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MW73EXSV Samsung Microwave - Overview

Diagrams for MW73EXSV

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High-Voltage Diode – Part Number: DE91-70063D
$28.26
In Stock
High-Voltage Diode
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(4)
Part #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 microwave turns on and starts but does not heat anything, this diode is likely responsible. You can check the continuity of the diode with a multimeter before outright replacing it, but it is important to remember that doing any repairs on a microwave and dealing with sensitive electrical components should be done carefully and with the appropriate precautions to avoid any hazards. To replace the high-voltage diode in your microwave, disconnect it from power and allow it to discharge. Using the appropriate screwdrivers, gain access to the control panel of the microwave. Using an insulated screwdriver, release any electrical charge in the capacitor by touching it across the terminals. Then you can remove any hardware securing the diode, including the harness connecting it to the capacitor, which may be easiest done with pliers. Connect the new diode to the capacitor terminal and the securing bracket, and then reassemble your microwave before connecting it to power again.
Button Spring – Part Number: DE61-70076A
$28.33
In Stock
Button Spring
Part #DE61-70076A
Synchronous Motor – Part Number: DE31-10154D
$56.94
In Stock
Synchronous Motor
Part #DE31-10154D
Screw – Part Number: 6002-000630
$6.40
In Stock
Screw
Part #6002-000630
Door Switch Lever – Part Number: DE66-00088B
$6.55
In Stock
Door Switch Lever
Part #DE66-00088B
This genuine microwave door switch lever is an essential component of the door interlock system, helping detect when the microwave door is properly closed so the appliance can operate safely. Designed to engage the door switch mechanism during opening and closing, it helps ensure the microwave starts only when the door is securely latched. Replacing a worn, cracked, or damaged lever can help resolve issues such as a microwave that will not start, intermittent operation, or failure to recognize that the door is closed. Made from durable plastic for reliable performance, this OEM replacement part helps restore proper door switch function and safe appliance operation. Installation typically involves disconnecting power, removing the outer cabinet or control panel as required to access the door switch housing, replacing the damaged lever, and reassembling the unit before testing operation. This is just the lever, not the switch itself.
Flange Nut – Part Number: DE60-30016A
$6.55
In Stock
Flange Nut
Part #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 surface, and can also eliminate the need for a separate washer. This flange nut also features a ribbed surface on the flat side, so it can bite into the mating surface to create a more secure connection. Since this nut is not used for one specific purpose, its use is versatile, and it can be used in a variety of applications. This nut is a genuine OEM part made of high-quality metal, and a wrench is the only tool you will need to install or remove this flange nut.
Door Lever – Part Number: DE66-90013A
$31.58
On Order
Door Lever
Part #DE66-90013A
Self-Tapping Screw – Part Number: DE60-10082I
$24.43
In Stock
Self-Tapping Screw
Part #DE60-10082I
Latch Body – Part Number: DE72-00138D
No Longer Available
Latch Body
Part #DE72-00138D
Tray – Part Number: DE74-00027A
$57.15
In Stock
Tray
Part #DE74-00027A
Guide Roller – Part Number: DE97-00193B
$43.58
On Order
Guide Roller
Part #DE97-00193B
Key Door – Part Number: DE64-40006F
$31.58
Special Order
Key Door
Part #DE64-40006F

Common Symptoms of the MW73EXSV

How this model fails, and the parts that fix it.

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Buzzing noise, no heating of food
22 of 35 people found this instruction helpful.
  • Ted from Hudson, NH
  • Easy
  • 30 - 60 mins
  • Pliers, Screw drivers
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.
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Microwave stopped working - would not heat up
11 of 21 people found this instruction helpful.
  • louis from PARRISH, FL
  • Easy
  • 1- 2 hours
  • Pliers, Screw drivers
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 w ere a little more complicated but still easy to do.

Now the Microwave works just like new! Cost me less than $100 for all parts.
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Appears to work, but food not heated
20 of 48 people found this instruction helpful.
  • Joel from CAMBRIDGE, MA
  • Difficult
  • 1- 2 hours
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 met er. 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.
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