Amana Range Error Code F31: Sensor Circuit Troubleshootin... | appliancefaults.com

Technical Background:

The F31 error code on an Amana range typically indicates a problem with the oven temperature sensor circuit. The main control unit (MCU) monitors the resistance of the sensor (usually an RTD or thermistor) to determine the oven temperature. The sensor's resistance changes with temperature, sending a signal to the MCU. If the MCU detects a resistance value that is outside the acceptable range, or an open or shorted circuit, it will display the F31 error.

Symptoms:

The homeowner reports that the Amana range displays an F31 error code on the control panel. The oven may not heat correctly, or it may shut off during operation. The display might intermittently show the error or constantly show it.

Possible Causes:

Open or shorted oven temperature sensor (RTD/thermistor)
Wiring harness issue between the sensor and the control board
Faulty connection at the sensor or control board
Defective electronic oven control (EOC) / MCU

Solution:

1

Disconnect power to the range at the breaker panel. Verify no voltage with a multimeter.
2

Locate the oven temperature sensor inside the oven cavity, typically at the rear.
3

Disconnect the sensor wires from the control board. Use a 1/4-inch nut driver to access the control panel.
4

Use a multimeter to measure the resistance of the sensor. A typical reading at room temperature (70°F) is around 1080 ohms. Consult the service manual for the exact specification.
5

Inspect the wiring harness for any signs of damage, such as burns or frayed wires. Check the connectors for corrosion.
6

If the sensor is faulty or the wiring is damaged, replace the sensor or repair the wiring harness.
7

Reconnect all wires, restore power, and test the range functionality. Monitor for the F31 error code. If the error persists, the EOC/MCU may need replacement.

Safety Warning:

Always disconnect power to the appliance at the breaker panel before attempting any repairs. Use proper lockout/tagout (LOTO) procedures to prevent accidental energization. The range contains high voltage components that can cause serious injury or death.

Prevention:

Avoid using abrasive cleaners inside the oven, as they can damage the sensor. Periodically inspect the wiring harness for any signs of wear or damage.

Expert Tip:

Some Amana ranges have a diagnostic mode that can provide more specific information about the sensor reading. Consult the service manual for the procedure to enter the diagnostic mode. Also, sometimes a loose connection can cause this error, so always double-check all connections.

Frequently Asked Questions

•What is the typical resistance range for the oven temperature sensor at different temperatures?

Refer to the service manual for the specific resistance chart for your model. Generally, the resistance increases as the temperature increases.

•How do I access the electronic oven control (EOC) to inspect or replace it?

The EOC is usually located behind the control panel. You will need to remove the screws holding the control panel in place. Be careful not to damage any wires or components.

•If the sensor and wiring are good, what is the likelihood that the EOC is the problem?

If the sensor and wiring are verified to be functioning correctly, the EOC is the most likely culprit. However, always double-check the wiring one last time to rule out intermittent connections.

Amana Range Error Code F31: Sensor Circuit Troubleshooting Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the typical resistance range for the oven temperature sensor at different temperatures?

•How do I access the electronic oven control (EOC) to inspect or replace it?

•If the sensor and wiring are good, what is the likelihood that the EOC is the problem?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: