Kenmore Dryer F23 Error Code: Causes, Cost & Fix

What is the Kenmore Dryer F23 error?#

F23 on a Kenmore dryer is the mirror of the open-sensor code: the exhaust thermistor is reading a dead short, so the board thinks the air is cold and keeps the heat on, and the drum runs far too hot. Treat this one as urgent. Chronic overheating cooks the thermal fuse and can scorch a load, so I tell owners to stop using the dryer until the sensor is replaced.

F23 on a Kenmore Dryer: likely causes and repair cost#

On a Kenmore Dryer, the F23 code signals: exhaust sensor reading a dead short.

Typical professional repair: $75–$175 · Difficulty: moderate · usually a technician job

Symptoms that often accompany F23: The drum runs blisteringly hot; Loads come out overdried or singed; The thermal fuse keeps blowing out

Technician diagnostic sequence for F23:

1. Read the outlet bead cold — a dead short falls near zero, where a healthy sensor should sit up around ten thousand ohms
2. Unplug the bead and read it alone; a normal reading detached means the harness is grounding out somewhere
3. Hunt for a pinched lead near the heater housing where radiant heat crazes insulation and bares the copper
4. Dry any dampness across the plug, then renew the bead or splice the loom as the isolation test directs

Parts a technician may check or replace: exhaust thermistor

Field note: On the Whirlpool-platform 110-series Kenmore, a shorted exhaust thermistor feeds the board a false cold reading, so it keeps the heat on and the drum runs far too hot. Treat it as urgent — chronic overheating cooks the thermal fuse and can scorch a load, so replace the sensor before running another cycle.

How to troubleshoot the F23 error yourself#

This is a stop-using-it code, not a tinkering one, and the safety angle matters. If loads are coming out overdried or singed, or the thermal fuse keeps blowing, leave the dryer off — running it hot risks the clothes and the machine. There is no safe owner reset for a shorted heat sensor.

A technician works it the way the table above lays out: reading the outlet sensor cold and expecting a healthy value rather than the near-zero of a dead short, unplugging the sensor to test it alone, and — if it reads normal detached — hunting for a bare conductor grounding out against the frame near the hot heater housing. They will also dry any moisture bridging the plug. Because the false-cold reading drives the heat, the fix is replacing the sensor or repairing the shorted harness, and it belongs with a professional given the overheating risk.

Is the Kenmore Dryer F23 error worth fixing?#

F23 is inexpensive to fix and, given the safety stakes, well worth doing promptly. The table above lists $75 to $175 for a professional repair, essentially the exhaust sensor and, if needed, a harness splice plus labor. Against the cost of a new dryer — or worse, a scorched load or an overheat incident — that is money well spent on any sound machine. There is really no scenario where I would defer this one; the overheating makes it a repair-now situation.

Kenmore Dryer F23: frequently asked questions#

What does the F23 error mean on a Kenmore dryer?#

It means the exhaust sensor is reading a dead short, so the board sees a false cold reading and keeps heating. The result is a drum that runs dangerously hot.

Is it safe to keep using a Kenmore dryer showing F23?#

No. The dryer overheats, which can scorch loads and blow the thermal fuse. Stop using it and have the sensor replaced before running another cycle.

Can I clear the F23 error myself, or do I need a technician?#

There is no owner reset, and because of the overheating it should not be run. A technician tests the sensor and its wiring and replaces the shorted part.

How much does it cost to repair F23 on a Kenmore dryer?#

The table above lists $75 to $175 for a professional repair, typically the exhaust sensor and, if needed, a harness repair plus labor.

Which parts usually fail when a dryer throws F23?#

The exhaust thermistor shorting internally is the common cause, followed by a bare wire grounding on the frame or moisture bridging the sensor plug.

Is a Kenmore dryer with F23 worth repairing?#

Yes, and promptly. It is an inexpensive sensor, and the overheating risk makes fixing it clearly worthwhile on any usable dryer.

Why does a shorted sensor trigger F23?#

A shorted thermistor reads near zero, which the board interprets as very cold air. It therefore keeps calling for heat, the drum overheats, and the control flags F23.