Question about Jenn-Air JMC7000 Microwave Oven
I have a Jenn-Air JMC7000ADW Microwave / Oven in wall combo that is 8 years old, Blows circuit breaker when you push the open button at times, have replaced Diode, still blows breaker (at times)
I've had this problem twice with our microwave. The hint to where the problem lies is that the breaker blows when you open the door at times. Inside the microwave are three microswitches; primary and secondary interlock micro switches and an Interlock Monitor switch. The switches are supposed to shut down the microwave if it is running and the door is opened. But, I've found the upper primary switch can stick internal at times and when the door is opened the stuck switch will, because of the way it is wired as a safety switch, cause either the fuse or possibly the main circuit breaker for the oven to pop. The reason the stuck switch blows the breaker or fuse is when the door is opened the interlock switch will cause the neutral wire from the AC power to be applied to the Upper Primary Interlock switch which normally should be open when the door is opened, but if the switch is intermittent or the contacts weld themselves shut the neutral line is connected direct to the "hot" side of the power line through the fuse and thermostat. The first time my microwave failed the switch had melted the contacts together inside the switch and the second time the switch became intermittent and would blow the breaker to the over ever so often. I suspected the switch the second time this happened and utilizing an ohm meter I checked the switch several times by opening and closing the door and once in a while it would remain closed instead of opening when the door was opened. Of course while trouble shooting the power cord to the microwave must be disconnected and use all safety precautions when working around the high voltage areas inside the microwave. I wrote Jenn-Air about the bad switch and the way it is wired into the circuit, but never received any acknowledgement. I suspect these microswitches are under rated for the amount of current that passes through the switch, thus they overheat and eventually arc the contacts together. I hope this helps explain the intermittent problem and could explain many of the intermittent blown fuse problems I see in these internet help sessions
Posted on Oct 11, 2008
Only fuze are replaced
Posted on May 09, 2008
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Here is a tip that will help you to figure out what is wrong with your Microwave Oven....
Basic Microwave Oven Troubleshooting Tips
Feb 19, 2011 | Jenn-Air JMC7000 Microwave Oven
Aug 07, 2009 | Jenn-Air M170 Microwave Oven
Mar 09, 2009 | Jenn-Air JMV8208A Microwave Oven
Nov 22, 2008 | Jenn-Air JMC7000 Microwave Oven
May 01, 2008 | Microwave Ovens
Jan 28, 2008 | Jenn-Air JMC7000 Microwave Oven
Dec 18, 2007 | Jenn-Air JMC7000 Microwave Oven
Dec 17, 2007 | Jenn-Air JMC7000 Microwave Oven
Nov 17, 2007 | Jenn-Air JMC7000 Microwave Oven
800 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: