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.

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: geappliances.com ↗

How to fix it

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).
If thermistor is in spec, ohm-out the harness back to the control connector.
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
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More GE dishwasher codes

1h 1h — Delay Start Active 888 888 — Display Self-Test / Demo 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

All GE codes → All dishwasher codes →

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: geappliances.com.