Kenmore Dryer F23 error code
The exhaust thermistor has shorted. The temperature reading is stuck or invalid, so the dryer shuts off instead of overheating.
Also shown as: F23, F 23, F-23
Last updated: October 6, 2026
What causes the F23 error?
- Shorted exhaust (outlet) thermistor
- Pinched or melted thermistor wiring touching metal
- Moisture or lint bridging the sensor contacts
- Failed main control board
How to fix Kenmore F23 — step by step
Work through these in order, from simplest and safest first. Stop as soon as the code clears.
- Power-reset the dryer
Unplug the dryer for 5 minutes, plug it back in, and try a cycle. If F23 returns, the short is still present. - Clean the lint screen and vent
Clear the lint screen and check the vent path for blockages. Overheating from blocked airflow can damage the thermistor and its wiring. - Inspect the thermistor wiring
Unplug the dryer and find the exhaust thermistor near the blower housing. Look for pinched, melted, or bare wires touching the frame. Push the connector on firmly. A technician can confirm a shorted thermistor with a resistance test.Safety warning: Unplug the dryer before touching any internal wiring or sensor.
When to call a technician
- F23 returns after a reset with a clean vent
- The thermistor tests shorted
- Wiring is melted, pinched, or bare
- The main control board needs replacement
Frequently asked questions
What does F23 mean on a Kenmore dryer?
It means the exhaust thermistor, the sensor measuring hot air leaving the drum, has shorted out. The dryer stops because it cannot trust the temperature reading.
What is the difference between F22 and F23?
F22 means the exhaust sensor circuit is open (broken connection). F23 means it is shorted (signal stuck). Both stop the dryer and both point at the same sensor.
Can a clogged vent cause F23?
A badly clogged vent can overheat and damage the thermistor or its wiring, which can lead to F23. Keep the vent clear as prevention.
Sources
Every meaning and fix above was checked against official manufacturer documentation:
FixCode provides general troubleshooting information only — not professional repair advice. If you are unsure about any step, stop and call a qualified technician. Repairs done incorrectly can be dangerous and may void your warranty.