection

    The connector at the thermistor or control board may have worked loose, interrupting the signal circuit. Inspect both ends of the thermistor harness for secure seating and firm contact.

  3. 03

    Damaged Wiring Harness

    Wiring / connection

    A wire in the thermistor circuit may be chafed, pinched, or broken, creating an open in the signal path. Visually trace the harness from the thermistor to the control board looking for visible damage.

  4. 04

    Corroded Terminals

    Wiring / connection

    Moisture or heat exposure can corrode the connector terminals at the thermistor, increasing resistance to the point where the control board registers an open circuit. Clean or replace the affected connector.

  5. 05

    Control Board Fault

    Part replacement

    In rare cases, the control board itself may misread the thermistor circuit and incorrectly set the error. This should only be considered after the thermistor and all associated wiring have been confirmed good.

See the test procedure for each cause

Frequently asked questions about 004

What does 004 mean on a GE dryer?
Error code 004 on a GE dryer indicates an Outlet Thermistor Open error. This means the control board detected an abnormal reading from the outlet thermistor, which monitors exhaust air temperature, more than 10 times and flagged a fault. The dryer stops operating to prevent unsafe conditions. The thermistor itself or its wiring circuit is the likely source of the problem.
Can I fix error code 004 on my GE dryer myself?
Many technicians and experienced DIYers can resolve this error by inspecting the outlet thermistor wiring for loose connectors or damage and replacing the thermistor if it tests as open on a multimeter. The thermistor is generally accessible and replacement involves disconnecting the wiring connector and swapping the component. If wiring or the control board is involved, the repair becomes more complex and may benefit from professional service.
Is it safe to run my GE dryer with error code 004 active?
Operating the dryer with this error active is not recommended. The outlet thermistor is part of the thermal monitoring system, and running the dryer without a functioning exhaust temperature sensor removes a safeguard against overheating. The dryer is designed to stop when this fault is detected for this reason. Resolve the fault before resuming normal use.
How much does it cost to fix a GE dryer with error code 004?
If only the outlet thermistor needs replacement, parts typically cost in the range of $10 to $40, making it one of the more affordable dryer repairs. If a wiring harness repair or control board replacement is required, total costs can rise to the range of $100 to $300 or more depending on parts and labor. Diagnosing the exact cause before purchasing parts helps avoid unnecessary expense.
Will resetting my GE dryer clear error code 004?
A power reset may temporarily clear the error display, but the code will return if the underlying problem with the outlet thermistor or its wiring has not been corrected. The control board sets the error after accumulating more than 10 high readings, so an unresolved fault will quickly re-trigger the code. A lasting fix requires inspecting and repairing or replacing the thermistor and associated wiring.

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