No household appliance has generated as many debates about safety and usefulness as the microwave oven. There are still myths about harmful food from the microwave, the negative effects of radiation on humans, even about the radioactivity of the device. However, all this is nothing more than fiction. Back in 2008, the World Health Organization officially confirmed the safety of microwave waves for humans.
Most users cannot imagine life without such technology, because it is convenient, practical and fast. Therefore, when problems arise, they try to fix them as quickly as possible. Let's look at the reasons why the touch buttons on the microwave do not press and how to eliminate them.
Main reasons for refusal to work
A microwave oven is a multifunctional electrical appliance designed for quickly heating and cooking food . Modern models differ in color, design, set of functions and technologies, and type of control.
There are 3 types of microwave oven control : mechanical (using handles), push-button and touch.
Reference. The share of microwave ovens with touch controls is approximately 60–70%.
The touch panel is a multilayer film on which non-protruding buttons are displayed on the front side, and inside there are conductive tracks that drive the buttons.
Such electronics are sensitive, do not tolerate rough handling and often fail. Main causes of problems :
- violation of the integrity of conductive paths;
- touchpad contacts sticking;
- broken contacts at the junction of the keyboard cable and the control unit connector.
Another common cause of the problem is pollution . In the kitchen, buttons on household appliances inevitably become dirty and eventually stop responding to pressure. In this case, it is enough to thoroughly wipe them from the outside to remove dirt.
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Microwave oven Samsung ME88SUG on Yandex Market
Microwave oven Horizont 20MW700-1378AAW on Yandex Market
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Microwave oven Samsung GE88SUT on Yandex Market
Microwave oven Bosch BFL524MS0 on Yandex Market
A microwave oven is one of the most popular household electrical appliances. Quite often, when purchasing a microwave oven, potential consumers opt for models equipped with a touch keyboard. As of today, this type of microwave oven is the most popular in the domestic market.
Restoring the touchpad
You can restore the microwave touch panel yourself . For repair you will need:
- Screwdriver Set;
- knife;
- electrical tape or tape;
- alcohol for degreasing;
- conductive adhesive;
- multimeter to check connections.
Before work, be sure to disconnect the device from the network . However, even in this state, electrical current accumulates in some elements, so it is important to proceed with caution.
To gain access to the panel, disassemble the oven:
- Unscrew all the bolts on the front panel of the case (they are even on the bottom).
- Remove the front panel of the case.
- Unscrew the protective panel, which will provide access to the control unit.
- Disconnect the cable connecting the control unit and the touch panel.
- Carefully pry off the thin touch keyboard with a knife.
The keyboard is carefully peeled off : a thin stationery knife is used to pry up a corner of one of the films, pick it up with your fingers and smoothly detach it from the base. The film with conductive tracks will open.
Damage to conductive paths
The film with tracks is inspected for oxidation of contacts and damage to conductive tracks. Particular attention is paid to areas where non-functional buttons are located.
The damaged conductive path is restored as follows::
- The surface is thoroughly degreased.
- Conductive glue is applied.
- Leave to dry.
- The tracks are checked for conductivity with a multimeter.
- Reassemble the device in reverse order.
If conductive glue is not available, a soft pencil will do . Use a stylus to sketch out the damaged area.
Contacts sticking
Sticking touch buttons most often occurs due to excessive pressure on the panel . As a result, the film is deformed and the contacts stick together.
Reference. Usually the most popular buttons fail - “Start”, “Stop”, favorite modes.
Fix the damage by increasing the distance between the upper and lower films. The procedure looks like this :
- Degrease both films.
- The inner surface of one of them is sealed with tape or tape, leaving the contact pads open.
- The device is assembled.
After assembly, check the functioning of the device . The buttons should provide reliable contact and operate with light pressure.
Loop defects
If all the buttons in the microwave do not fully work or the display does not show, it means that the cable has fallen out of the connector of the connection block or the tracks have oxidized and collapsed.
Let's look at each breakdown separately:
- In the first case, it is enough to tightly insert the cable into the connector of the control unit.
- In the second, the tracks are thoroughly degreased. If they are destroyed, the end of the cable is trimmed a few millimeters and again inserted into the connector to make sure that contact is restored.
After work, the layers of the touch keyboard are fastened , the device is assembled and tested.
Reference. If there is not enough glue on the panel films for fastening, it is additionally coated with PVA glue, avoiding the contact areas of the buttons.
Repair of conductive paths
Another problem that can arise with a microwave oven is oxidation of the conductive paths. How to fix this situation?
If the damage has occurred recently and has not yet spread over a large area, you can eliminate it in the following way:
- Treat the oxidized area with a solvent and remove traces of damage.
- Repair the damaged part of the track with special conductive glue. Attention: the composition must be applied in a thin layer and be sure to wait for it to dry completely - only then can you assemble the panel.
Did not help? Try using a thin strip of aluminum foil instead of glue and stick it to the tear area.
Remember that this method only helps with minor damage. If most of the tracks and contacts have oxidized, simply replace the panel with a new one.
How to convert a touchpad to a keypad
It happens that the stove keypad cannot be repaired, and an original replacement part cannot be obtained. The simplest solution is to convert the microwave touch panel to a push-button one . For this:
- The device is disassembled, the touch panel is removed and it is peeled off.
- Redraw the diagram from the panel film.
- They form a circuit for assembling a keyboard with regular buttons.
- Drill holes for the buttons, using part of the original keyboard as a template.
- Mount the buttons in plastic, checking the smoothness and evenness of their movement.
- Solder in accordance with a pre-drawn diagram.
- Assemble the device. In this case, it is better to place the front part of the original panel on double-sided tape, like a picture with buttons drawn on it.
After repair, the equipment is connected to the network and the functioning is checked .
Often, a microwave oven is used only for heating food, so when repairing a keyboard, only 2 buttons are left - “Start” and “Stop” . How to turn on a touch microwave with one button? The steps are the same as when replacing a touch keyboard with a push-button one. Only when a new scheme is formed, all the buttons are removed from it, leaving only “Start” and “Stop”.
The best microwave ovens according to customers
Microwave oven Samsung ME88SUG on Yandex Market
Microwave oven Horizont 20MW700-1378AAW on Yandex Market
Microwave oven BBK 20MWS-726S/W on Yandex Market
Microwave oven Samsung GE88SUT on Yandex Market
Microwave oven Bosch BFL524MS0 on Yandex Market
Sometimes technology starts to behave strangely. Turns on when it shouldn't, switches modes or doesn't respond to commands. Of course, if you doubt your knowledge of electronics, it is wiser to contact a specialist. But what can you do if the buttons on the microwave don’t work?
The touch buttons are designed in such a way that current tracks are applied to two films. If you press the button, it can create a contact closure.
Everything about the buttons on the microwave: designation and functionality
Today, an integral attribute of kitchen equipment is a microwave oven. This is a compact device that performs a variety of functions.
In the microwave you can cook any dish, bake a pie, heat up lunch. This unit has become so firmly established in our lives that we cannot imagine how we managed without it before.
Units with touch controls are especially popular.
Microwave
About touch models
What is touch control? Essentially, this is the same push-button mechanism, but hidden under the facade of the stove.
To enable or launch the desired function, just press your finger on the control panel. The operating principle of touch microwave ovens is similar to touch phones.
Such units are more expensive. But such models have a drawback - the buttons freeze during power surges.
Touch control panel
Advantages
Touch-sensitive microwave models are ideal for programming special recipes and programs. Some models contain folders in their memory in which the user can store the recipe they like.
As a rule, control using sensors is very simple. The owner has the ability to press one finger to start the unit and select the most suitable mode.
Touch microwaves have a beautiful, strong design that fits perfectly into kitchens.
If it happens that the buttons on the microwave do not work, a banal power surge in the network may be to blame. Unfortunately, innovative microwave models are extremely sensitive to voltage drops.
As a result of such vibrations, the buttons on the unit stop responding to user actions. The delicate mechanism does not accept rough handling. This means that pressing the sensor too hard will also cause damage.
Touch control panel repair
If a breakdown occurs, as a result of which the buttons on the microwave cannot be pressed, you will not be able to repair the device yourself. In this case, you must contact the service center.
Customers are increasingly purchasing LG microwave ovens. Affordable price, attractive design and wide functionality make units from this manufacturer popular.
Using the touch control system, the housewife has the opportunity to:
- put the device into operation,
- turn on defrost mode,
- grill,
- convection,
- select and run a specific recipe.
Almost all LG models are equipped not only with a convenient Start button, but also with buttons indicating the weight of the products sent to the oven for heat treatment. Thanks to this option, the housewife has the opportunity to adjust the power of the device depending on the weight of the dish.
Control Panel
Possible problems
Like any equipment, touch microwaves sooner or later require repairs. The most common problems found in these units are:
- Heating does not function.
- The Start button does not work.
- The disk mechanism does not rotate.
- The grill is not working.
- There is no response to pressing the control panel.
If the oven suddenly begins to behave incorrectly. The heating or cooking time decreases or increases, regardless of the specified operating parameters, the unit requires repair. Typically, these problems are resolved by repairing the sensor mechanism.
We fix the breakdown
So, if the device begins to behave in an unusual way, turning on and off randomly, the owner needs to know that this means the stove is broken. The touch buttons on the microwave operate thanks to a membrane.
When you press on the outside of the device, the signal is transmitted through the membrane to the controller, after which the desired function is launched.
But, if the membrane fails and stops transmitting signals, starting the microwave will be impossible.
Button repair
Repairing microwave buttons begins with disconnecting the device from the power supply. Remember that even when turned off, high voltage remains inside important components.
Therefore, you should be very careful during the repair process. Then, unscrew all the bolts securing the front cover. Carefully disconnect the membrane cable from the control panel and the terminals from the relay system.
At this stage, it is important to remember the correct connection of all elements of the device.
Next, unscrew the plastic panel from the frame and the main board from the plastic panel. It is necessary to very carefully peel off the touch panel film from the plastic base. After removing the membrane, we divide it into layers. To increase the distance between the outer film and the working part of the membrane, it is recommended to stick adhesive tape or insulating tape between them.
After troubleshooting the buttons on the LG microwave, you need to reassemble the entire structure, proceeding in the reverse order. After such repairs, the touch keys will work from two weeks to a year. The service life depends on the length of operation of the device and the care of the user.
A microwave oven repairman will tell you more about touch buttons, functionality and possible breakdowns in the video.
In custody
A touch-controlled microwave oven is a great purchase for your home. Stylish design, wide functionality and simple controls make these models in demand.
If it happens that the Start button does not work or the sensors are not pressed, it is recommended to send the device for repair.
Professional repair of the breakdown will extend the life of the functional device.
Source: https://tehnika.vyborkuhni.ru/mikrovolnovka/knopki-mikrovolnovke
The buttons do not work, the microwave fuse is on - repair
A microwave oven as a kitchen appliance provides us with comfortable conditions when heating or cooking food. But sometimes she starts to behave very strangely. It turns on when it shouldn’t, doesn’t respond to commands, or switches operating modes without permission. Let's look at what could be the reasons for this strange behavior and how to eliminate them.
What to do if the microwave buttons do not work?
The keyboard for controlling the operation of a microwave oven is usually made in the form of a multilayer film or according to the principle of television remote controls. The keypad or touchpad wears out over time and needs to be replaced.
The main reasons for keyboard failure are as follows:
- break in the electrical circuit;
- control board malfunction;
- loss of contacts in the connector;
- sticking of contacts.
Before you start repairing the microwave oven keyboard, you should make sure that it is the button that is not working, and not the entire control system.
Diagnostic procedure and troubleshooting methods:
- if the indicator panel lights up . It is necessary to check the reliability of the keyboard bus installation in the control unit connector. If the contact in the connector is reliable, then you should replace the keyboard with a new one;
- if not all keyboard buttons (keys) work . In this case, it is also necessary to check the bus contact in the control unit connector. If the contact is good, the keyboard is replaced with a new one.
To disassemble the touch panel, you must first unplug the microwave, and then:
- unscrew the bolts that secure the microwave cover;
- slowly disassemble all existing connections;
- Unscrew the screws on the special protective panel;
- remove the control module from the panel;
- use a thin knife to disconnect the touch plate;
- divide the plate into two parts;
- check the integrity of the conductive tracks on the plates. In the case when all the tracks are intact, the problem may be the contacts are shorted. To prevent a short circuit, it is necessary to increase the distance between the plates. To do this, insulating tape or tape is glued to the inside of the plates;
- connect the plates and connect the cable to them;
- glue the sensor in place;
- assemble the microwave;
- check the functionality of the buttons.
All actions must be performed as carefully as possible so as not to damage the device even more. It is also necessary to understand that such manipulations with the touch panel are only a temporary solution to the problem .
The buttons on it will continue to move away, creating a new short circuit. You can completely get rid of this problem only by replacing the sensor.
It is better to entrust this operation to specialists, especially if you have no experience in repairing microwaves.
One of the most common failures of microwave ovens is a blown high-voltage fuse. If such a malfunction occurs, the device, as a rule, does not turn on and does not respond to commands.
First of all, the microwave oven should be removed from the built-in furniture, if the microwave oven is a built-in type.
To replace the fuse, you need to unscrew the screws on the rear panel and remove the protective cover. In this case , be sure to discharge the high-voltage capacitor , and then use a multimeter to check the presence of electrical voltage on the surge protector board and the integrity of the wires from the electrical outlet to the terminal connectors.
If there is no damage to the wires, check the high-voltage fuse. It is often installed in a transformer block located on the power filter board. If it burns out, it must be replaced. Having eliminated the malfunction, you should analyze the cause of the overload, due to which the fuse blew .
To do this, you need to inspect the internal components of the device. If there are swellings, drips, darkening or breakdowns on its parts, it is necessary to test the control unit.
As a rule, after replacing the fuse, the operation of the microwave is completely restored.
If, after installing a new fuse, the stove does not work, then most likely the magnetron or transformer board of the device has failed.
Sometimes the fuse blows when the microwave door is opened. This is often due to contamination of the microswitch button . A dirty switch does not operate when the door is opened, causing a short circuit. To fix this problem, you need to clean the microswitch.
Many microwave malfunctions can be eliminated if you operate it correctly. To do this, you must follow a number of simple rules:
- do not heat food in metal containers;
- do not turn on the oven without food;
- do not heat liquids in open containers;
- carry out preventive measures in a timely manner and replace worn parts;
- keep the oven clean;
- Use an uninterruptible power supply to protect against power surges.
Follow these simple operating rules and treat your equipment with care if you want it to please you with its work for many years.
conclusions
Repairing a microwave oven yourself is not a completely safe process and is quite labor-intensive. Therefore, if problems arise with this device, it is better to contact a professional technician, especially if it is still under warranty . A specialist, firstly, will be able to correctly determine the cause of the breakdown, and, secondly, will eliminate this breakdown efficiently and quickly.
Source: https://kuhnya-tehnika.ru/knopki-mikrovolnovki.html
