GE Washing Machine Temperature Sensor Replacement — Fixing Water Temperature Problems

GE washers use a temperature sensor (NTC thermistor) to monitor wash water temperature. The control board reads the sensor and adjusts the hot and cold water inlet valves to achieve the selected temperature. When the sensor fails, the board receives incorrect temperature data and produces wash water that is too hot, too cold, or inconsistent.

How It Works

The temperature sensor is a small thermistor probe mounted in the outer tub or near the sump where it contacts the wash water directly. Like all NTC (negative temperature coefficient) thermistors, its resistance decreases as temperature increases. The board converts resistance readings to temperature values and compares against the target temperature for the selected cycle.

Symptoms

• Water too cold on warm/hot settings — the sensor reads artificially high (telling the board the water is already hot), so the board does not open the hot valve sufficiently
• Water too hot on cold settings — the sensor reads artificially low, prompting the board to add hot water
• Inconsistent water temperature — the sensor is intermittent, giving the board erratic readings
• Error code related to temperature — on display-equipped models, a temperature sensor fault code may appear

Before Condemning the Sensor

Check the hot and cold supply valves — both must be fully open. If the hot supply is turned off or the hot water heater is off, the washer cannot produce warm or hot wash water regardless of sensor condition.

Also test the inlet valve solenoids with a multimeter. If the hot water solenoid in the inlet valve has failed, only cold water enters the machine. This is a valve problem, not a sensor problem.

Testing the Sensor

Remove the sensor from the tub and allow it to reach room temperature (about 70 degrees F). Test with a multimeter:

An open circuit (OL) or reading far outside these values confirms sensor failure.

Part Numbers and Pricing

Step-by-Step Replacement

Locating the Sensor

The temperature sensor is inside the tub — typically at the bottom rear. On front-load washers, access from the rear panel. On top-load washers, the sensor may be accessible from the bottom (tilt the washer back) or through the console area.

Replacement

Unplug the washer. Access the sensor location. Disconnect the wire harness. Remove the sensor from its housing (pull-out or unscrew). Install the new sensor, ensuring the probe tip sits fully in the water path. Reconnect the wire harness.

Testing

Run a warm wash cycle and check water temperature with a thermometer — target is approximately 90-110 degrees F for a warm setting. Run a hot cycle — target is approximately 120-130 degrees F.

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Water temperature problems affect cleaning performance and fabric care. Our technicians test the sensor, inlet valves, and supply lines in one visit. Book service