Maytag Washer Error Code T-20

T-20 is a water temperature error code indicating the washer detected a temperature that falls outside the expected range for the active wash cycle. The fault is tied to the temperature sensing system, which includes the thermistor, water inlet valve, and control board. The machine stops operation and displays the code to signal that the temperature condition needs to be diagnosed and corrected before the cycle can resume.

You should not continue running the washer while T-20 is active. The machine has halted because it cannot confirm the water temperature is correct, which could result in clothes being washed in water that is too hot or too cold for the selected cycle. Continuing to force cycles could potentially cause further issues with the control system or damage delicate fabrics.

Repair costs depend on which component has failed. Replacing a thermistor or temperature sensor typically runs in the range of $20 to $80 for the part alone. A water inlet valve replacement generally costs $30 to $120 in parts. If a control board replacement is needed, parts alone can range from $100 to $350 or more, with professional labor adding to the total in all cases.

Some causes of T-20 are DIY-friendly, such as checking your home's hot water supply temperature or inspecting inlet hoses to make sure they are connected to the correct hot and cold ports. Testing and replacing the thermistor or water inlet valve requires basic electrical knowledge and a multimeter. If the control board is the root cause, professional repair is recommended given the complexity and cost involved.

A reset may temporarily clear the T-20 display, but the code will return if the underlying problem has not been resolved. To reset, unplug the washer for a few minutes and then restore power. If the error reappears during the next cycle, proceed with a full diagnostic of the temperature sensor, inlet valve, wiring, and hot water supply.