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The PrE2 error on your GE Dishwasher means the control board has detected a problem with the water temperature sensor (thermistor) during the prewash heating phase. Most owners can clear it with a power reset, but if it keeps coming back the sensor or wiring harness likely needs replacing.
| Error code | PrE2 |
|---|---|
| Meaning | Prewash temperature sensor fault detected by the control board |
| Severity | Medium — dishwasher may still run but won’t heat water properly |
| Time to fix | 15–45 minutes |
| Tools needed | Multimeter, screwdriver (Phillips) |
What the PrE2 error means
GE dishwashers use a thermistor to monitor water temperature during the prewash cycle so the machine knows when to trigger the heating element. When the control board receives no signal, an out-of-range signal, or a signal that doesn’t change as expected from this sensor, it flags the PrE2 code and often pauses or stops the wash cycle to prevent damage.
This is a control-level diagnostic error rather than a simple clog or blockage, so it usually points to an electrical or component fault somewhere in the heating circuit.
Common causes
- Faulty or degraded water temperature sensor (thermistor)
- Loose, corroded, or disconnected wiring harness connector at the sensor
- Control board glitch caused by a power surge or brief outage
- Heating element failure putting extra load on the sensor circuit
- Water inlet issue preventing the tub from filling enough for accurate heating readings
- Failing main control board itself
How to fix the PrE2 error
- Power cycle the dishwasher. Turn off power at the breaker for 5 minutes, then restore it. This clears many temporary control board errors, including ones similar to those seen on Ge Washing FL Error Code: Causes and Fixes for GE washers.
- Check the water supply and fill level. Make sure the dishwasher is filling with water properly during the cycle; a low fill can trigger a false sensor reading.
- Inspect the wiring harness. Pull the lower access panel and check the connector at the temperature sensor for corrosion, looseness, or damage. Reseat it firmly.
- Test the thermistor with a multimeter. Compare the resistance reading against GE’s spec chart for your model; a reading far outside range confirms a bad sensor.
- Replace the temperature sensor if it fails testing. This is a low-cost part and often resolves the PrE2 code permanently.
- Call a certified technician if the error persists. A control board replacement may be needed, similar to how persistent sensor faults are handled in Ge Washing IE Error Code: Causes and Fixes.
FAQ
Can I still run a wash cycle with the PrE2 error showing?
Sometimes the cycle continues but without proper water heating, which affects cleaning and drying performance. It’s best to fix the error before running another full load.
Is the PrE2 code the same as PrE1?
No. PrE1 and PrE2 refer to different points in the heating sequence, but both point to the same type of temperature sensor circuit fault, much like how Ge Washing OE Error Code: Causes and Fixes and its related codes share a common root cause on washers.
Do I need a technician to fix this myself?
Not always. If you’re comfortable testing resistance with a multimeter and swapping a sensor, many homeowners fix this without a service call. If wiring or the control board is involved, professional help is safer, as recommended in Ge Washing UE Error Code: Causes and Fixes and Maytag Washer F1 Error Code: Causes and Fixes.
