Amana Tumble Dryer Error Code E1: Thermostat Open... | appliancefaults.com

Technical Background:

The MCU (Main Control Unit) monitors the high-limit thermostat circuit for continuity. When the thermostat opens due to overheating or a fault, the MCU detects an open circuit and displays error code E1. The MCU interprets the open circuit as a safety hazard to prevent damage to the dryer. This path typically runs on 120V AC.

Symptoms:

The Amana tumble dryer displays error code E1 and stops operating. The dryer may not heat up or may shut down prematurely during the drying cycle. The homeowner might also notice a burning smell if the vent is severely blocked.

Possible Causes:

Open high-limit thermostat.
Faulty wiring between the thermostat and the control board.
Defective control board (MCU).
Blocked vent causing overheating and thermostat tripping.
Loose connection at the thermostat or control board.

Solution:

1

Disconnect power to the dryer at the breaker panel. Verify with a non-contact voltage tester.
2

Locate the high-limit thermostat on the blower housing or heating element assembly. Usually held in place with a screw or clip.
3

Using a multimeter set to continuity, test for continuity across the thermostat terminals. A reading of OL or no continuity indicates an open thermostat. A closed thermostat will read near zero ohms.
4

If the thermostat is open, replace it with a new one. Ensure the replacement thermostat has the same temperature rating.
5

Inspect the wiring harness and connectors between the thermostat and the control board for any damage or loose connections. Repair or replace as necessary. Use a wiring diagram for tracing.
6

After replacing the thermostat and checking the wiring, reconnect power to the dryer. Using a clamp meter, check the amp draw on the heating element during a test cycle. It should be within the manufacturer's specified range. Expect around 20 amps on a 240V circuit.
7

Run a test cycle to ensure the E1 error code is cleared and the dryer is functioning properly. Monitor the dryer for proper heating and venting.

Safety Warning:

Disconnect power to the dryer at the breaker panel before performing any repairs. Capacitors can hold a charge even after the dryer is unplugged. Use extreme caution when working with electrical components. Lock Out/Tag Out procedures must be followed. High voltage is present when the dryer is operating.

Prevention:

Clean the lint filter after every load. Regularly inspect and clean the dryer vent ductwork to ensure proper airflow. Schedule licensed technician dryer maintenance annually to check for potential issues and prevent overheating.

Expert Tip:

Many Amana dryers have a diagnostic mode. To enter the diagnostic mode, press and hold the Start/Pause button along with another button (consult the service manual for the correct button combination). The display will show error codes and allow you to run diagnostic tests. A thermal fuse is another possible source of the issue if E1 persists after thermostat replacement. This will need checking with your multimeter.

Follow-up Questions:

Frequently Asked Questions

•What is the correct temperature rating for the high-limit thermostat in my Amana dryer?

The correct temperature rating for the high-limit thermostat is typically stamped on the thermostat itself. Consult the dryer's service manual or parts diagram for the exact specification. Typically, it will be around 250-300 degrees Fahrenheit.

•How do I properly clean my dryer vent ductwork?

Disconnect the dryer vent from the dryer and the wall. Use a dryer vent cleaning kit with a long brush to remove lint buildup from the duct. You can also use a vacuum cleaner to remove loose lint. Ensure the duct is properly reconnected and sealed after cleaning.

•Where can I find a wiring diagram for my Amana dryer model?

A wiring diagram is usually included in the dryer's service manual. You may be able to find a copy online or order one from a parts supplier. The diagram is often located inside the dryer cabinet on a sticker.

Amana Tumble Dryer Error Code E1: Thermostat Open Circuit Troubleshooting

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the correct temperature rating for the high-limit thermostat in my Amana dryer?

•How do I properly clean my dryer vent ductwork?

•Where can I find a wiring diagram for my Amana dryer model?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: