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MU3250W Samsung Microwave - Overview

Sections of the MU3250W

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High-Voltage Diode – Part Number: DE91-70063D
High-Voltage Diode
★★★★★
★★★★★
(4)
PartSelect #: PS4235633
Manufacturer #: DE91-70063D
This high-voltage diode is designed for use within various makes and models of microwaves and is a genuine OEM part that converts alternating current (AC) into direct current (DC). If you notice your ...
$33.69
  In Stock
Order now and your part arrives by Apr 10
Micro Switch – Part Number: 3405-001033
Micro Switch
★★★★★
★★★★★
(1)
PartSelect #: PS4131191
Manufacturer #: 3405-001033
$30.53
  In Stock
Order now and your part arrives by Apr 10
Glass Cooking Tray – Part Number: WB49X687
Glass Cooking Tray
PartSelect #: PS250256
Manufacturer #: WB49X687
  No Longer Available
Button Spring – Part Number: DE61-70076A
Button Spring
PartSelect #: PS4227643
Manufacturer #: DE61-70076A
$27.36
  In Stock
Order now and your part arrives by Apr 10
Screw – Part Number: 6002-000630
Screw
PartSelect #: PS4133229
Manufacturer #: 6002-000630
$6.40
  In Stock
Order now and your part arrives by Apr 10
Incandescent Lamp – Part Number: 4713-001102
Incandescent Lamp
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(2)
PartSelect #: PS4132144
Manufacturer #: 4713-001102
$32.63
  In Stock
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Self-Tapping Screw – Part Number: DE60-10082I
Self-Tapping Screw
PartSelect #: PS4226648
Manufacturer #: DE60-10082I
$23.60
  In Stock
Order now and your part arrives by Apr 10
Thermostat Assembly – Part Number: DE47-20008A
Thermostat Assembly
PartSelect #: PS4226405
Manufacturer #: DE47-20008A
$38.96
  In Stock
Order now and your part arrives by Apr 10
TRANS L.V;-,120V,60HZ,AC – Part Number: DE26-00037A
TRANS L.V;-,120V,60HZ,AC
PartSelect #: PS4223466
Manufacturer #: DE26-00037A
  No Longer Available
FOOT;-,PP(A353),MW5630T, – Part Number: DE61-40017A
FOOT;-,PP(A353),MW5630T,
PartSelect #: PS4227340
Manufacturer #: DE61-40017A
$6.40
  Special Order
Tapping Screw – Part Number: DE60-10080A
Tapping Screw
PartSelect #: PS4226640
Manufacturer #: DE60-10080A
$6.40
  Special Order
HEADER-BOARD TO CABLE;BO – Part Number: 3711-004143
HEADER-BOARD TO CABLE;BO
PartSelect #: PS4131573
Manufacturer #: 3711-004143
$6.40
  Special Order

Questions And Answers for MU3250W

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Common Symptoms of the MU3250W

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No heat
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Won’t turn on
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Keep searches simple. Use keywords, e.g. "leaking", "pump", "broken" or "fit".
Buzzing noise, no heating of food
Removed control panel, discharged HV capacitor. Removed old diode, tested to confirm failure. Replaced part. Other than the removal of the panel swapping the part was almost as easy as replacing a light bulb.
Parts Used:
High-Voltage Diode
  • Ted from Hudson, NH
  • Difficulty Level:
    Easy
  • Total Repair Time:
    30 - 60 mins
  • Tools:
    Pliers, Screw drivers
22 of 32 people found this instruction helpful.
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Microwave stopped working - would not heat up
I removed the outer cover and exposed the inner workings. I watched a video on partselect.com to show how to remove and replace the Diode. I followed the instructions and it was very easy to replace.

Unfortunately, the diode was only part of the issue. I ended up replacing the High Voltage capacitor and Magnetron also. Those were a little more complicated but still easy to do.

Now the Microwave works just like new! Cost me less than $100 for all parts.
Parts Used:
High-Voltage Diode
  • louis from PARRISH, FL
  • Difficulty Level:
    Easy
  • Total Repair Time:
    1- 2 hours
  • Tools:
    Pliers, Screw drivers
11 of 19 people found this instruction helpful.
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Appears to work, but food not heated
The high voltage tired was shorted. I replaced it with a new one, but that did not solve the problem.

You can test the high voltage tired with a voltmeter and a 9 V battery. Search Search for it on YouTube.

You can also test the high voltage capacitor, the high-voltage transformer, and the magnetron with a multi meter. Search for the procedures on YouTube.

I tested all these high-voltage components with a low-voltage multi meter, and they all checked out OK (after replacing the diode). However the microwave still did not heat food.

When working on a microwave it is important to unplug it and also discharge the high voltage capacitor. The capacitor has a 10 megaohm resister to automatically discharge itself, but it may have failed – – so discharge it manually.

In the end I ordered a new microwave.
Parts Used:
High-Voltage Diode
  • Joel from CAMBRIDGE, MA
  • Difficulty Level:
    Difficult
  • Total Repair Time:
    1- 2 hours
20 of 47 people found this instruction helpful.
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