GE Appliances dishwasher C7: temperature sensor fault
C7 means: Water temperature sensor (thermistor) circuit failure; on some models, turbidity sensor.
How to fix C7
- Reset at the breaker.
- Check the thermistor plug at the sump and on the board.
- Replace the thermistor; it is a small, cheap part in the sump.
When to stop and call a repairer
Disconnect power first.
What it costs
Parts: Thermistor $15 to $30.
Service: A home visit from an appliance technician runs $120 to $250 for diagnosis plus the part. Boards are the expensive part; sensors and switches are cheap.
Worth repairing? Yes.
How to check the error log
On most GE dishwashers, hold Start for 5 seconds with the door open to enter the service menu; on models with a hidden display, press Select Cycle and Start together for 5 seconds. The last error shows on the display. Turn power off at the breaker for 60 seconds to reset the board.
Clear the log after a repair so you can tell whether the fault has really gone.
FAQ
What does C7 mean on the GE Appliances dishwasher?
Water temperature sensor (thermistor) circuit failure; on some models, turbidity sensor. The board cannot read the water temperature sensor. Loose plug or a failed thermistor. On some models the same code is the turbidity (soil) sensor.
Can I fix C7 myself?
DIY difficulty: moderate. Reset at the breaker. Check the thermistor plug at the sump and on the board.
How much does it cost to fix C7?
Thermistor $15 to $30. A home visit from an appliance technician runs $120 to $250 for diagnosis plus the part. Boards are the expensive part; sensors and switches are cheap.
Is it worth repairing?
Yes.
C7 during startup or during use?
GE Appliances dishwashers report C7 any. That timing is a useful clue when narrowing the cause.
Can I keep using the machine with C7 showing?
Usually you can finish the drink you are making, but do not ignore it — the underlying fault rarely heals itself. Work through the cheap checks first.
Will C7 clear on its own?
Sometimes. Try the reset and cleaning steps first — they cost nothing and clear the milder cases. A code that returns within a day or two needs the parts fix.
How long does the repair take?
Thirty minutes to an hour if you are comfortable opening the case; budget an afternoon the first time.
Code meanings are compiled from manufacturer service references and repair documentation for the GDT / GDF / GDP / Profile / Cafe; fixes follow documented repairs and owner reports. Model revisions can differ. If your appliance is under warranty, contact the manufacturer before opening it.