GE Dishwasher Error Code Boost

The Boost error on a GE dishwasher signals a thermistor fault, meaning the control board has detected either a short circuit or an open circuit at the temperature sensor. The thermistor monitors water temperature throughout the wash and dry cycles, and when its resistance reading falls outside the expected range, the control board triggers this code. The dishwasher will typically stop operating normally until the fault is resolved.

It is not recommended to continue using the dishwasher while the Boost error is active. The thermistor controls temperature monitoring during wash and dry cycles, and without accurate readings the dishwasher cannot properly regulate water temperature. Running the unit in this state could result in poor cleaning performance or, in some cases, overheating.

If the thermistor itself needs replacement, parts typically cost in the range of $15 to $50 depending on the specific model. If the control board is at fault, parts costs are generally in the range of $100 to $250 or more. Adding professional labor for diagnosis and repair can bring the total to anywhere from $100 to $350 or higher, depending on the technician and the parts required.

A knowledgeable DIYer with a multimeter can diagnose this fault by testing the thermistor resistance and checking wiring harness continuity. If the issue is a loose connector or a visibly damaged wire, the repair may be straightforward. Replacing the thermistor itself is also a manageable repair, but if the control board is found to be faulty, that replacement is more involved and may warrant professional service.

A reset may temporarily clear the error code, but if the underlying thermistor fault still exists, the Boost code will return once the control board runs its diagnostic checks again. A reset is useful for confirming whether the fault is intermittent, but it is not a substitute for diagnosing and repairing the actual cause.