How do I clear or fix an E4 error code

"GE Profile Tri Temperature Water dispenser E4 error code from your manual states:

Dispenser has experienced a sensor failure.

Unplug for 24 hours and let control to reset.

Re plug the unit in and repeat start up and operation adjustments.

Repeat if required. (( however, some failures may be permanent)).

Could be a faulty board/ sensor issue inside unit, have a good repair tech, have a look, diagnose and estimate repair. Good luck

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We just installed a garbage disposal. There is a knockout plug on the body of the garbage disposal that the dishwasher drain line attaches to. We’ve had this problem before and a plumber told us about it. This time, we forgot to knock out the plug and it caused our dishwasher to send a error code of E-4. Once I knocked out the plug and reconnected the drain hose to the garbage disposal the dishwasher code remained on. At this point the only thing we’ve seen we can do now is disconnect the power to the dishwasher to reset the code. So far no luck but we will wait a full 24 hours. This is a new dishwasher. I would be very surprised if it failed one month into use.