Repairing hobs without involving a specialist will require basic knowledge in the field of electrical engineering. If any electrical equipment has already been repaired, then this work can be done quite efficiently.
How to repair hobs yourself will be discussed in detail in this article.
Types of hobs
Hobs can be divided into three main groups. These are hobs with simple heaters (TEN), hobs with induction heaters and gas hobs.
Hob with simple heater
These are tungsten-heated cooktops, much like the old tiles, but with a modern twist. Current flows through the spiral and heats it. The tungsten heater can be made in the form of a spiral or corrugation.
Induction hobs
The burners of such hobs represent the primary winding of the transformer. The current flowing through the primary winding induces a magnetic field of variable frequency around it. The secondary winding is a utensil made of ferromagnetic material. The currents generated in this dish heat it up. If the dishes are removed from the burner, there will be no secondary currents and there will be no heating. For this reason, special requirements are imposed on the dishes. It must be made of steel or cast iron, which can be checked using a magnet. Aluminum and stainless steel, glass and ceramic cookware will not work. And the bottom of the dish should be flat.
Hob with gas burners
This is an ordinary gas stove, but made in the form of a panel. Most often, the burners are also equipped with electric gas ignition. Natural gas approaches the burner. On approaching the ignition site, air is mixed with the gas to create the “correct” gas mixture. Well, then the mixture is ignited using an electric ignition spark, or, as in the old fashioned way, using a match.
Violation of operating rules
If you notice that the sensors on your hob are not responding or are behaving in some strange way, it is absolutely certain that something in the stove is broken; simpler reasons are also possible:
- If the sensor responds with a slight delay, it is quite possible that this is what the manufacturer intended so that there are no accidental triggers: this point should be clarified in the instructions.
- Check to see if you have installed child lock yourself and haven’t disabled it.
- The most natural reason is contamination on the outside or inside of the panel glass in the sensor areas: wipe it and check again.
- A one-time failure is also possible: try rebooting the panel by disconnecting it from the network for a couple of minutes.
And don’t forget that sensors are very vulnerable elements of an electric stove: they don’t withstand pinpoint impacts well, you shouldn’t pour boiling water on them or constantly place heavy dishes on them.
The most common breakdowns of hob surfaces
Repair of hobs can only begin after the true cause of the malfunction of the device has been established. Let's start with the electrical panels. First you need to see if all the burners or just one are not working. If all the burners do not work, then the test should begin by checking the voltage in the outlet. Then we check the electrical plug and cord. Next, there should be a fuse in the panel itself. We check him too. These are the simplest faults, and they are also the most common. It is best to check these faults using a multimeter. If at least one burner is working, then you can skip the check in the above paragraph. This means the voltage is safely reaching the hob. Most often, failure of electrical panels occurs for the following reasons:
- Failure of the heating element.
- Failure of switching parts of the electrical circuit (switches, switches).
- Control unit malfunction.
Diagnostics of breakdowns
Diagnostics can be carried out by disassembling the device or without it. In case of disassembly, the check is carried out in the following sequence:
- use a multimeter to determine the voltage level;
- turn off the stove from the power grid, inspect the power cord;
- the cable is checked by ringing for integrity and the presence of holes;
- oxidized contacts are identified by unwinding and inspection;
- the fuse also needs to be inspected for flaws, breaks, bends and fusion;
- an important part of the diagnosis is examining the outer pad for damage;
- The multimeter is used in almost all external inspections of parts.
Diagnostics by analysis occurs in the following sequence:
- the power plate is turned off;
- use screwdrivers to dismantle the panel;
- The fasteners are removed from the panel and the surface is removed;
- the wire is inspected for integrity;
- The thermal relay is checked by tracing the wiring;
- A multimeter is used to evaluate the condition of the transformer and thermal fuse.
Important
Increased resistance of the burner indicates its burnout. If the multimeter does not respond to changes in vibrations, then the burner is intact.
Hob repair tools
Do-it-yourself hob repair can only be done with the help of high-quality tools. For this purpose you need to prepare:
- Screwdriver Set;
- Side cutters;
- Pliers;
- Multimeter;
To restore some models, you may also need socket wrenches; if you are repairing induction hobs, you cannot do without a multimeter or tester. In addition to tools, you may need an electronic circuit diagram, especially in cases where electric hobs are being repaired.
If it doesn't turn on at all
If the equipment does not turn on at all, check the voltage immediately . If the voltage is low, the hob may not turn on. To avoid such situations in the future, it is advisable to install a stabilizer. This will significantly extend the life of the equipment, since electronics are very sensitive to power quality, and electronics are the most difficult to repair (and more expensive).
If the voltage is normal, we will continue repairing the hob by inspecting the power cord . Oddly enough, many breakdowns are associated with its damage - frayed, bent, crushed, insulation burst/melted, etc. First, we inspect the cord (disconnecting it from the network), then we check for the integrity of the wires and for insulation breakdown (each wire to the ground and to each other).
What to do if the hob does not turn on? First of all, check the cord and contacts
The next step is to check the contact in the terminal block . A loose or oxidized contact can also cause the hob to not turn on. What to do in this case? Unscrew the contact, clean it from oxides, and tighten it well again.
If the stove still shows no signs of life, find the fuse . It stands at the entrance, burns out during power surges - to protect more expensive parts from damage. It can look different, but most often it is a glass or ceramic tube with metal caps on the edges. Some types of fuses are shown in the photo below. There may be such options.
Types of fuses
We found the fuse, then take a multimeter and measure its resistance. It should be small. If the device shows an open circuit (infinitely high resistance), the fuse has blown. Another way is to put the multimeter in test mode and touch the probes to both ends of the fuse. The device is silent - it has burned out.
We take out the blown fuse and replace it with a similar one. Exactly a similar one - with the same parameters (indicated on the case). It is not recommended to install a “bug” or one with less sensitivity - with the next power surge the breakdowns will be much more serious.
The only easy check left is to check whether the power is reaching the control unit from the terminal block. Maybe the wiring is damaged or the contact is loose/lost somewhere. Do this again using a multimeter. We check the wires for integrity (you can do this by testing, you can by measuring the resistance) and the presence of insulation breakdown (on the body and between each other). If all parameters are normal, you can turn on the power and carefully measure the voltage at the input of the control unit. The voltage is normal, but the hob still does not turn on - the problem is in the control unit. Further repairs to the hob are related to this unit.
Users prefer electric, induction and gas stoves for cooking. If they malfunction, it is better to contact specialists. But, if you have the skills, knowledge and ability to work with tools, you can repair household kitchen hobs yourself.
How to disassemble the hob
In order to repair the hob with your own hands without errors, it is necessary not to damage the contact wires and other elements of the device during disassembly of the device. In addition, all electrical devices must be completely de-energized, and if induction hobs are being repaired, then it will be necessary to additionally discharge the capacitor unit, the contacts of which may contain dangerous potential, even after disconnecting the device from the 220 V network. Do-it-yourself hob repairs are carried out after how the upper decorative plane, together with the heating elements, will be removed from its seat in the countertop. As a rule, the hob is secured in the mounting hole of the countertop using clamps. Just gently pull it up and the panel will come out. But sometimes the hob is also secured with a sealant. You can watch the video on how to remove such a hob here:
Also, to properly restore the functionality of the device, it will be necessary to place the product on a flat, hard surface, with the heating elements facing up. How to disassemble a Samsung induction hob, see video below:
Other reasons
For safety reasons, some models may prohibit turning on a high-power burner and oven at the same time.
Some models refuse to turn on when the fan breaks down, which leads to a malfunction of the cooling system.
The hob has long become an integral part of any kitchen. It takes up much less space than a stove, but is equipped with a large number of convenient functions and options. But any, even the most reliable and high-quality equipment, can sooner or later fail. For example, an Lg or Bosch hob does not turn on. If this happens during the warranty period, you must call a technician from the service center or take the equipment yourself for repair. If a malfunction is detected after this period, you can try to restore it yourself before contacting qualified specialists, whose repair services will be very expensive.
Removing the heating elements
In most cases, repairing an electric hob involves replacing faulty heating elements. It will not be difficult to purchase such a spare part in a store, especially if the part in the surface of a well-known brand is changed. For example, repairing an Ariston hob can be done without even visiting a service center in person. A new heating element can be ordered in the online store, and the purchase will be delivered to your door by a transport company.
The heating element can be accessed after the bottom cover of the surface is removed. This can be done using a slotted or Phillips screwdriver. The location of fasteners differs significantly depending on the model. For example, repair of an Electrolux hob is carried out after dismantling the cover, which is held on by screws located at the corners of the product.
If an electric stove is being repaired, in which heating is carried out due to installed heating elements, then the malfunction of such an element can be determined using a multimeter. To do this, just switch the device to resistance measurement mode, and then connect the probes to the leads of the heating element. A burnt-out element will have an “infinity” resistance, so further repairs of the electric hob must be carried out with the obligatory removal of the faulty part. As a rule, such elements are held on 3 or 4 clamps, which are a bracket that presses the heater as a result of tightening the threaded connection. Repairing an Electrolux hob may differ significantly, but the principle of restoring such a hob remains the same. That is, you will need to remove the old heating element to install a new element in its place. 0
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Repair of a hob with an electric heater
Repairing such panels is the easiest. If the voltage approaches the heating element, but it does not heat up, then the electric heater itself (TEH) of this burner is faulty. You can also check it using an Ohmmeter (which is included in every multimeter). Just remember to turn off the voltage and check its absence using the same multimeter or an indicator screwdriver. Then disconnect the heating element from the circuit. Checking the electric heater with a multimeter:
If the electric heater is faulty, then its resistance is infinite. Then a simple replacement of the heating element is required. If the heating element is intact, but there is no voltage coming to it, then in addition to the plug and cord, you also need to check the switch (switch) of the comfoco. We check the voltage before and after the switch with a multimeter. If there is no voltage after the switch, replace it with a working one. Repairing the thermal protection of the hob, the video shows well how to do it:
Power surge
If power surges in your apartment are a common occurrence, then be prepared for electric stoves to react to them. Some models have protection against voltage surges: after this, the device does not turn on for several minutes. But if even after 10 minutes the electric stove does not work, then the accident did not pass without a trace:
- fuse burned out;
- due to a short circuit, one of the heating elements or its wiring could be damaged;
- The electronic control board is broken: the electronics are especially sensitive to voltage drops.
In any case, in such a situation, you should contact a specialist, even if it is just a blown fuse: firstly, in modern stoves there may be several of them, and, most importantly, you should not get into a device with high voltage.
And another piece of good advice: if you constantly experience power surges, purchase a voltage stabilizer and connect the stove and other sensitive household appliances to the mains through it.
Repair of internal panel wiring
If an electric stove is being repaired, then one of the common causes of breakdown is a break or burnout of the wire leading to the heater. This happens if the wire is not tightly screwed to the heating element. In this case, it is enough to connect the burnt-out internal conductor connected to the heating element to fully restore the functionality of the hob. The charred insulation on the wire must be removed. To do this job efficiently, it is recommended to completely replace the cable of wires that go from the switch or thermostat to the heating element. Repair of a built-in hob can also be carried out by replacing only one conductor. In this case, you will need to select a conductor whose cross-section should be no smaller than the wire being replaced. Otherwise, such repairs will be temporary.
Why might the buttons on an electric stove not work?
Touch panel buttons are the basis for controlling equipment. When a sensor fails, it could mean costly repairs or the purchase of new cooking appliances lie ahead.
There are burners located under the touch panel hob. Each of them is equipped with a heating coil, a halogen lamp and a corrugated tape. An electronic control module ensures the operation of the burners, which is controlled by touch buttons. If the sensor does not function, most likely the problem lies in the failure of this very electronic control module. Replacing it will entail significant costs. But don't get upset ahead of time. This may also mean that the wiring or contacts are damaged, which will not be difficult for the technician to replace or repair, but not so expensive for you.
Sometimes a completely banal breakdown occurs - the sensor may simply “fail.” In this case, you need to turn off the power to the device for a while, let the stove “rest” for 20-30 minutes, and then simply turn on the device. A reboot may resolve the problem completely and you can continue cooking.
Induction hob repair
Repair of induction hobs may be required if elements such as a transistor switch or high-frequency voltage generator fail. Repair of an Ariston hob is often accompanied by the replacement of the control unit, because to independently restore the electronic circuit you will need to have sufficiently deep knowledge in the field of operation of microprocessor technology. How to repair a Bosch panel control module, video filmed by a service specialist, see:
Control module failure
Symptoms: any: if the control unit fails, it is impossible to predict its behavior: for example, the stove can randomly turn on and off, indicators flash feverishly and similar madness
Of course, only a qualified specialist can accurately determine that a faulty control unit is to blame. And an unprepared person should definitely not get into it: the consequences will be fatal, including possible breakdowns of other expensive components of the electric stove. Usually the control module is changed or reflashed.
Glass repair
Repair of the glass of the hob is carried out only by completely replacing this element. Considering the difficulty of purchasing and the high cost of a new element, the optimal repair of a ceramic hob is to purchase a used product that has an ideal appearance, but the insides are practically beyond repair. Repairing the hob glass in this way can only be carried out if the “donor” body is ideally suited in size and brand. To repair a ceramic hob, it will be enough to carefully disassemble both surfaces and rearrange the internal parts from the old stove into the new housing. How to remove and install glass from a hob, the video shows this operation very well:
What to do next?
In any case, to accurately determine the breakdown (if it is not related to the protective functions of the panel), you must call a technician from an authorized service center who has the necessary competencies and can carry out competent diagnostics of the device. Unfortunately, repairs at official services can take a long time, since they only use original components. Also, the cost of calling a technician, diagnosing and carrying out repairs may be more than the panel currently costs. In addition to official services, private repairmen, who work in pairs or alone, also repair household appliances. Unfortunately, the quality of services when contacting them can be very low. The cost of repairs will be lower, but you will not receive a full warranty on the work.
The most reasonable solution may be to buy a new hob, which will not only be more beautiful than the old one, but will also consume significantly less electricity. Also, modern surfaces compare favorably with older ones by the presence of additional functions and operating modes.
Gas hob repair
Repairing a built-in hob running on natural gas is best left to specialists. We see what malfunctioning gas appliances lead to almost every day on TV. Unqualified repair of a gas hob can lead to the same consequences. You can carry out such repairs yourself only if you have extensive experience in handling gas appliances. The simplest repair of a built-in hob of this type is made by simply replacing the entire panel. For this purpose, you will need to purchase a new surface that will be ideal in size. If you decide to repair the gas panel yourself, then you must follow the rules for working with gas equipment. According to the rules, tools for working with gas equipment must be copper-plated, i.e. covered with copper. When carrying out repair work, the gas supply to the device must be completely stopped. Also, the electrical voltage from the stove must be turned off. One of the reasons for poor performance of gas burners may be the usual clogging of the gas nozzle. To restore the functionality of the device, it is enough to clean the nozzle hole from which the gas comes out with copper wire with a diameter equal to or slightly less than the diameter of the nozzle. Also, one of the common malfunctions of a gas panel is gas leakage from the connections of gas pipes inside the panel or the faucets of this panel. Be sure to watch the video on how to repair a gas leak from the control valve:
In this case, all gas pipeline connections must be connected as tightly as possible. Checking gas leaks in connections is checked by “soaping” the connections.
Be sure to watch the video for an example of checking a gas leak. The test was done using an old-style gas stove as an example. Checking for gas leaks in a gas panel is no different.
Another very common defect in the operation of gas panels is the incorrect operation of the ignition system. Externally, such a breakdown manifests itself in the form of insufficient sparking of the fuse, as well as in the complete absence of a discharge between the electrodes. In this case, repairing the built-in hob will involve replacing the electronic unit. In order to dismantle this element, it is necessary to disconnect the oven from the mains and remove the top cover. Access to the electronic unit will open, but before you begin dismantling it, you should make sure that the button that turns on the igniter is in good condition. To do this, just connect the wires coming from it to the multimeter. After pressing the button, the device should show a resistance of about 1 ohm. If this does not happen, then most likely it will be enough to replace only this element to restore full functionality of the hob ignition system. Otherwise, you need to purchase a new electronic unit and then install it in place of the faulty element. How to repair the gas ignition system video, see here:
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Hobs help housewives, but they also add problems when they break down, causing serious disasters. In order to avoid situations in which our ancestors found themselves, deprived of a comfortable life, it is necessary to quickly eliminate equipment malfunctions and return pleasant predictability to our modern abode. We will tell you how to fix the panel with your own hands.
Electrical panel repair
Most often, users complain that the hob does not turn on. There are only two answers to the question “why did this misunderstanding happen to my equipment?”
1. no voltage in the outlet;
2. circuit break.
To check if the outlet is working, you can use a multimeter, which will show if there is voltage. A hairdryer or other compact electrical appliance is also suitable. The verification principle is simple: if the unit turns on, everything is fine with the socket, and the cause of the malfunction must be sought in the hob itself.
Circuit failure is a general name that combines a number of problems that cause the hob to malfunction. Among them are a burnt fuse and a broken contact, overheating of the sensor, or cable failure.
Read also: Smoking with gas at home
Let's take a closer look at each of the emerging problems.
Some models have a high-fuse fuse. It easily burns out from power surges, taking on a “blow” that would otherwise affect the operation of the hob. If the kitchen helper fails for this reason, it’s not so bad: the fuses cost a penny, and any average professional can handle replacing them.
If one of the burners does not work, this situation is caused by broken contacts leading to the heating element. You can troubleshoot the problem as follows:
- Carefully turn the panel over;
- Inspect the contacts;
- If you find a break, solder the wires with a soldering iron.
If the hob does not work, you must carefully examine the condition of the cable. If you find breaks or damage, under no circumstances should you use such a unit, as this can cause a short circuit and cause the device to completely fail. Found a broken cable? Replace it with a new one or at least isolate the damage!
If the heating element fails, you should:
1. Purchase a new heating element;
2. Replace the failed part. It would be useful to remind you that this procedure can only be done when the panel is turned off. For this:
a) disconnect the terminals of the burnt-out heating element; b) take it out; c) install a new one; d) connect the contacts to it using connecting terminals.
A damaged sensor that does not “listen” to commands can be repaired yourself. This is done as follows:
- First you need to check whether the sensor is receiving contact. You can use a multimeter for this;
- If the problem is a broken circuit, use a soldering iron to reattach the broken wire.
Advice: leave the panel sensor repair to professionals.
Why does the unit crack? Chips and cracks “decorate” a glass-ceramic hob quite rarely, but they arise not without the fault of the user, who forgets the 2 basic commandments of operating the equipment: do not hit, do not overheat.
Sometimes breakdowns are “evidence” against the manufacturer’s dishonesty in the form of a violation of production technology.
It doesn't matter whose fault they happened. When there is an empty refrigerator in the house, and the hob ignores the wishes of the owner, an urgent question arises: how to replace the glass, and whether it is worth calling a specialist. The cost of a sheet of glass ceramics is approximately equal to the price of a new hob, so it is hardly advisable to carry out such a replacement.
Among other “whys,” hob users are interested in why it turns off on its own. Most often this occurs due to a violation of the integrity of the contacts. Alternatively, in touch models the main part “flies off”.
Induction hob repair
According to the induction principle, popular in cooking surfaces, heat is directed to the contents of the pan, rather than to the surface of the stove and utensils in which the dish is being cooked.
These devices, based on technological advances, most often break down like this:
The unit turns off immediately after turning on, or does not turn on at all
Induction provides low heat
The stove lives its own life, turning on by itself, even when there is no frying pan or kettle on the burner
The panel doesn't work at all
Most often, owners of induction panels are concerned about the complete failure of the stove to perform its functions: the kitchen assistant turns off after being turned on, or does not show any signs of life at all. Most often, this situation is caused by improper use of the unit. Simply, the smart panel recognizes the wrong utensils being used for cooking and goes on strike if you decide to cook food in a saucepan made from a material that is not suitable for the unit. Yes, size matters in this case too!
Tip: Do you want your induction hob to provide trouble-free operation? Use suitable pots and pans! The instructions for each product describe in detail which utensils can be used on a specific panel. Don’t neglect the advice, and you will be happy in the form of a delicious lunch!
The traditional children's riddle “it shines, but does not heat”, with the spread of induction panels received an unexpected answer: the surface and unsuitable cookware. Poor heating of the induction panel also falls under the category of errors caused by the wrong choice of cookware. The bottom of pots and kettles should be perfectly flat. Even millimeter-sized notches or concavities provoke a decrease in the performance of the unit.
Even more offensive, and even more dangerous, is the spontaneous switching on of the panel. Try the following in this situation:
1. Remove knives, forks, spoons, scrapers, foil - anything that contains metal from the cooking surface;
2. Wash the surface, completely removing salt deposits.
Did not help? The control unit is malfunctioning. You can’t do without a specialist here.
The complete absence of any signs of device viability has a number of reasons:
- No power at the outlet. You can check it using any electrical device, say, a coffee grinder.
- Blown fuse. To eliminate the malfunction, it is enough to replace the part.
- Broken contact in the circuit. In this case, it is advisable to contact a specialist.
Read also: How to calculate capacitors for a 220 motor
Gas hob repair
Units that do not have sophisticated electronics are easy to repair, and in some cases problems can be fixed on their own.
The most common problems with gas-powered kitchen helpers are:
1. problems with gas ignition;
2. gas does not reach the burner.
If the gas does not ignite or ignites poorly, you must:
- Check the piezoelectric element for the presence of liquid or fatty deposits;
- Rinse and dry it;
- If this operation does not resolve the problem, check whether electricity is supplying the auto-ignition system. If the contacts are broken, the technician will solder them. You can do this yourself.
If the gas hob burners do not turn on due to lack of gas supply, do the following:
1. Check if the valve on the gas pipe is open. Found it closed? So open up;
2. Is there gas in the system, but is it not supplied to the burner? Clean the injectors. Remove any remaining food and fat from them. Wipe away any remaining moisture. Most often, this is enough to remove not too serious stains. If the nozzles are particularly dirty, a thick needle or awl will help.
Tip: Do you want your gas hob to live happily ever after, delighting you with trouble-free operation? Do not leave until later to clean up spilled liquids and pieces of food that fall out of the pan onto the panel during cooking. Removing dried and hardened evidence of culinary research will be more difficult later.
Most problems with cooktops can be avoided. All you need to do is follow the “commandments” of thrifty owners:
- follow the operating instructions;
- keep the device clean.
Minor faults can be eliminated on your own if you have previously had experience in repairing them, or the surface still requires replacement, and you “don’t mind” it. To repair an expensive unit, invite a specialist.
How to repair a hob, see here
The hob is one of the most important appliances in the kitchen, and like any other equipment, it is susceptible to breakdowns, but it’s quite easy to repair it yourself. If a malfunction is discovered during the warranty period, your stove will be repaired free of charge. But if the breakdown occurs several years later, you can try to repair the hob yourself, since contacting specialists may cost little less than buying a new stove.
In this article, our specialists have listed all the malfunctions of hobs and step-by-step disassembled the process of repairing faults with their own hands.