What to check yourself
Step 1. Cut the power at the breaker for 30 seconds
GE's own first step for C7. A control that latched a single bad reading clears here. If the code is gone after the reset and stays gone, that was all it was.
Step 2. Look for water where it should not be
On many of these machines the thermistor sits inside the door, and a door that has been leaking at the bottom corners can wet its connector. Dry it out and reset again before assuming the sensor is dead.
What a technician will look at
Described so you know what you are paying for, not as steps to repeat.
Meter the thermistor
The sensor is a resistor whose value falls as it warms. The technician reads it at room temperature and compares to the chart for the model. Open circuit or a wildly wrong value means the sensor; a good value means the harness or the board.
Check the harness and connectors back to the control
A corroded pin or a chafed wire between the sensor and the board gives the same code as a dead sensor and costs a fraction to fix. It is worth insisting the technician checks this before quoting a board.
When to call a technician
As soon as the breaker reset has not cleared it. The sensor itself is cheap; the value of the visit is telling sensor from wiring from board, and that needs a meter and the chart.
What the repair costs
| Repair | Part only | Fitted by a technician |
|---|---|---|
| Breaker reset | - | Free |
| Diagnosis alone | - | $70 to $130 |
| Thermistor replacement | $30 to $45 | $125 to $300 |
| Harness or connector repair | - | $100 to $250 |
| Control board replacement | $95 to $220 | $200 to $500 |
A new machine of the same class runs $500 to $1,500. Once a quote passes about a third of that on an older appliance, the repair stops making sense.
Codes people confuse this with
Questions people ask
- The dishes are still coming out hot. How can the sensor be broken?
- The heater and the sensor are separate parts. A machine with a dead sensor may still heat on a timer, or heat too long. Do not take hot dishes as proof the code is wrong.
- Is the board likely?
- Least likely of the three. Sensor first, wiring second, board last, and on a machine this age a board quote is the point to price a replacement dishwasher.
Which machines this applies to
Applies to
Older GE, GE Profile and Hotpoint dishwashers with electronic controls: GSD, GHD, PDW, EDW, GLD and HDA model prefixes.
Last checked
2026-08-28