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Mike Johnson Posted on Mar 21, 2008
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Any Whirlpool Microwave Techs out there...Please help a fellow tech

I am replacing the original HV transformer with a different HV transformer that I bought off ebay and I need help connecting the wires from the magnetron and HV capacitor to the HV transformer.

  • Anonymous Feb 27, 2009

    I have a sim problem I have a Jen Air JMC7000ADB from what I can see they used the same transformer in a whirlpool and Maytag but they have discontinued the transformer for all these models can any one help I need to replace with a like transformer but dont know what replacement would work I have a 1400W microwave or atleast thats what it says inside the microwave but every place I read about this microwave tells me its a 1000W Please tell me what transformer will replace this the number on my transformer is DW-N95AO-16TH the the part number that whirlpool and maytag used was 560012221

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Dave

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  • Posted on May 03, 2016
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If the old transformer still has continuity on all 3 windings, then you should be able to match up the wires with the old one based on the resistance of each one. However, if you do this, make sure you are getting similar readings on the new transformer vs. the old. If I was installing a non-exact replacement, I would put voltage on the primary using a variac set to a very low voltage. Then you can safely measure the high voltage and filiament winding voltages to see if they would be correct if 120 vac was applied to it.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/david_29ad5d1dd86564b0

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  • Posted on Mar 23, 2008
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Hi mike,

I’m sorry to tell you this but; I wouldn't recommend using a different transformer, even if it's the same size, it could cause serious damage. The HV transformer should only be replaced with the exact replacement part.

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1answer

My one year old microwave just stopped working. The light is on, but nothing else.

Sorry to read about your problem, I hope this helps you out.

here are some issues, but you still maybe under warranty.
  1. Blown fuse in HV transformer primary circuit or HV fuse (if used).
  2. Bad connections (particularly to magnetron filament).
  3. Open thermal protector or thermal fuse.
  4. Open HV capacitor, HV diode, HV transformer, or magnetron filament.
  5. Shorted HV diode, HV capacitor (will blow a fuse), or magnetron.
  6. Damaged protective VDR from filament to chassis (not commonly used).
  7. Defective HV relay (not commonly used).
Microwaves must be serviced by technicians due to the inherent dangers involved in repairing these appliances. Internal capacitors can retain a lethal electrical charge even though the unit is completely unplugged. A microwave radiation leakage test must be performed on the unit following any internal component repair.

I tried to help you. Please help me and Rate/Vote on my response. We take the time to answer your question's. take the time to rate us.Thanks and good luck

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Microwave activate but will not heat food all light and buttons work but will not heat up

Sorry to read about your problem, I hope this helps you out.

You can many different issue's
  1. Blown fuse in HV transformer primary circuit or HV fuse (if used).
  2. Bad connections (particularly to magnetron filament).
  3. Open thermal protector or thermal fuse.
  4. Open HV capacitor, HV diode, HV transformer, or magnetron filament.
  5. Shorted HV diode, HV capacitor (will blow a fuse), or magnetron.
  6. Damaged protective VDR from filament to chassis (not commonly used).
  7. Defective HV relay (not commonly used).
Microwaves must be serviced by technicians due to the inherent dangers involved in repairing these appliances. Internal capacitors can retain a lethal electrical charge even though the unit is completely unplugged. A microwave radiation leakage test must be performed on the unit following any internal component repair.

I tried to help you. Please help me and Rate/Vote on my response. We take the time to answer your question's. take the time to rate us.Thanks and good luck

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GE JVM1440 will not heat.

Sorry to read about your problem, I hope this helps you out.

No heat but otherwise normal operation.
Possible causes:
  1. Blown fuse in HV transformer primary circuit or HV fuse (if used).
  2. Bad connections (particularly to magnetron filament).
  3. Open thermal protector or thermal fuse.
  4. Open HV capacitor, HV diode, HV transformer, or magnetron filament.
  5. Shorted HV diode, HV capacitor (will blow a fuse), or magnetron.
  6. Damaged protective VDR from filament to chassis (not commonly used).
  7. Defective HV relay (not commonly used)
Microwaves must be serviced by technicians due to the inherent dangers involved in repairing these appliances. Internal capacitors can retain a lethal electrical charge even though the unit is completely unplugged. A microwave radiation leakage test must be performed on the unit following any internal component repair.

I tried to help you. Please help me and Rate/Vote on my response. We take the time to answer your question. take the time to rate us.Thanks and good luck

4 Thumbs - Very Helpful
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Just replaced the magnetron in my Panasonic NN-S543BFR. I still don't get any heat from my oven. Everything works as set but still no heat in oven. Need suggestions on repairs.

When you say "Everything works as set" do you mean the microwave appears to function properly, but then doesn't heat?

If the magnetron is new, then the magnetron must not be receiving the required high voltage (2000V or more) from the HV circuit. Make sure you've got 120V to the PRIMARY (don't attempt to measure secondary voltage of the HV transformer without special equipment) of the HV transformer. After that check the HV capacitor and diodes. If these components test OK, then either your HV transformer is bad or your new magnetron is faulty. My experience is that the problem is usually in control circuitry, preventing 120V to the HV transformer, or opens/shorts in the HV components (diodes and capacitors).
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Even though timer starts the microwave doesn't start cooking

read this post
Parts:
magnetron: W10131681
HV capacitor: 815124
HV diode: W10201950
HV transformer: 8171873

Of note: generic parts are cheaper and will work as well.
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It could be a magnetron sparks to the open metal inside the m/w cavity or some broken wire on high voltage side. It is not HV transformer (when burn create a lot of smoke and bad smell). Magnetron needs to be replace.

I’m happy to help further over the phone at https://www.6ya.com/expert/vitaliy_f406165329c75ede

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I have a JVM1860SF001 Microwave

drive for the turntable is quite easy to do, as for the transformer people have been killed trying to replace key components and if you seriously have no understanding of electrics and electronics then i'd pay the labour costs (its called high voltage for a reason) even with the oven off therecan be upto 3000v still within the oven and believe me it hurts when it shocks you, also with the transformer faulty it could have caused damage to the diode, mag and capacitor not always but sometimes and these are easier to check when changing hv transformer!!!!!
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Ge Spacemaker microwave jvm240 wv Micro hood combo.

sounds to me like the magnatron has shorted out. i don't know of a way to test them unless you have some high dollar equipment. a continuity test prob wont tell you anything. what reading did you get on the cap when you tested it?
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