GE Dishwasher Error Code F58

F58 means the control board detected an out-of-range high reading from the dry heater thermistor, which is the temperature sensor near the drying heating element. The board received a resistance value so low it corresponds to an unrealistically high temperature, so it shut down the drying function. The cause is usually a loose wiring connector, a shorted thermistor, or damaged wiring in the harness.

The wash cycles may still run, but the drying function will not operate normally while F58 is active because the control board has detected a fault in the dry heater thermistor circuit. Running the dishwasher in this state carries some risk, since the heater circuit's thermal protection is compromised. It is best to resolve the fault before continued use, particularly if you notice any burning smell or the dishwasher behaving erratically during cycles.

Disconnect power to the dishwasher, then locate and unplug the thermistor connector. Set a multimeter to measure resistance (ohms) and probe the two thermistor terminals. At room temperature, a good thermistor will read within the resistance range specified in your model's technical service sheet, commonly several thousand ohms for NTC-type thermistors. A reading near zero indicates a short and confirms the thermistor has failed and needs replacement. Your model's service manual will have the exact resistance specification.

Start by unplugging the dishwasher and locating the dry heater thermistor harness connector. Unplug it, inspect the terminals for bending or corrosion, reseat it firmly, and run a test cycle. If F58 returns, use a multimeter to test the thermistor's resistance at room temperature and compare it to the value listed in your model's service manual. A reading near zero ohms confirms a shorted thermistor that needs replacement. If the thermistor reads correctly, inspect the wiring harness for damage before suspecting the control board.

If only the thermistor needs replacement, the part typically costs between $15 and $40 depending on the model, and replacing it is a moderate DIY repair requiring basic hand tools and a multimeter. If a technician is needed, expect a service call fee of $80 to $150 plus parts and labor, bringing the total to roughly $150 to $250. A failed control board is the most expensive scenario, with parts alone ranging from $100 to $300.