What does Kenmore Microwave E2 Error Code - Causes & Fix mean?

E2 means thermistor error on Kenmore microwaves. The control board isn't reading valid temperature from the sensor. Replace the thermistor.

How do I fix Kenmore Microwave E2 Error Code - Causes & Fix?

Follow the step-by-step diagnosis below. The most likely fix is identified by checking power, sensor resistance, and control-board signals in order — using a multimeter and the part numbers documented in the parts reference table.

Can I keep running the equipment with E2 active?

Generally no. Faults on Appliance units are emitted when a sensor, safety, or control circuit is outside its operating envelope. Running through an active fault risks compressor, heater, or control-board damage. Diagnose and clear the fault first.

What part is most commonly replaced for Kenmore Microwave E2 Error Code - Causes & Fix?

The most frequently replaced parts for Kenmore Microwave E2 Error Code - Causes & Fix are listed in the Parts Reference section of this guide with OEM part numbers and typical price ranges. Check the table for direct replacements.

Is Kenmore Microwave E2 Error Code - Causes & Fix a DIY repair or do I need a technician?

Sensor swaps, fan motor replacements, and condenser cleaning are typical DIY-level repairs. Anything involving refrigerant, gas, or high-voltage (>240V) work requires a licensed technician for both safety and code-compliance reasons.

Kenmore Microwave E2 Error Code - Causes & Fix

Kenmore Microwave E2 Error Code — What It Means

The E2 error code on Kenmore microwaves indicates a thermistor or temperature-sensing error. The control board is not receiving a valid temperature signal from the oven cavity sensor circuit. This is part of a family of sensor-related codes on Kenmore microwaves, including F1 for open thermistor and F2/F3 for shorted thermistor conditions. The E2 code specifically tells you the control system has detected a fault in the temperature-sensing circuit and has locked out normal operation to protect the unit.

Because Kenmore is a private-label brand built by different manufacturers, the exact sensor type and location can vary by model. The first three digits of your model number identify the actual manufacturer. Regardless of who built it, E2 almost always points to the thermistor itself, the wiring harness connecting it to the control board, or a failure in the control board’s sensor input circuit.

Jump to Fix

Common Causes

Failed thermistor The temperature sensor in the oven cavity has drifted out of range, opened, or shorted internally and no longer reports valid resistance to the control board.
Loose or corroded wiring harness The connector between the thermistor and the control board has worked loose, corroded, or developed a broken wire that interrupts the sensor signal.
Control board sensor-circuit fault The main control board’s thermistor input circuit has failed and cannot correctly read or process the temperature signal even when the sensor itself tests good.
Damaged thermistor terminals The sensor terminals have burned or pitted from arcing or heat, creating high resistance or intermittent contact that the control reads as an out-of-range signal.

Step-by-Step Fix

Unplug the microwave from the wall outlet and leave it unplugged for at least two minutes to allow high-voltage capacitors to discharge before opening the cabinet.
Record the full model number from the rating plate inside the door or on the back panel so you can identify the actual manufacturer and locate the correct parts diagram and thermistor specification.
Remove the cabinet panels to access the thermistor, which is usually mounted on the side wall or top of the oven cavity, and inspect the sensor, terminals, and wiring harness for visible damage, burn marks, loose plugs, or corrosion.
Disconnect the thermistor from its harness connector and use a multimeter set to ohms to measure the resistance across the sensor terminals at room temperature, then compare the reading to the specification in your model’s service manual.
Check harness continuity from the thermistor plug all the way back to the control board connector if the sensor tests within range, looking for broken wires or high-resistance joints.
Replace the thermistor if it reads open, shorted, or out of specification, or replace the wiring harness if you find damaged conductors or corroded terminals.
Reinstall all panels, restore power, and run a short cook cycle to confirm the E2 code does not return and the microwave heats normally.

Parts Often Needed

Part	Notes
Microwave oven thermistor / temperature sensor	Amazon \| Primary suspect for E2. Match to your exact Kenmore model number and confirm the resistance specification before ordering.
Thermistor wiring harness	Amazon \| Replace if the connector or wires are damaged, burned, or corroded between the sensor and control board.
Microwave main control board	Amazon \| Required if the thermistor and harness both test correctly but the E2 fault persists. Confirm the board is the cause before ordering this expensive part.

When to Call a Pro

Call a qualified appliance technician if you are not comfortable working inside a microwave oven cabinet. Microwaves contain high-voltage capacitors and magnetron components that can store lethal charge even after the unit is unplugged. A technician has the meters, discharge tools, and training to safely diagnose sensor-circuit faults, measure thermistor resistance against the manufacturer specification for your exact model, and replace the control board if needed. If you have already replaced the thermistor and the E2 code returns, a pro can trace the harness and test the control board input circuit to isolate the fault without replacing parts by trial and error.