GE Dishwasher Error Code F97

F97 means the control board detected an absent heat source during the cycle. The board monitors temperature using a thermistor and expects the water to reach a target temperature within a set time. When that does not happen, F97 is logged. The fault can originate from a low water level, a burned-out heating element, a bad thermistor, or a failed main control board.

You can run the dishwasher mechanically, but the cycle will complete without proper water heating. This means dishes will not be sanitized to safe temperatures and will likely come out wet with food residue. Running cycles repeatedly in this condition is not recommended, particularly for households with infants, elderly, or immunocompromised individuals who rely on sanitization.

Not always. The heating element is one of the most common causes, but a low water fill level, a failed thermistor, or a faulty main control board can each produce F97. Testing in order, starting with water level and then the element, keeps you from replacing parts unnecessarily. The thermistor and control board should only be replaced after the element and fill system have been ruled out.

Start by confirming the dishwasher fills to the correct water level, which should cover the bottom of the tub. If fill level is normal, test the heating element for continuity with a multimeter. A reading of OL or infinite resistance means the element is open and needs replacement. If the element tests good, check the thermistor resistance against the spec in your service manual. Replace any component that tests out of range, and test the main control board last.

A replacement heating element typically costs between $20 and $60 for the part, and a DIY replacement on most GE models takes one to two hours with basic tools. A thermistor is usually $15 to $40. If the main control board is the cause, parts alone can run $80 to $200 or more. Adding professional labor, expect $150 to $350 total depending on the component replaced and your local labor rates.