Whirlpool Oven Error Code F3 E1: Thermistor Testing and... | appliancefaults.com

Technical Background:

The oven control board (MCU) monitors the oven temperature using the thermistor. The thermistor's resistance changes with temperature. The MCU interprets this resistance to control the heating elements. An F3 E1 error indicates that the MCU is detecting an out-of-range resistance value from the thermistor, suggesting a fault in the sensor or its circuit.

Symptoms:

The oven displays an F3 E1 error code, the oven may not heat properly, or the temperature displayed may be inaccurate.

Possible Causes:

Open or shorted oven temperature sensor (thermistor).
Faulty wiring harness or connections between the thermistor and the control board.
Defective oven control board (MCU).
High resistance in the thermistor circuit.
Loose connection at the sensor or control board.

Solution:

1

Disconnect power to the oven at the breaker panel.
2

Locate the oven temperature sensor (thermistor), usually at the rear of the oven cavity. Access from inside the oven after removing racks.
3

Disconnect the thermistor wires from the oven control board. Note the wire color sequence before disconnecting.
4

Using a multimeter set to ohms, measure the resistance of the thermistor. At room temperature (approx. 70°F), it should read approximately 1080 ohms. Refer to the service manual for the exact resistance chart at different temperatures. A Fluke 117 is ideal.
5

Check the wiring harness between the thermistor and the control board for continuity and shorts using your multimeter. Ensure proper wire connections at both ends.
6

Inspect the oven control board for any signs of damage, such as burnt components or loose connections. Use a bright flashlight.
7

If the thermistor resistance is significantly out of range or the wiring is damaged, replace the thermistor or wiring harness. If the control board is damaged, replace it.

Safety Warning:

Disconnect power to the appliance at the breaker panel before performing any repairs. High voltage is present in the oven, and failure to disconnect power can result in serious injury or death. Use proper Lock-Out/Tag-Out (LOTO) procedures.

Prevention:

Periodically check the oven temperature calibration to ensure accurate cooking. Avoid excessive oven cleaning products near the thermistor to prevent corrosion.

Expert Tip:

Many Whirlpool ovens have a service mode that allows you to test the thermistor reading directly from the control board. Refer to the service manual for the specific sequence to enter service mode. Look for a button combination (e.g., Cancel and Start held together for 3 seconds).

Frequently Asked Questions

•What is the exact resistance range I should expect from the thermistor at different temperatures?

Consult the appliance's service manual for a detailed thermistor resistance chart versus temperature. This is critical for accurate diagnosis.

•How do I access the oven control board?

The control board is typically located behind the control panel. You may need to remove screws or pry the panel open carefully. Refer to the service manual for your specific model.

•What are the part numbers for the thermistor and control board replacements?

The part numbers vary depending on the specific model number of your Whirlpool oven. You can find the correct part numbers by searching online using your model number or by contacting a parts supplier like RepairClinic or AppliancePartsPros.

Whirlpool Oven Error Code F3 E1: Thermistor Testing and Troubleshooting Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the exact resistance range I should expect from the thermistor at different temperatures?

•How do I access the oven control board?

•What are the part numbers for the thermistor and control board replacements?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: