GE Washer, Dryer Error Code 28

Error code 28 means the control board detected an invalid position signal from one or more of the options knobs while a cycle was running. The board expects each knob to be at a clearly defined setting, and when the feedback falls outside a recognized value, it triggers this fault. The first step is to check that all options knobs are turned to a firm, defined position and then restart the cycle.

A reset may temporarily clear the code, but if the underlying cause is not corrected, the fault will return once a cycle starts and the control board reads the invalid knob position again. Correct the knob position or address any faulty hardware before relying on a reset as a fix.

If the fix is simply repositioning the knobs, there is no parts cost involved. Replacing a damaged knob is typically a low-cost repair, generally in the range of $10 to $40 for the part. A faulty rotary switch or encoder replacement can range from $20 to $80 or more depending on the model, and professional labor for wiring or control board diagnosis can add $75 to $200 or more to the total cost.

Start by turning all options knobs to a clear, valid position, making sure each one clicks into a defined detent. If the code returns, inspect each knob for physical damage such as cracks or a loose fit on the shaft. If the knobs appear fine, check the wiring harness connections at the knob assembly for loose or corroded terminals. A persistently faulty rotary switch or encoder will need to be replaced to resolve the error.

Error code 28 is primarily a control input fault and does not directly indicate a hazardous condition. However, running a cycle with an unrecognized options setting means the appliance may not operate with the intended parameters. It is best to resolve the fault before continuing regular use.