F23 Serious Moderate DIY

Maytag Dryer F23 — Exhaust Thermistor Open Circuit

Maytag Dryer · Error code F23

What F23 Means

The control detects an open circuit on the exhaust thermistor sensor line. The dryer will not heat.

Symptoms

  • F23 on display
  • No heat during cycle
  • Dryer stops shortly after starting
  • Clothes still damp

Common Causes

1
Open thermistor

Internal break in the thermistor element.

2
Disconnected sensor harness

Connector at thermistor or ACU has pulled off.

3
Cut or pinched wire

Wire damaged during prior service or by sharp metal edge.

4
Failed ACU input circuit

Rare — board failure on the thermistor input.

How to Fix It

  1. Unplug the dryer.
  2. Locate the exhaust thermistor on the blower housing and check the connector is fully seated.
  3. Measure thermistor resistance — should be roughly 10 kΩ at room temperature; an infinite reading means open.
  4. Replace thermistor if open.
  5. If thermistor is good, check continuity of the harness from thermistor to ACU connector.
  6. Reassemble, restore power, run a heated cycle to verify.

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.

Common replacement Maytag dryer exhaust thermistor View on Amazon→

More Maytag Dryer Codes

AF AF — Airflow Restricted dET dET — Detergent / Dispenser Not Detected (Steam Models) E1 E1 — Thermistor Open Circuit (Generic) E2 E2 — Thermistor Shorted F01 F01 — Main Control Board Fault F02 F02 — Keypad / User Interface Stuck Key

All Maytag codes → All dryer codes →

Verified against manufacturer documentation: maytag.com

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