Kenmore Microwave Not Heating – What To Do If Your Microwave Doesn’t Heat

Microwaves are the most common appliance in many homes. If you own a Kenmore microwave, you must know how to troubleshoot and fix problems with your microwave should they arise. This article will tell you what to do if the Kenmore microwave not heating.

Microwaves are an everyday kitchen appliance that people take for granted. Microwaves are one of those household items that we all take for granted.  Microwaves do a lot more than just heat up leftovers and nuke the popcorn, as many people may think. The truth is, microwaves can be very useful – but only if they work! That’s why it pays to know what to do when your Kenmore microwave doesn’t heat. Let’s explore the top 10 reasons why Kenmore microwaves don’t work.

Do you have a Kenmore microwave that’s not heating?

If your Kenmore microwave is not heating, it could be one of many things. It may just need to be reset or the power cord needs to be plugged in correctly. Or maybe there are some other issues with the electrical outlet or wiring in your home. Whatever the issue might be, we’re here to help!

We’ll send someone out right away and fix any problems for you so you can get back to cooking up delicious food for your family without worrying about whether or not it will heat up properly. You deserve better than an appliance that doesn’t work when you need it most! 

What Are Kenmore Microwaves?

Microwaves are one of the most popular small appliances in America. If you’ve never shopped for a microwave, then it might be difficult to know what to look for. But don’t worry you can find the perfect one in no time with these few tips! First off, make sure that your prospective purchase has at least 1 cubic foot of interior space (about 12 inches deep). This is enough room to heat about two plates or dishes at once. Next, take note of how powerful the microwaves are. Depending on how often you cook, you might want a 700 or 800-watt model. You can also find models that offer a higher wattage for faster heating speeds and lower wattages for more delicate items like hot chocolate.

It’s estimated that more than 85% of American households have at least one microwave oven and for good reason. Microwaves can be used to defrost food or heat leftovers quickly, saving you time and money. They also save energy by cooking with less power than an electric stovetop or oven would use. Microwaves make it possible to pop popcorn without oil or butter (saving calories) and cook vegetables without added fat (also reducing your risk of heart disease). But if you don’t know how to choose a microwave, it might not live up to your expectations; some models take too long to cook certain foods while others don’t cook them correctly.

What’s A Kenmore Microwave Made Out Of?

kenmore microwave not heating

Kenmore microwaves are a brand of microwaves made by Sears. The Kenmore company also makes a variety of other home appliances including washers, dryers, dishwashers, and ovens.

The first Kenmore Microwave was built in 1983. This microwave was the biggest that could fit into a kitchen cabinet at the time. In 1986, Kenmore introduced a microwave for less than $100.

In 1993, Sears introduced its Craftsman line of kitchen appliances which included microwaves under the Kenmore brand name. The current model is the 147411, which was released in 2008. It is considered to be one of the most reliable microwaves on the market with features like Quick Defrost and Sensor Reheat.

In 2010, Sears released the Kenmore Elite Microwave which offers a variety of advanced features not typically found on microwaves in its price range. The most notable feature is Precise Cooking which allows you to monitor your food’s cooking progress without having to open the door.

Kenmore microwaves are made from a variety of materials. The more expensive, high-end models come with stainless steel or ceramic interiors while more cost-efficient models have a metal interior.

How Does A Microwave Work?

A microwave oven heats food by sending waves at a frequency of about 2.45 gigahertz. The waves’ changing electric and magnetic fields create currents that produce heat as they pass through the food.

Microwaves are used to cook, reheat, or defrost food. They can also be used for other purposes such as melting butter on popcorn, reheating coffee, and cooking quick-cooking foods like soups and stews. When microwaves cook food, they usually do a good job of both heating the inside and the outside of food without overcooking the outside before the inside is done. This gives people more room for error than many other cooking methods do.

A microwave is an electromagnetic radiation oven that heats food by causing water molecules in the food to rotate rapidly and produce heat. A microwave typically operates with a power of 800-1800 watts, depending on its frequency.

Common Reasons For Your Kenmore Microwave Not Heating

Microwaves are a great way to heat food, but sometimes they just don’t work. Sometimes the microwave doesn’t have enough power to turn on, or it takes too long for your food to come out hot. Do you ever get frustrated with your Kenmore microwave because it just doesn’t seem to heat up? Maybe you’re not sure why. Well, don’t worry! Whatever the case may be, there are so many reasons that the Kenmore might not be heating properly and we’ll cover them all here.

Burnt Diode

A microwave oven contains a magnetron to generate microwaves. When microwaves are created, they cause molecules in the food to rotate or vibrate which creates heat. Microwave ovens use this heat to cook the food. Microwave energy can also maintain food at medium-to-high heat for long periods without drying out the food.

A burnt diode of microwaves is often caused by a very sharp turn on a microwave. In this case, the magnetron will not get enough time to cool off, and it will overheat from the excessive current. Burnt diodes can also be caused by standing too close to the microwave while something is cooking. This causes an arc discharge that damages the diode.

Sometimes, if the gasket in the door is too tight or too loose, it will also cause a burnt diode.

The silicon substrate is heated and then placed inside a metal frame. This frame, which is designed to shadow the device from the sun and other heat sources, is filled with a dielectric and placed within a metal housing. A transformer provides power to the microwave device by winding the transformer’s copper coils around two cores that are attached to the box.

Door Switch

kenmore microwave not heating

The door switch is an important part of microwaves because it turns the microwave on and off to keep the food at the right temperature. It’s just a magnet attached to the door of the microwave.

A Door Switch of Microwaves is an electrical device that is used to open/close the door of microwaves. It controls the movement of the door by detecting its position. A door switch, when it detects the opening or closing of the microwave door, activates or deactivates the oven light and closes some circuit contacts for some time. The other function of a door switch is to detect if the door is closed or not. If it detects that the door is not completely closed, then it prevents microwaves from being produced and makes the oven inoperable.

Door switches for microwaves are a control system that is used to activate the activation of microwaves, as well as to deactivate them. The switches are usually controlled by some type of control mechanism on the outside of the door. Door switches also act as an indicator to let you know that your microwave is activated or deactivated.

When you close the door on your Kenmore microwave, the metal hinges pull the switch into place. This allows electricity to flow through that line and into the mainboard, which powers up your microwaves. When you open the door, however, this breaks the circuit by forcing the switch arm away from the magnet. The microwaves shut off automatically, and you have to press one of the buttons to start it up again.

Burnt Magnetron

The burnt magnetron of a microwave is when the spool that contains the metal can be seen being burnt from being in contact with the heat source. One reason why the spool could have been burnt is if the metal can got too hot and started becoming a conductor. In this situation, when it came in contact with the magnetron, it caused an electric arc to form which started one or more fires in or around the oven cavity. It is also possible for a defective magnetron to be a contributor to a microwave burning out.

A burnt magnetron is a similar issue as a burnt-out filament in an incandescent lamp. It is caused by the failure of the filament and can no longer be used to produce microwaves.

Burnt magnetrons cause many issues and will need to be replaced with magnetrons that are not burnt.

The magnetron is the crucial component of microwave ovens. It emits an electron stream, which is used to penetrate food with microwaves. The magnetrons are generally located behind the glass door on top of the oven. The power level of the magnetron changes according to the need, making sure that there is no over-heating or under-heating of food. If you notice flames coming out from your appliance, it probably means that the magnetrons are burnt out and need to be replaced. You can also see discoloration of your food while cooking. If this happens, then it’s time to replace magnetron for your appliance.

Burnt Thermal Fuse

In a microwave oven, a small super-heated metal filament inside the machine is heated as electricity passes through it, and this filament burns. The metal filament is designed to rupture when it’s hot enough to interrupt the flow of electricity and shut off the device. Sometimes, burnt thermal fuses don’t work, which causes the oven not to turn off. Microwaves that won’t turn off can interfere with a baby monitor or mobile phone signal because they use frequencies close to those of a microwave oven.

Microwaves are used in the kitchen to cook food quickly and efficiently. Microwave ovens work by using a metal rod called a thermal fuse, or thermostat, that when heated is designed to open the circuit when there is too much current flowing through it. This helps stop an excessive amount of power from passing through the heating element and into the food that you are cooking.

Solutions For Your Kenmore Microwave Not Heating

Microwaves heat food by making the molecules in it vibrate. The vibrations cause friction, which produces heat. But when your microwave is faulty, these waves will not penetrate the food and any food placed inside won’t be heated as a result. Fortunately, there are simple solutions to this problem that you can perform yourself without the help of an expert technician.

If you are the owner of a Kenmore microwave that is not heating, there are many possible solutions.

Some people think it could be as simple as changing the fuse or resetting the breaker for your house. Others may believe that they need to replace their oven’s control panel. The truth is, several different things can cause this issue and each one will require its solution. This part will take you through some of these solutions so you know how to handle your problem if it arises again in the future!

Discharge The Capacitor

Kenmore Microwave Not Heating

When your microwave oven’s capacitor fails, it can cause the door to open while cooking. The microwaves will continue to cook your food even though the door is opened. This could result in a fire hazard and possible injury.

The Kenmore Microwave Discharger is designed to provide you with peace of mind by eliminating this potential for harm! It also prevents other problems that are caused by a failed capacitor such as an overheated magnetron tube or blown fuse which would then require professional service costing more money than replacing the entire appliance! With the Kenmore Microwave Discharger installed, you’ll never have to worry about opening the microwave oven door during operation again. Just press down on its button once every three months.

A few people have been asking about how to discharge the capacitor of a Kenmore microwave. I’m going to walk you through the process. Make sure the unit is unplugged from the power outlet or else you will get zapped! You can verify this by looking for any electrical sparks coming from the outlet. Next, open up the door and remove all food that is in the microwave. Now we need to locate and identify where our capacitor is. There are two areas that it could be:

– The first is on the outside case close to where your wire harness plugs in (usually). If you find a small metal cylinder and wires and capacitors, then this is where your capacitor will be.

– The second location is on some microwaves. There is a small capacitor at the top inside of the microwave. This will be right above your glass tray and just to the left or right, depending on which model you have.

Once you know where your capacitor is, we need to discharge it so touch both points across from each other with one hand while it’s being discharged. One point needs to be metal, the other point needs to be a wire or anything that carries current. You could have something like water because it’s conductive so just touch the capacitor with your left hand and touch any exposed area of your microwave with your right hand.

Fixing The High-Voltage Diode

kenmore microwave not heating

Microwave ovens are a common appliance in the United States. They come in different shapes and sizes but they all have one thing in common: a high-voltage diode that provides power to the magnetron tube. These diodes are often known for breaking due to overheating, which can lead to significant safety hazards.   When these diodes break you must replace them as soon as possible because of potential fire hazards.

The high-voltage diode is one of the most important parts of the microwave because it is responsible for converting the alternating current (AC) to a direct current (DC). With this, electrons are pushed through the silicon tube with electricity. This creates a magnetic field that heats up the food.

There are two ways you can fix this issue: replace or temporary fix. A replacement can be done by removing the old diode and replacing it with a new one. The temporary fix, on the other hand, is done by making sure that there is no damage to any part of the diode, then pushing back in some wires that had come off inside of it.

To replace the diode, you need to open up your microwave and unplug it. After this is done, remove any screws that you see on the high voltage diode case and separate the cover from the main part of the microwave. Disconnect all of the wires that are connected to it and then pull out the old diode (you can refer to the diagram of the microwave or consult a repair manual for this).

Now, find the new high-voltage diode and verify that it fits your microwave. Connect all of the wires back to their correct places and then place the cover back on top without using any screws. Plugin the microwave again and turn it on immediately.

Fixing The Door Switches

Kenmore microwave door switches are notoriously unreliable. One day, you might open the door and the light comes on; the next day, it does not. You’ll hear a clicking noise when you press the buttons but nothing happens. No matter how many times you try to get your food heated up, it won’t happen until you fix that switch! Luckily for us, there is an easy DIY solution to this problem!

I just took apart the microwave to fix it. It was easy because I could follow the instructions given in the manual. I didn’t change anything because there were no problems with the wiring or other parts that would be visible without taking apart the microwave. I just needed to clean all of the dirt and grime out of it, which was causing it not to work and put it back together again.

If you’re not sure how to identify the difference between the door switches, unplug the microwave and take a quick look inside. The door switches are close to the outer edge and will be either hanging or mounted to the frame. There will also be two prongs sticking out and they’ll snap tightly onto a metal tab that’s located above them.

This video may help you in fixing:

Fixing The Magnetron

This article is about how to fix the magnetron in a Kenmore microwave. There is a problem with the magnetron in your Kenmore Microwave. It needs to be fixed and the only way to do that is by dismantling it and then fixing it. If you want to fix this problem, please follow these steps: 

The first thing you need to do is determine if it’s an issue with the magnetron or something else, such as a bad capacitor. If your microwave has a light bulb that goes off and on when you turn it on, then there’s probably no problem with the magnetron and only needs a capacitor replacement. Once you’ve determined this, follow these steps:  

– Unplug the appliance from the power source before proceeding

– Remove the cover over the top of the oven area by lifting from bottom corners and pulling straight out away from the unit as far as possible without disconnecting any wires or cables inside. Be careful not to pull too hard so as not to break the plastic locking tabs. 


Kenmore microwave is an excellent choice for any kitchen. They come with a variety of features to ensure that your food is cooked to perfection every time, and they’re also aesthetically pleasing on the countertop. Kenmore makes it easy for you to find the right microwave by providing information about each product’s size, power level, cooking speed, turntable type, color options, and more! If this sounds like something you might be interested in purchasing or if you need help deciding which model best suits your needs-microwave! We have friendly customer service representatives ready to assist at all hours of the day so don’t hesitate to call – we’re happy to answer any questions you may have!

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