Amana · Dryer Moderate

F23 — Exhaust Thermistor Shorted

The control detects an electrically shorted exhaust (outlet) thermistor — the sensor that reads the temperature of the air leaving the drum. This is a different sensor from the inlet thermistor: F22 is the exhaust thermistor OPEN, F24 is the inlet thermistor open, and F25 is the inlet thermistor shorted.

Keep using it?
Yes, with caution
DIY difficulty
Moderate

How to fix it

  1. Unplug the dryer.
  2. Locate the exhaust (outlet) thermistor, typically mounted near the exhaust duct at the back of the cabinet.
  3. Measure the exhaust thermistor's resistance — it should read approximately 10,000 ohms at room temperature; a shorted sensor will read much lower.
  4. Inspect the thermistor's wire harness for a pinched or chafed wire that could be shorting the circuit.
  5. Replace the exhaust thermistor or repair the harness as needed.
  6. Clear the code and run a test cycle.

Why it happens

Typical signs: F23 displayed · No heat or weak heat · Long cycle times · Dryer shuts off early

  • Shorted exhaust (outlet) thermistor The outlet thermistor should read roughly 10,000 ohms at room temperature; a short reads well below that.
  • Bad wire harness Connector unseated or wire chafed against the frame, causing a short in the thermistor circuit.

Parts you may need

If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.

  • Amana dryer exhaust (outlet) thermistor Common replacement
    Amazon →

More Amana dryer codes

AF AF — Restricted Air Flow E1 E1 — Thermistor Open (legacy display) E2 E2 — Thermistor Shorted (legacy display) F01 F01 — Main Control Board Failure F02 F02 — Keypad / User Interface Stuck F22 F22 — Outlet Thermistor Fault

All Amana codes → All dryer codes →

Frequently asked questions

What does the F23 code mean on a Amana dryer?

The control detects an electrically shorted exhaust (outlet) thermistor — the sensor that reads the temperature of the air leaving the drum. This is a different sensor from the inlet thermistor: F22 is the exhaust thermistor OPEN, F24 is the inlet thermistor open, and F25 is the inlet thermistor shorted.

What causes the F23 code on a Amana dryer?

Shorted exhaust (outlet) thermistor: The outlet thermistor should read roughly 10,000 ohms at room temperature; a short reads well below that. Bad wire harness: Connector unseated or wire chafed against the frame, causing a short in the thermistor circuit.

Is it safe to keep using a Amana dryer with a F23 error?

Yes, with caution. This is rated a moderate-severity fault.

How do I fix F23 on a Amana dryer?

Unplug the dryer. Locate the exhaust (outlet) thermistor, typically mounted near the exhaust duct at the back of the cabinet. Measure the exhaust thermistor's resistance — it should read approximately 10,000 ohms at room temperature; a shorted sensor will read much lower.

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician.