Maytag Dryer Error Code 20

Error code 20 means the dryer's control board detected an over-temperature condition without a safety shutdown from the thermal limiter or hi-limit thermostat. In simple terms, the dryer is running hotter than it should and the system that is supposed to regulate heat is not functioning correctly. The most common causes are a clogged exhaust vent, a failed cycling thermostat, or a grounded heating element.

Begin by disconnecting the dryer and thoroughly cleaning the entire exhaust vent path, including the duct behind the dryer, the wall duct, and the exterior vent cap. Reconnect and run a test cycle. If code 20 returns, the next step is testing the cycling thermostat for continuity with a multimeter. A thermostat that reads open when at room temperature is defective and needs replacement. If the thermostat tests good, inspect the heating element for grounded coils.

Clearing the code without fixing the underlying cause will only result in the code returning during the next cycle. The control board will continue detecting the over-temperature condition as long as the root problem exists. Fix the cause first, then clear the code by cycling power to the dryer at the breaker for 30 seconds.

No. An active error code 20 indicates the dryer is reaching unsafe temperatures, which is a fire hazard. Do not run the dryer until you have identified and corrected the cause. Start by checking that the exhaust duct is fully clear and unkinked from the dryer to the exterior wall termination. If the vent is clear and the code returns, stop using the dryer until the cycling thermostat or heating element has been inspected and replaced as needed.

If a clogged vent is the cause, the fix is free aside from any cleaning tools. A replacement cycling thermostat typically costs $10 to $30 for the part, and the repair is a moderate DIY job requiring a multimeter and basic hand tools. A replacement heating element runs $20 to $60 depending on the model. If the control board is at fault, parts alone can reach $100 to $200, at which point professional diagnosis is worth the cost to confirm the board is actually defective before purchasing it.