mypros+
Error code reference

Amana Dryer Error Code F:23

Outlet thermistor has shorted.

Amana codesAmana dryer codes

Outlet thermistor has shorted.

First step from the service manual

See TEST #4a.

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 F:23.

  • 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 F:23 means on a Amana dryer

The F:23 error code on an Amana dryer indicates that the outlet thermistor has shorted. The outlet thermistor is a temperature-sensing component located at the exhaust outlet of the dryer. It monitors the temperature of the air leaving the drum and sends a resistance signal to the control board. Under normal operating conditions, thermistor resistance changes predictably as temperature rises or falls. A shorted thermistor sends an abnormally low or zero resistance reading to the control board, which the board interprets as a fault condition and triggers the F:23 code.

The most common causes of a shorted outlet thermistor include internal component failure within the thermistor itself, damaged or pinched wiring in the thermistor circuit, and moisture or heat damage to the connector terminals. A short differs from an open circuit failure: where an open thermistor sends no signal, a shorted thermistor sends a collapsed resistance reading that falls outside the acceptable range for normal operation. This condition can prevent the dryer from running or cause it to shut down prematurely to avoid potential overheating situations.

Diagnosis should begin with TEST #4a as specified in the dryer's diagnostic procedure. This test involves checking the thermistor's resistance with a multimeter and inspecting the wiring harness between the thermistor and the control board for shorts, damaged insulation, or failed connectors. If wiring checks out, the thermistor itself is likely defective and will need replacement.

Source: manufacturer service documentation.

Common causes of F:23

  1. 01

    Failed outlet thermistor

    Part replacement

    The thermistor itself has internally shorted, collapsing its resistance output. This is the most frequent cause and typically requires replacing the thermistor component.

  2. 02

    Damaged wiring harness

    Wiring / connection

    The wiring between the outlet thermistor and the control board may have pinched, frayed, or melted insulation causing two conductors to contact each other and create a short. Inspect the full length of the wire run visually and with a multimeter.

  3. 03

    Corroded or shorted connector terminals

    Wiring / connection

    Moisture or heat exposure can cause the thermistor connector terminals to corrode or bridge, creating a short circuit at the connection point. Inspect the connector for discoloration, corrosion, or melted plastic.

  4. 04

    Control board fault

    Part replacement

    In rare cases, a failure on the control board's thermistor input circuit can produce a false F:23 reading even when the thermistor and wiring are intact. The control board should only be suspected after the thermistor and wiring have been tested and confirmed good.

See the test procedure for each cause

Frequently asked questions about F:23

What does F:23 mean on a Amana dryer?
F:23 on an Amana dryer means the outlet thermistor has shorted. The outlet thermistor is a temperature sensor at the dryer's exhaust that monitors outgoing air temperature by sending a resistance signal to the control board. When the board detects a shorted condition, meaning the resistance has dropped to an abnormal level, it stops operation and displays F:23. Diagnosis begins with TEST #4a, which involves checking the thermistor resistance and inspecting the associated wiring circuit.
Can I fix the F:23 error on my Amana dryer myself?
A knowledgeable DIYer can attempt this repair by first inspecting the wiring harness and connectors connected to the outlet thermistor for visible damage or shorts. If the wiring appears intact, testing the thermistor with a multimeter to confirm a shorted reading will help confirm whether the thermistor itself needs replacement. Replacing the thermistor is a relatively straightforward repair. However, if the control board is suspected after other components test correctly, professional diagnosis is recommended.
Is it safe to use my Amana dryer when the F:23 code is showing?
You should not continue operating the dryer while F:23 is active. The outlet thermistor is part of the dryer's temperature monitoring system, and a shorted sensor means the control board cannot accurately track exhaust temperatures. Running the dryer without proper temperature feedback creates a risk of undetected overheating. Resolve the fault before resuming use.
Will resetting my Amana dryer clear the F:23 error code?
A power reset may temporarily clear the F:23 code, but if the outlet thermistor or its wiring is genuinely shorted, the code will return as soon as the dryer attempts to run again. Resetting does not address the underlying fault. The thermistor circuit must be tested and the defective component repaired or replaced to permanently resolve the error.
How much does it cost to repair an F:23 error on an Amana dryer?
If the outlet thermistor itself is the cause, the part typically costs in the range of $10 to $40 depending on the specific model. If professional labor is required, total repair costs including diagnosis and installation generally fall in the range of $80 to $200. If the control board is ultimately determined to be the cause, costs will be higher, often in the range of $150 to $350 or more for parts and labor.

Related Amana dryer codes

All Amana dryer codes
View all 38 Amana dryer codes

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

Get Started

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