Amana Dryer Error Code E2: Thermostat Short Circuit... | appliancefaults.com

Technical Background:

The MCU monitors the temperature inside the dryer drum via thermostat circuits. The MCU expects to see a specific voltage drop across the thermostat(s). When the MCU detects a short circuit (0 Ohms or very low resistance) in either thermostat circuit, it interprets this as an unsafe condition and triggers the E2 error, shutting down the heating element. This prevents overheating and potential fire hazards.

Symptoms:

Homeowner reports the dryer not heating or shutting down unexpectedly with an E2 error code displayed on the control panel. Clothes may be damp or not drying at all.

Possible Causes:

Shorted high-limit thermostat.
Shorted operating thermostat.
Wire harness damage causing a short to ground.
Faulty MCU (Main Control Unit).
Loose connection at the thermostat or MCU.
Incorrect thermostat installed.

Solution:

1

Disconnect the dryer from the 120V AC outlet. Verify there is no voltage present at the outlet with a multimeter.
2

Remove the rear access panel to access the heating element and thermostats. A 1/4-inch nut driver is typically required.
3

Locate the high-limit thermostat on the blower housing. It's usually a bi-metal snap disc.
4

Disconnect the wires from the thermostat. Using a digital multimeter set to Ohms, test the continuity across the thermostat terminals. A reading of 0 Ohms or near 0 indicates a short. A good thermostat should read near 0 Ohms when below its rated temp.
5

Check the operating thermostat (usually on the heater housing) for shorts, using the same method.
6

Inspect the wiring harness between the thermostats and the MCU for any signs of damage or pinched wires. Repair or replace the harness as needed.
7

Reconnect all wires, plug the dryer back in, and test for proper operation. If the error code persists, the MCU may be faulty and require replacement.

Safety Warning:

Always disconnect power to the appliance before performing any repairs. Use extreme caution when working with electrical components. High voltage is present when the dryer is connected to power. Lock Out/Tag Out (LOTO) procedures should be followed.

Prevention:

Clean the lint filter before every load. Ensure proper ventilation by cleaning the dryer vent duct at least once a year. Avoid overloading the dryer.

Expert Tip:

Some Amana dryers have a diagnostic mode. Simultaneously press and hold the Start/Pause and End of Cycle Signal buttons for 3 seconds. Then press the Cycle Select button to navigate through the error codes. This may clear the E2 code temporarily, but it will return if the underlying problem is not addressed.

Frequently Asked Questions

•How do I identify the correct replacement thermostat?

Check the model number of the dryer and search for the thermostat part number. You can typically find this information on the manufacturer's website or appliance parts retailer. Match the voltage and temperature rating.

•Where is the MCU located in the dryer?

The MCU (Main Control Unit) is usually located behind the control panel on the front of the dryer. You may need to remove the control panel to access it.

•What is the typical resistance value of a normal operating thermostat?

A normal operating thermostat should show very low resistance (close to 0 Ohms) when it is below its rated temperature and the contacts are closed. An open circuit (infinite resistance) indicates the thermostat is open (above its rated temp or defective).

Amana Dryer Error Code E2: Thermostat Short Circuit Troubleshooting

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I identify the correct replacement thermostat?

•Where is the MCU located in the dryer?

•What is the typical resistance value of a normal operating thermostat?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: