Frigidaire Dishwasher Error Code i70

The i70 code means the control board has detected a voltage reading from the NTC sensor that is outside the acceptable range of 0.04V to 4.7V for more than 10 seconds. The NTC sensor is part of the turbidity sensor assembly, which monitors water clarity and temperature. This fault indicates the sensor circuit is either open, shorted, or the sensor itself has failed.

Running the dishwasher while the i70 fault is active is not recommended. The turbidity sensor helps the control board regulate cycle performance, and operating without a functioning sensor may result in poor wash results or the dishwasher failing to complete cycles properly. It is best to resolve the fault before resuming normal use.

A reset may temporarily clear the i70 code, but the fault will return if the underlying cause has not been fixed. Because the code triggers after the sensor voltage is out of range for more than 10 seconds, the control board will detect the problem again as soon as the next cycle begins. A permanent fix requires addressing the sensor, wiring, or connector issue.

In many cases, yes. The primary fix is replacing the turbidity sensor, which is a relatively accessible component in most Frigidaire dishwasher models. Before replacing the sensor, check the wiring harness and connector terminals for damage or corrosion, as a wiring issue can sometimes be resolved without purchasing parts. If you are comfortable disconnecting appliance components and using a multimeter, this is a manageable DIY repair.

If the turbidity sensor is the cause, the part typically costs between $20 and $60 depending on the specific model. If you hire a technician, total repair costs including labor generally range from $100 to $200. If the control board turns out to be faulty, costs can be significantly higher, often between $150 and $350 for parts and labor combined.