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The Microwave Does Not Heat, But It Works, What To Do - The Main Causes Of Breakdown, Features Of The Repair Of Rolsen, Samsung And Others, As Well As User Reviews
The Microwave Does Not Heat, But It Works, What To Do - The Main Causes Of Breakdown, Features Of The Repair Of Rolsen, Samsung And Others, As Well As User Reviews

Video: The Microwave Does Not Heat, But It Works, What To Do - The Main Causes Of Breakdown, Features Of The Repair Of Rolsen, Samsung And Others, As Well As User Reviews

Video: Microwave oven working but not heating. Easy fix diy. 2019 update 2022, December

What to do if the microwave does not heat up, but works?


Microwaves are an essential part of any kitchen. The ability to quickly reheat or even prepare a dish is simply necessary with the current hectic pace of life. But, like any household appliance, the microwave can fail. And a symptom of one of the most common breakdowns in an electrical appliance is the continuation of the rotation of the dish, with inactive heating elements. To put it simply, it still works, but it doesn't heat. What to do in this situation?


  • 1 Description of the problem and possible causes

    1.1 Video: fixing a breakdown using the example of a Samsung microwave

  • 2 Fault finding in the microwave
  • 3 Repair steps
  • 4 Features of the repair of specific models
  • 5 Prevent breakage of the microwave

    5.1 Video: Caring for Your Microwave

  • 6 Customer Reviews of Various Microwave Ovens

Description of the problem and possible causes

This problem is common, and there may be several reasons for it. The fact is that the rotation of the pallet with the product, light and other signs of operation are independent of the "insides" of the microwave oven. It turns out that some of the equipment may fail, but in appearance the furnace will function correctly. The main reasons for these symptoms are:

  • Blown fuse - If the fuse is blown, it needs to be replaced. Usually there are several of them in a microwave oven, but one blown fuse is enough for the oven to malfunction. Fortunately, they are cheap. But you should not approach replacing the fuse carelessly. They protect your kitchen from fire in case of power surges;
  • if you hear an extraneous noise during the operation of the microwave oven, reminiscent of crackling, then most likely it is the condenser. You can check it with a simple ohmmeter, before that, of course, you need to turn off the device from the network and get rid of the voltage;
  • a magnetron is already a more expensive breakdown for you. The main symptom will be increased hum when trying to operate the oven;
  • breakage of diodes - they are easier to replace than to check, so it is better to think on them last.

By itself, this breakdown is very unpleasant. After all, the microwave stops working as it should, but only creates an appearance. In addition, if it was a closure, the situation can only get worse with further attempts to use.

Microwave oven breakdown
Microwave oven breakdown

If food heats up too slowly or does not heat up at all, this is a sure sign of oven breakage.

In addition to the above reasons, there are a number of things to check before repairing:

  • problems with voltage in the mains - if your mains produces less than standard voltage, there will be problems with heating food. The smallest changes can lead to unpleasant consequences in the operation of the microwave;
  • the power grid is overloaded - when a large number of devices are operating from one network, the voltage may not be enough for everything. As a result, your food will also not be properly reheated, although the microwave will work;
  • problems with door latches - if the door of the microwave oven does not close tightly, then the food will not be effectively heated. This problem is easy to detect - just check if the door moves during operation when exposed to it;
  • choosing the wrong oven mode - accidentally switching the microwave oven to low power modes can cause confusion when you try to reheat food further. Just check the settings you are using when warming up.

If you are sure that a breakdown is still present, it is worth starting to detect and repair it.

Video: fixing a breakdown using the example of a Samsung microwave

Finding a fault in the microwave

It is not so difficult to find out which of the listed reasons is the case. Just follow these steps for detailed verification:

  1. Measure the voltage at the outlet where the microwave is connected. It must comply with the standard.
  2. If everything is fine with it, unplug the microwave oven and make sure it is de-energized. Then remove the cover on top of the oven to gain access to the interior of the equipment.

    Removing the cover
    Removing the cover

    When repairing the oven, it is necessary to remove the cover, which is fixed with bolts

  3. The fuse is checked simply visually. If none of them looks burnt out, then something else is wrong.
  4. Using an ohmmeter, measure the presence of voltage in the capacitor and diodes. If the ohmmeter needle is stationary, the problem is in the capacitor. With resistance, it is worth replacing the diode. It still won't work to check it in a more reliable way, but the diode is quite inexpensive.
  5. And finally, it is worth checking the magnetron directly. Wait for the microwave to cool completely and visually examine it. Pay attention to the contacts. If you don't see any problems, it is worth checking the resistance of the threads. But even if there is the correct resistance (about three ohms), there may be problems with the lamp.

    Microwave Oven Parts
    Microwave Oven Parts

    Good to know the location of the parts inside the microwave

Repair steps

The microwave does not allow for a lot of DIY repair steps. Do not start repairing if you are not sure of yourself, and check every part for charge before touching it with your hands. This is especially true for the capacitor and magnetron - they will need to be de-energized. Even if you have probably determined the cause of the breakdown, in almost any case you can only replace the broken part and nothing more:

  • fuses - replaced immediately at the slightest sign of malfunction. They are inexpensive and easy to dismantle;

    Circuit breakers
    Circuit breakers

    The role of fuses is very important and they are inexpensive to replace.

  • capacitors and diodes are also easy to replace. But if the capacitor can be thoroughly checked before this, then we can only guess about the breakdown of the diode by indirect signs. It is too difficult to carry out a full check at home, and it is not worth it, given the low price of the part itself;


    Diodes are easier to replace than to check for sure if they are broken.

  • The magnetron is the heating element of the microwave oven. And it can also only be replaced, if, of course, the breakdown is not entirely trivial. For example, if you visually see a detached contact, it is worth fixing it back, but otherwise you will have to replace the entire part;


    When replacing a magnetron, you should either take it to the store or write out the serial number

  • replacing the transformer yourself can be dangerous. It is not recommended to do this, but if you are still going to make a replacement at home, be sure to de-energize it. It can store a charge for a long time even when it is turned off.

    Replacing parts
    Replacing parts

    Be careful when replacing microwave oven parts

As you can see, the actual repair of parts is practically not done independently. Personally, you can either identify the broken object and replace it, or call the wizard right away. Of course, the master will tell you exactly what has broken and will replace it if necessary. Do not try to repair the magnetron or other parts yourself. This is almost impossible and can only exacerbate the breakdown.

Features of the repair of specific models

The reasons for such a breakdown are almost always the same, regardless of the microwave oven model. But, nevertheless, there are still some small differences in their repair:

  • Samsung ovens have very reliable mechanical parts. That is, the cause of a breakdown will rarely be the failure of the door latch, and you should immediately proceed to checking the electronics;

    Samsung microwave
    Samsung microwave

    Samsung equipment is durable

  • Rolsen microwave ovens quickly deteriorate. Moreover, we are talking about both parts and the case. Using this microwave is simply dangerous, and the most common breakdowns are short circuits and wear of the case;

    Rolsen microwave oven
    Rolsen microwave oven

    The domestic Rolsen oven is often a poor quality product.

  • inexpensive Panasonic models are prone to rust. This will not lead to damage directly, but it will still make the microwave unusable after several years of active use;

    Microwave Panasonic
    Microwave Panasonic

    Panasonic ovens rust over time

  • LG ovens are quite durable. When repairing, it is worth checking the capacitors and fuses first - they often fail with voltage surges in the network.

    Microwave oven LG
    Microwave oven LG

    LG microwave oven rarely fails

We do not allow damage to the microwave

There are a number of rules to help you keep your microwave oven in good working order and prevent breakdowns like these. Just follow them and your device will last you much longer:

  • never reheat food in metal containers or containers painted with metal paint. Gold plated or silver blotches can also be dangerous. Such paint will immediately begin to sparkle, and may even catch fire;
  • do not use the microwave oven without objects inside to warm it up. This is harmful to the device itself;
  • use a protective cover to avoid rapid contamination of the microwave oven. Especially if you are heating food that tends to "explode" when reheated (raw eggs, etc.). Such a cover increases the life of the microwave oven;
  • do not heat food in tightly closed containers. Hot steam must be able to escape from the container;
  • it is worth giving the oven to the master for diagnostics every few years. This is especially true for cheap models, as they often fail;
  • be careful with mechanical parts. If you slam the door too actively and strongly or do not fully press the button when opening it, you risk breaking the latches.

Video: Caring for Your Microwave Oven

Customer reviews of various microwave ovens

Studying reviews will help identify the most reliable microwave oven models.

Repairing a microwave oven primarily means replacing parts that are out of order. You should not take on this business on your own if you are not confident in yourself. However, it is useful to know where which part is located, as well as be able to identify its failure. Most importantly, do not forget about safety when working with this electrical device, and also follow the advice given to minimize the risk of damage.

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