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Error code reference

Maytag Dryer Error Code 21

Selected dryer temperature not reached.

Maytag codesMaytag dryer codes

Selected dryer temperature not reached.

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What 21 means on a Maytag dryer

Error code 21 on a Maytag dryer indicates the control board monitored the drum temperature during a cycle and determined that the selected temperature setting was not reached within the expected timeframe. This points to a failure in the heating system, which could involve the heating element, thermal fuse, gas valve (on gas models), high-limit thermostat, cycling thermostat, or restricted airflow preventing heat from building up properly inside the drum.

In plain terms, your dryer is running but not getting hot enough to match the temperature you selected. The dryer's sensor is reading air temperature inside the drum and reporting back to the control board that the heat level is too low. This can happen because a part responsible for generating or regulating heat has failed, or because a clogged exhaust vent is blocking airflow and preventing the system from cycling heat correctly.

On electric models, a burned-out heating element or a blown thermal fuse is the most frequent culprit. On gas models, a failed gas valve coil or igniter is more likely. A blocked lint screen or clogged exhaust duct can also trigger this code by starving the dryer of the airflow it needs to reach and sustain temperature. Addressing airflow restrictions first is a good starting point before replacing any components.

Source: manufacturer service documentation.

Common causes of 21

  1. 01

    Blown thermal fuse

    Part replacement

    The thermal fuse is a one-time safety device that cuts power to the heating circuit if the dryer overheats. Once blown, it prevents the heating element or gas burner from operating, meaning the dryer runs but produces no heat and cannot reach the selected temperature.

  2. 02

    Failed heating element (electric models)

    Part replacement

    The heating element generates heat inside the dryer drum. If the element burns out or breaks, the dryer tumbles normally but produces little to no heat, directly triggering error code 21 because the selected temperature is never reached.

  3. 03

    Defective gas valve coils or igniter (gas models)

    Part replacement

    Gas valve coils energize to open the valve and allow gas flow to the burner, while the igniter lights the flame. If either component fails, the burner will not ignite or will ignite only briefly, resulting in insufficient heat to meet the selected temperature setting.

  4. 04

    Clogged exhaust vent or lint screen

    Wiring / connection

    Blocked airflow from a packed lint screen or obstructed exhaust duct traps moisture and prevents proper heat circulation, which can prevent the dryer from reaching and sustaining the selected temperature. Clearing the obstruction may resolve the code without replacing any parts.

See the test procedure for each cause

Frequently asked questions about 21

What does error code 21 mean on a Maytag dryer?
Error code 21 means the control board detected that the dryer did not reach the temperature you selected during the cycle. The heating system, whether electric or gas, failed to produce enough heat. The cause is typically a blown thermal fuse, a burned-out heating element on electric models, failed gas valve coils on gas models, or a clogged exhaust vent restricting airflow.
How do I fix error code 21 on a Maytag dryer?
Start by cleaning the lint screen and checking the exhaust duct from the back of the dryer to the exterior vent for blockages. If airflow is clear, use a multimeter to test the thermal fuse for continuity. A blown thermal fuse reads open and must be replaced. On electric models, test the heating element next. On gas models, inspect the igniter and gas valve coils. Replace whichever component tests as failed.
Is it safe to keep using my Maytag dryer with error code 21 active?
The dryer is not producing adequate heat, so clothes will not dry properly and cycles will run longer than normal. There is no immediate fire or shock hazard from the code itself, but continued use with a clogged vent, which can cause the code, does pose a fire risk. Diagnose and repair the issue before regular use.
How much does it cost to fix error code 21 on a Maytag dryer?
A thermal fuse typically costs $5 to $15 for the part and is a common DIY repair. A heating element runs $20 to $50 for the part. Gas valve coil kits are usually $20 to $40. If you hire a technician, expect $100 to $200 total depending on labor rates and the part needed. Vent cleaning costs nothing if done yourself or $80 to $150 if you hire a service.
Can a clogged dryer vent cause error code 21 on a Maytag dryer?
Yes. A blocked exhaust vent restricts airflow through the drum, which prevents heat from building to the selected level and can trigger error code 21. It can also cause the thermal fuse to blow from overheating, which would then keep triggering the code even after the vent is cleared. Always check and clean the vent before replacing parts.

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