GE Dryer Error Code 28

Error code 28 on a GE dryer is an Options Knob Feedback Invalid fault. It means the control board detected an unrecognized knob position signal while a cycle was running. The most common causes are a knob left between settings, a loose wiring harness connector, or a harness that is pinched under the knob assembly. Correcting the knob position and reseating the harness resolves the fault in most cases.

A reset can clear the stored fault code, but if the underlying cause is not addressed the code will return as soon as another cycle is started and the knob position is again read as invalid. Before resetting, make sure the knobs are in valid positions and the harness is properly connected. A reset alone without correcting the root cause is only a temporary measure.

If the fix is simply reseating a harness connector or repositioning a knob, there is no parts cost involved. If the knob assembly or encoder needs replacement, parts typically range from around 20 dollars to 60 dollars depending on the model. A control board replacement is more expensive, generally falling in the range of 100 dollars to 250 dollars for parts, plus any applicable labor costs if a technician is needed.

Start by turning all options knobs to a firm, defined position and confirming each one clicks into place. Next, access the knob panel and check that the wiring harness is fully connected at both ends and is not routed beneath the knob assembly. If the fault persists after these steps, the knob encoder or the control board may need to be tested and potentially replaced.

Error code 28 is a control and feedback issue rather than a heating or mechanical safety fault, so it does not present an immediate safety hazard. However, because the dryer may interrupt or not complete cycles properly when this code is active, it is best to diagnose and resolve the fault before relying on the appliance for regular use.