If you’ve ever used a microwave, then you know that the waveguide cover is an essential part of the appliance. But what happens if you accidentally lose or break it? Can you still use the microwave without it?

In this blog post, we’ll take a look at what the waveguide cover does and find out if it’s possible to use a microwave without it. Stay tuned!

Can You Use A Microwave Without The Waveguide Cover?

You can use a waveguide without a waveguide cover. But it can bring you a significant disadvantage hampering magnetrons and other internal circuits. Continuous use of waveguide without waveguide cover may render the magnetron beyond repairs. 

So, if you compare between waveguide cover and magnetron, it makes so much sense that we should use a microwave waveguide cover. Also, if the surface is damaged, it should be replaced as early as possible. The price of the magnetron is more than ten times that of a waveguide cover. So, the decision is yours. 

Can You Use A Microwave Without The Waveguide Cover

What is Waveguide?

A waveguide is mainly a metallic tube designed to confine, channel, and detect electromagnetic waves. In the microwave oven, the waveguide explicitly transfers the power from the magnetron to the cooking chamber. So, it is the power supply line in the microwave oven. 

Do All The Microwaves Have A Waveguide Cover? 

Most of the microwave ovens have waveguide covers. Waveguide cover is either a plastic or mica cover. It sometimes resembles a piece of cardboard. The location of the waveguide cover is the top of the cavity or one side of the walls. A waveguide cover acts as a barrier and is used for our safety. 

Most of the waveguide cover is replaceable. But some microwave oven waveguide covers can’t be replaced. 

What Is A Waveguide Cover Made Of? 

A typical waveguide is made of brass, copper, silver, aluminum, or any metal with low bulk resistibility. 

And the metal with poor conductivity is superior to making a waveguide cover. So, plastic can be the best material for a waveguide cover. 

Where Is The Waveguide Cover Located? 

All the microwave oven’s cooking chamber is not in the center. So, if you always search it in the center, you may not find it.

If you look into the inner wall of the oven chamber when you open the oven door, you will see the waveguide on the same side as the control panel. The thin sheet will look like plastic or a thin piece of cardboard.

Importance Of A Microwave Waveguide Cover 

Earlier, we have known that waveguide cover depends on us. We can either use it or not use it because it doesn’t add up to the operations of the microwave. So, without it, the microwave will function fully. But if we want our microwave ovens to work to the fullest without causing any damage, we should use a waveguide cover. So, indeed, the waveguide cover has some functional characteristics. 

The primary two functions of waveguide cover are- 

  • Protect the magnetron and other electronic compartments.
  • Guide waves from the magnetron.

Protect the magnetron and other electronic compartments.

The waveguide cover protects the waveguide cavity from food and moisture and evenly distributes the microwave for proper heat. The humidity of food may cause electric sparkles. The waveguide cover protects the magnetron and other electronic compartments of the microwave from flashbacks caused by cooking. So the waveguide cover has to stop any moisture or food particles that try to find their way into the internal electronic components of the microwave.

Without waveguide cover, splashes of food may enter into internal electronic compartments. With time, the inner boxes get damaged severely, and the microwave stops working completely. 

The waveguide cover also protects the passage of microwave radiation from the magnetron.

Guide waves from magnetrons.

After the magnetron produces the microwave radiation and transits through the waveguide, the waveguide cover guides the radiation into the microwave. In short, it helps convey microwave radiation from the magnetron to the inner cavity of the microwave.

How Do Waveguide Covers Get Damaged?

If you use a waveguide cover properly, it may last longer. But if you don’t handle it with care, it may damage often. The waveguide cover is brittle. So, if you place the food dishes roughly in the oven, they may break down into pieces. 

You can use your microwave without a waveguide, but the steam and vaporized food particles collect on the oven’s electronic components when the waveguide is damaged. The waveguide’s primary function is to protect the stove from steam, and vaporized food particles accumulate on the oven’s inner electronic components. 

If this does happen, the circuit boards in the microwave will short and corrode. If the circuit boards are short, your microwave oven will immediately stop functioning or lose power over time.

Can A Waveguide Cover Be Replaced? 

The microwave’s waveguide cover doesn’t last forever. It weakens with time as splashed moisture and food particles settle on it. They can also get cracked, burnt, or chipped. And it’s always advisable to replace it if either of these contacts happens with your waveguide cover.

So, yes. A waveguide cover can be replaced.

Replacement Of Waveguide Cover: Step By Step.

If you use a microwave frequently, you should change your waveguide cover regularly without waiting for its damage. For smooth use of a microwave oven, it is necessary to replace coverings. 

For replacing the cover, you need to purchase the correct waveguide cover. Waveguide covers vary from model to model. So, you can find one by your model number. Otherwise, it won’t fit in your microwave oven. Then comes the steps of replacing. Most of the people call a technician to replace it properly. However, it depends on one’s personal choice.

Few steps can be followed while replacing a waveguide cover.

  1. First, disconnect your microwaves from the mains before working on them.
  2. Do well discharge the capacitor as the microwave has lethal voltage.
  3. Start by first removing the turntable and the roller rink. Unscrew any screw you find on the waveguide cover holding it to the inner cavity of the microwave.
  4. Then easily remove the old cover.
  5. After removing the old cover, do well to clean the edges of where the waveguide cover was if you find any dirt there.
  6. After all that has been done, you pick your newly purchased waveguide cover and slide it into where you removed the old one from.
  7. Screw the cover to the walls of the inner part of your microwave.
  8. Now put back the microwave’s roller ring and turntable.
  9. And after all that, it’s advisable to clean the microwave.
  10. Fill a jug with about 300 ml of water. Squeeze half of an average-sized lemon into the water, and place your jar into the microwave. Turn on the microwave for about 5 minutes. And the time has been exhausted, you take out your jug and wipe away the condensation with a clean and soft cloth.

Now, you’re fully set. The cleaning method isn’t part of the replacement process, but it will enhance the productivity of your microwave oven. So, that’s how a waveguide cover can be replaced and is ready to work most whole.

Can I Replace A Waveguide Cover By Myself? 

An owner can replace a waveguide cover. Slide in the new waveguide cover and replace the holding screw if fitted. You can now also place the turntable and roller ring back in your microwave.

Congratulations – you have now replaced the waveguide cover on your microwave. You can now get back on with life with one less worry on your mind! 

But you can replace it with a technician too. Don’t worry about the replacement process. Trust me, and it is the most uncomplicated process.

If you still don’t understand here is a video for you.

Can I Make My Waveguide Cover In My House? 

You can make your waveguide cover too. For making a new waveguide cover, you need some materials and tools. You can also find the materials easily from any appliance repair shop. For buying the perfect fabric, you can go to the shop with your old waveguide cover. 

While buying the materials, make sure that the dimensions are at least an inch larger than your old damaged one.

Process of making a waveguide cover.

  • Place your purchased waveguide cover material on a clean workbench or table, and place the old waveguide cover on it.
  • Trace out the old cover on the new, more extensive purchased material with a razor knife.
  • Cut out the overlapping parts of the material per the dimensions of the old damaged one.
  • After cutting the dimension, find yourself a screwdriver.
  • Use the screwdriver to make holes on the waveguide per the holes inside the microwave where the waveguide cover will be positioned.

Hurrah! Your waveguide cover is ready to be placed. Do well to take the necessary measurements before cutting anything out to avoid rendering the material useless or wasteful.

Read More: Can You Break A Microwave By Running It Empty?

Prices Of A Waveguide Cover 

Waveguide cover prices vary from model to model. Sometimes many companies sell only mica sheets. You need to cut the sheet according to your need.

Amongst many companies and models, here are some prices of waveguide covers so that you can assume the accurate cost. 

ModelPrice
VINFANY 10 PCS Waveguide Cover Universal Mica Sheet for All Microwave Oven Cut to Size 150X120mm$15.99 (Gray)$8.98 (10a)
Frigidaire 5304462314 Microwave Waveguide Cover (15 PCS)$33.15

2PCS Waveguide Cover for Frigidaire 5304462314
$19
Frigidaire 5304464061 Microwave Waveguide Cover
$7.31

*Source: Amazon.com

Conclusion.

So, in conclusion, we can say that the microwave waveguide cover doesn’t affect the functioning of the microwave. Hence, the microwave can be used anytime without the waveguide cover. The essence of the waveguide cover in the microwave is to protect the magnetron from getting spilt with food particles. And it also protects other internal electronic components from the reach of microwave radiation and splashbacks of food. These are the things that cause the internal electrical components to corrode and harm the functioning of the microwave.

We have learned nearly A to Z about waveguide cover. So, next time you have thoughts like, can you use a microwave without a waveguide cover, you should think like you should use a microwave without a waveguide cover. Let’s use the microwave safely and lead a relaxed life!

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