Models > MW3550T

MW3550T Samsung Microwave - Overview

Sections of the MW3550T

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High Voltage Diode – Part Number: DE91-70063D
High Voltage Diode
★★★★★
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(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 ...
$29.87
  In Stock
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Flange Nut – Part Number: DE60-30016A
Flange Nut
PartSelect #: PS4226726
Manufacturer #: DE60-30016A
This flange nut is designed for use within various cooking appliances like ranges, microwaves and wall ovens. Flange nuts are typically used to evenly distribute pressure across its application surfac...
$4.67
  In Stock
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Tapping Screw – Part Number: DE60-10045A
Tapping Screw
PartSelect #: PS4226604
Manufacturer #: DE60-10045A
$29.87
  In Stock
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LAMP;125V,25W,(E-17,T-25 – Part Number: DE07-90012A
LAMP;125V,25W,(E-17,T-25
PartSelect #: PS4223092
Manufacturer #: DE07-90012A
$11.73
  Special Order
MOTOR GEARED;-,-,-,-,-,- – Part Number: DE31-10033A
MOTOR GEARED;-,-,-,-,-,-
PartSelect #: PS4223898
Manufacturer #: DE31-10033A
$97.10
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FUSE;NORMAL,BLO,3AB-3140 – Part Number: DE32-10026A
FUSE;NORMAL,BLO,3AB-3140
PartSelect #: PS4224089
Manufacturer #: DE32-10026A
$9.72
  Special Order
SCREW-TAPTYPE;-,-,STS,-, – Part Number: DE60-10061A
SCREW-TAPTYPE;-,-,STS,-,
PartSelect #: PS4226620
Manufacturer #: DE60-10061A
$4.19
  Special Order
NUT-FLANGE;-,MSWR10,P0.8 – Part Number: DE60-30015A
NUT-FLANGE;-,MSWR10,P0.8
PartSelect #: PS4226725
Manufacturer #: DE60-30015A
$4.19
  Special Order
PIN-FOOT;PP,0.5G,BBLK,-, – Part Number: DE60-60015A
PIN-FOOT;PP,0.5G,BBLK,-,
PartSelect #: PS4226760
Manufacturer #: DE60-60015A
$4.19
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FOOT;-,PP,BLK,9G,-,-,- – Part Number: DE61-40025A
FOOT;-,PP,BLK,9G,-,-,-
PartSelect #: PS4227344
Manufacturer #: DE61-40025A
$4.94
  Special Order
CLIP;-,POLYYOLFIN,-,POLY – Part Number: DE69-60020A
CLIP;-,POLYYOLFIN,-,POLY
PartSelect #: PS4233243
Manufacturer #: DE69-60020A
$4.19
  Special Order
Cooking Tray – Part Number: DE74-20037A
Cooking Tray
PartSelect #: PS4234978
Manufacturer #: DE74-20037A
$39.47
  In Stock
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Questions And Answers for MW3550T

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Common Symptoms of the MW3550T

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No heat
Fixed by
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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
8 of 12 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
11 of 24 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
4 of 10 people found this instruction helpful.
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