Robert H Wellesley , MA May 20, 2016 Appliance: Model 790.78852600 F30 error code (usually just the temperature probe but not this time) With the able and generous assistance of AppliancePartsPros in the form of their Joe Martin, (a very competent, knowledgeable and patient man) we were able to troubleshoot to eliminate all less costly possibilities for fixing the issue. When the new range controller arrived it was a simple matter to remove the old and replace with the new, 4 screws and one 15-pin plug. The new unit solved the F30 issue. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes