Question about Northern Industrial Tools Air Tools & Compressors
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Posted on Jan 02, 2017
SOURCE: JMC7000ADW Blows circuit breaker
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
hi i have the same problem but with my simpson sirrico 350 with auto reverse anti tangle dryer ,i walked out after putting a load into the dryer to find the dryer had not dried the clothes and water was leaking from the front of the machine where the dials are,i left it a few days then tried to turn on but it triggers the circuit breaker (safety switch on my house meter box.can you please help me with any suggestions on how to fix the machine as i only bought this approx 2 -3 years ago thankyou sharon
Posted on Jan 08, 2009
Most likely you have a bad or weak circuit breaker. Consult an electrician for breaker change out. Make sure that it isn't hooked up with a GFI plug. They will not work on a GFI.
Posted on Apr 01, 2009
SOURCE: Blows Circuit Breaker
Check your heating element..
Dishwasher Problems The Heating Element not Working
Asker's Testimonial " expanation very clear. will give it a go and see how simple it was. thanks Ronnie " - ronnieshomes
Posted on Aug 03, 2010
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