Brand:Whirlpool
Model Number:WOC97EC0HZ02
Main Symptom:Main display no longer provides the option to turn on the microwave or oven
What happens & when: After restoring power, the main display illuminates and is interactive; however, there is no longer an option to turn on the microwave or the oven
Error Code (if any):Magnetron error was seen once or twice, but not any longer.
Parts or tests already tried:Unplugging the main display panel caused the microwave cook time choices to be displayed again, but they disappeared before I could put a cup of water in the microwave to test.
Photos / video link:
Just bought the house. Microwave “worked,” but took a very long time to heat anything up. No unusual noised were heard. “Magnetron” was displayed once or twice, briefly, but I was unable to capture the error code. Now, main display is not displaying error code or providing any options to run either the microwave or the oven. I have on hand a replacement magnetron and inverter board, and have 2 questions: Is magnetron and/or inverter board failure the most likely problem? And, if so, can someone point me to step-by-step instructions for replacing these 2 parts? (I have the oven out of the cabinet already, and can see both parts, but there are a lot of things that have to be removed to access the magnetron and inverter board. I want to do this correctly.) Thanks!
A magnetron or inverter failure should not cause the control panel to lose the ability to start the oven section, normally, but if the inverter board has failed it may be dragging on the system and confusing things. So I’d start by replacing those.
The fact it was giving the Magnetron error is somewhat concerning, but these do take longer to heat than most countertop or over-the-range microwaves because they are not as powerful, 900w instead of the average 1100 watt. When you do go about replacing the magnetron and inverter it should always be both of them at the same time, if one is bad then both are on these.
I’m attaching the service manual for this model, it goes over component access starting on page 4-1, 4-5 and 4-6 talk about the magnetron and inverter. I had to split it into 2 parts because of file limits.
If the display is still giving you problems after replacing those, let me know.
w11174422 Part 1.pdf (2.6 MB)
w11174422 Part 2.pdf (8.1 MB)
Rory, thank you for your reply–that is exactly what I asked for (and needed)!
I replaced both the magnetron and inverter board last night, and (unfortunately) there is zero change in the display status. (Both removed parts looked brand new to me with no obvious failures.)
But before I replaced those 2 parts, I tried obtaining the diagnostic codes; I was unable to enter the Diagnotics mode. I tried both ways. With Option A (HOME>FAVORITES>LIGHT sequence 3 times in a row, for a total of 9 button presses), I hear a “beep” on each of the first 8 button presses, but the ninth (and final) button press does not beep. With Option B (through the “Tools” button), pressing it provides only a pop up window explaining what it is for, but does not let me access its functions.
What do you recommend as the next step?
Thanks!
I suspect that the control panel is having a logic issue, but if you try Option B are you pressing and holding the Diagnostics button? It can take up to 1 minute of holding that to get it to the next step.
If the control panel is still being uncooperative you are looking at replacing the control panel W11428588.
https://www.appliancepartspros.com/whirlpool-console-w11428588-ap6983232.html
Hello again, Rory. To answer your question, I can’t get TO the Diagnostics button. The Settings button (which I referred to as the “Tools” button in my previous post) does not allow me to advance to the Diagnostics button–it does not advance at all no matter how many times I push it, or how long I push and hold it.
I have verified continuity per Page 2-17, Step 2, between the Copernicus ACU and the User Interface Board ends of the “Y”- shaped wiring harness. (I have not yet verified continuity to the Microwave ACU.) I have also verified 14 vdc at the User Interface Board from P1-4 to P1-1. (I didn’t see the need to verify 14 vdc at the Copernicus ACU from P1-2 TO P1-5 because the voltage is reaching the User Interface Board.)
Is there anything else I can check to provide a clear diagnosis of which part has failed? I have already replaced 2 parts with no improvement, and the control panel is a very expensive non-returnable part. Thank you.
Yup, that’s going to be an issue with the console/control panel part # I referenced in my previous post.
Hello Rory, I replaced the console/control panel per your recommendation, and lo and behold, there was a significant change–I can now access the microwave and oven functions, as well as the diagnostic menu–yay! I decided to test the microwave function first (with a cup of water inside), and got the F1E6 MICROWAVE MAGNETRON error on every attempt. (Remember, I just replaced the magnetron and inverter board.) I consulted the repair manual you sent me (specifically Page 2-10), and visually inspected the 4903 relay and its connections on the Microwave ACU. I also checked for proper operation of the Primary Interlock Switch with continuity checks. All seemed okay to me, so everything checks out good until Step 7, where the F1E6 error code is triggered.
Interestingly, while the microwave was running, I could hear a distinct and repetitive “click” sound coming from the area of the 4903 relay every few seconds. A voltage check on the switched side if this relay (the side that sends power to the Inverter board) showed +/-122 VAC for a few seconds, then zero volts; then the clicking sound followed by a rapid return to +/- 122 VAC for a few seconds, the back to zero volts. This cycle repeated itself until the F1E6 error code was displayed.
I did not test the oven function.
My guess is a replacement Microwave ACU board is the next step. What are your thoughts?
Thanks.
As long as when you replaced the magnetron and inverter it was with the unit powered off and did both of them at the same time then I agree, it sounds like the magnetron and inverter failed and took out the Microwave ACU W11325789 when they did.
If at any point you applied power to the unit while one of the old components (magnetron or inverter) and one of the new components (magnetron or inverter) were connected to the harness then the new components are now bad. I’m not trying to harp on that, I’ve just seen it happen a great many times to techs in the field that replaced one and powered the unit up to test then ended up having to replace both again. I don’t want you to buy a control board when it isn’t the issue. If you swapped both of them out at the exact same time while everything was powered off then you’re fine.
https://www.appliancepartspros.com/whirlpool-cntrl-elec-w11325789-ap6872128.html
Rory, yes, I swapped both of them (Magnetron and inverter board) out at the exact same time while everything was powered off.
Thanks for the link (and p/n) to the Microwave ACU W11325789. That was not easy for me to determine using the manufacturer’s schematic or parts description.