GE · Dishwasher Moderate

C7 — Water Temperature Sensor (Thermistor) Fault

C7 specifically points to an out-of-range or open/shorted water temperature sensor (thermistor) circuit.

Keep using it?
Yes, with caution
DIY difficulty
Hard
Verified against
products.geappliances.com ↗

How to fix it

  1. Disconnect power.
  2. Locate the thermistor at the sump and disconnect the harness.
  3. Measure resistance at room temperature; compare to GE tech sheet (typically ~50K ohm).
  4. If thermistor is in spec, ohm-out the harness back to the control connector.
  5. If sensor and harness are good, replace the main control board.

Why it happens

Typical signs: C7 on display · No heat or excessive heat · Cycles abort early

  • Open or shorted thermistor NTC sensor failed open (infinite) or short (near zero).
  • Damaged thermistor harness Conductors broken or pinched between sump and main control.
  • Failed main control board Reference voltage or A/D channel for the sensor failed on the board.

Parts you may need

If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.

  • GE dishwasher temperature sensor / thermistor Common replacement
    Amazon →

More GE dishwasher codes

1h 1h — Delay Start Active C1 C1 Error — Slow Drain (Over 2 Minutes) C2 C2 Error — Drain Cycle Too Long (Over 7 Minutes) C4 C4 — Overfill / Filled Twice After Power Loss C5 C5 — Underfill / Short Drain Time C8 C8 — Detergent Dispenser Fault

All GE codes → All dishwasher codes →

Frequently asked questions

What does the C7 code mean on a GE dishwasher?

C7 specifically points to an out-of-range or open/shorted water temperature sensor (thermistor) circuit.

What causes the C7 code on a GE dishwasher?

Open or shorted thermistor: NTC sensor failed open (infinite) or short (near zero). Damaged thermistor harness: Conductors broken or pinched between sump and main control. Failed main control board: Reference voltage or A/D channel for the sensor failed on the board.

Is it safe to keep using a GE dishwasher with a C7 error?

Yes, with caution. This is rated a moderate-severity fault.

How do I fix C7 on a GE dishwasher?

Disconnect power. Locate the thermistor at the sump and disconnect the harness. Measure resistance at room temperature; compare to GE tech sheet (typically ~50K ohm).

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: products.geappliances.com.