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Error code · Washer

GE UltraFresh Washer Code 15: Thermistor Missing or Unreadable

Code 15 on GE UltraFresh front-load washers (GFW510, GFW550, GFW650 and GFW850 series, 2020 and newer) means the water temperature thermistor is disconnected, missing or no longer reading as a working sensor. The control then cannot…

Medium · inspection needed
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Code
15
Appliance
Washer
Brand
GE
Warranty
30-day workmanship

What 15 means

Code 15 on GE UltraFresh front-load washers (GFW510, GFW550, GFW650 and GFW850 series, 2020 and newer) means the water temperature thermistor is disconnected, missing or no longer reading as a working sensor. The control then cannot judge water temperature. A technician reads the number in the stored error history, and these models may show it on the display too. Owners may see wrong wash temperatures, cycles that skip heating steps, or a cycle that will not finish.

Common causes of 15

  • Thermistor connector that has worked loose
  • Open or damaged wiring to the thermistor
  • The thermistor itself reading as absent
  • Control input for the temperature circuit
✓ One safe check you can try

1. Stop the cycle and note which temperature setting you were using. 2. Run a short cold-water cycle to see whether the washer still completes normally. 3. Keep the door and detergent drawer clear and do not pull panels off to look for the sensor.

! Why to stop there
  • A reading that is open or out of range could be the sensor, its wiring or the input at the control, and only testing tells them apart
  • We check the thermistor circuit and compare its response to the water temperature
  • The written price is approved before work starts, and the repair has a 30-day workmanship warranty
Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.
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Other Washer codes

70GE UltraFresh Washer Code 70: Inverter Start-Up Repeats 78GE UltraFresh Washer Code 78: Board Software Mismatch 85GE UltraFresh Washer Code 85: Voltage Out of Range Door / doorGE UltraFresh Washer Message "Door": Open the Door Before the Next Cycle LidGE Top-Load Washer Message "Lid": Open and Close the Lid to Continue Lid Locked light flashingGE Top-Load Washer Lid Locked Light Flashing: Three Cycles, No Lid Opened Fill light blinkingGE Top-Load Washer Fill Light Blinking: Two Blinks for No Water, Three for Open Lid Wash and Rinse lights blinkingGE Spacemaker Washer Wash and Rinse Lights Blinking: Water Not Entering
1515 questions
Why is my wash not hot?

With the thermistor unreadable, the control cannot confirm water temperature, so it may skip or shorten heated steps. We confirm the sensor circuit before suggesting a repair.

What is the thermistor?

It is the small sensor that tells the control how warm the water is. When it reads as absent, the control cannot manage heated steps properly.

Is the washer safe to run?

Cold cycles are generally fine, but we recommend having the circuit checked so heated cycles work again. Hot cycles are the ones affected, so skip them until the temperature reading is confirmed working again.

Book a visit

Still seeing 15?

A technician diagnoses it on site and gives you the price in writing before any work starts.

(713) 547-5545