Repair of the multicook Redmond

Repair of the Redmond multicooker is a problem that the owner of this wonderful cooking device sometimes encounters. To determine that the multicooker needs to be repaired is quite simple - it usually takes significantly longer to prepare dishes than before. This will be a sign that your kitchen appliance needs urgent repair.

In most cases, the cause of the device’s malfunction can be contaminated contacts and microcircuits, which ensure the operability and heating of the work surface. To eliminate the causes of the malfunction, you need to disassemble the multicooker body to get to all hidden elements of the device, and clean the microcircuits and contacts. How to disassemble a kitchen appliance and repair a Redmond multicooker, on the example of a budget model with a set of standard functions and a normal design, we will describe in detail in our article.

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How is the multicooker arranged?

Redmond multicookers have an attractive appearance, and the absence of all visible fixtures makes it very aesthetic and neat. Due to this structure, household appliances are in great demand.

To repair a Redmond multicooker, it’s important to know how to disassemble the appliance. For this, we will familiarize ourselves with its structure in detail:

• The body of the device consists of a bottom made of plastic and a metal rim that is worn on the bottom and forms the so-called multicooker wall.
• The elements are interconnected by two screws and hidden under the warranty sticker. One screw is cross-shaped, the second with a triangular head, which is attached with a nut directly to the wall of the device.
• The bottom of the kitchen unit is fixed with plastic teeth and glued to the outer walls of a thin sheet of steel.
• The steel sheet is rolled on itself, has the shape of a cylinder. Since the sheet is quite thin, it bends and breaks very easily.

Important! When repairing a Redmond multicooker, you should unscrew the screws very carefully so as not to tear the edges of the screws. It is not necessary to make special efforts when twisting them back so as not to bend the body of the equipment.

• The bottom cover is fixed to the inner walls of the housing for the bracket with the help of another additional screw.
• The inner walls of the device are made of a thick and durable sheet of steel, in shape they resemble a bowl, a slightly larger vessel for cooking.
• A wire connected to the main button passes through a hole in the bottom of the device.
• The heater has the form of a disk or washer with a cutout in the center, attached to the body with three screws with engraving washers.
• TEN has two contacts. One - is connected directly to the plug connector, the second - from the board of the switching power supply goes to the relay, which is controlled by the central circuit.
• The main button of the device is mounted on the heating element disk using a steel cylinder, a die is fixed directly to it. Between the die and the main button is a special spring.
• The Redmond crock-pot has two sensors: the first is located below right inside the lid, the second is above. Under the loop to the first are two wires: two signal and ground.

Important! Do not worry if a small amount of cereal gets on the main button. Nothing is located under the heating element, and the heating element is additionally protected by a flat cover, and the device will not be able to harm the food product. In the case of liquid, most likely, it will leak to the surface of the table through special holes in the case.

But do not forget about safety precautions, because if water gets in, a short circuit or fire of the fuses may occur. Therefore, immediately disconnect the device from the power supply. Better - turn off the power on the shield.Do not take on the plug; you may be shocked.

• As for heat fuses, they are also available in multicookers of this company. Thus, the device cannot suffer from overheating.

Switching power supply

The management of the functions of kitchen appliances can be of two types: sensory and mechanical.

The mechanical control system has a fairly simple structure:

• Simple microswitches are embedded in the board. With their help, the device counts the number of clicks, and the programmed memory chip calculates the corresponding installed program.
• This signal is a constant level, during the operation of which the transistor turns on and off.
• A specially installed zener diode does not allow the voltage at the contacts to exceed the prescribed level.
• An anchor on the relay closes the entire TENA circuit.

What happens in a switching power supply?

• The transformer, as a rule, is carefully wrapped with electrical tape and additionally filled with a transparent compound.
• Next to it (in most cases, to the right) is an input filter. It prevents the formation of additional input pulsations, since the multicooker practically does not create them.
• On the board by the location of the tracks, you will immediately notice that the resistor and capacitor are on the way to the transformer. It should be concluded that they protect the low-voltage part of the board. The resistor and capacitor have nothing to do with the power supply of the heating element.
• The transformer has two secondary windings, they are interconnected in parallel. Such a winding significantly increases the reliability of the operation of the equipment, since the multicooker does not require large power consumption. It seems that the circuit was developed for a completely different device.

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Repair of the Redmond multicooker

For the operation of the device, it is necessary to read two built-in sensors. Two wires go from them to the terminals of the control circuit, which is located under the buttons. Thus, it is not difficult to determine the malfunction of the power supply unit: when you turn on the device in the mains, not a single button is triggered, not a single indicator lights on the multicooker.

Important! It should be noted that very often breakdowns of household appliances are associated with power surges in an apartment building, where a huge number of them turn on, and each of them is at risk. You can insure yourself by purchasing special equipment. Read in our separate article aboutsurge protectors for household appliances.

How to ring a multicook transformer?

1. In the off state, the relay of the kitchen appliance is open, so there is no particular need to disassemble the unit.
2. There is poor resistance between the input terminals on the plug.
3. To determine the malfunction of the winding, you need to familiarize yourself with the value of the resistor.
4. By connecting the device in parallel, the sum of Ohms should be less than the lower resistance.

Important! The winding in most cases has a small indicator, as a rule, it is a two-digit number.

5. If the capacitor breaks the voltage, this will not affect the operation of the kitchen device.

How to check the capacitor?

1. Charge the input circuit of the instrument with direct current.
2. Insert a voltmeter parallel to the battery.
3. If the signal has disappeared or is constantly extinguishing, then the problem is in the capacitor.

How to check the relay?

1. After a detailed inspection of the circuit, you must pay attention to the double wire segment, through it a voltage of 220 V is supplied to the relay.
2. When disassembling kitchen utensils, the work board is positioned elements down. In the case when the current exceeds the permissible level, the wire begins to melt and drain to the bottom of the device.
3. If during spinning up the device you notice fused parts, the conclusion is the following: a circuit has occurred and repair of the Redmond multicooker is needed.

Although the reason for this may be the breakdown of the heating element, you should not rush to repair the fused elements. The problem may be something else. Therefore:

1. Take a multimeter and ring TEN. From simple calculations, your sensor should show a result of 30 ohms.
2. Turn on any program installed on the device, at this moment a voltage of 220 V should appear on the heater.
3. In the absence of the described indications, the relay or control circuit has failed. Thus, the repair of the Redmond multicooker will consist in their replacement.

How to check the control circuit?

1. Check the control scheme is also not difficult. To do this, a control voltage is supplied to the base of the transistor through a white wire.
2. If it is absent and the multimeter does not show the value, then the equipment breakdown is in it.

Important! Pluggable connections of devices are very often filled with a large amount of compound. This is done so that it is easy for the manufacturer to establish whether someone opened the equipment before contacting a service center or not.

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Thermal fuse. What is it?

A thermal fuse is a small cylindrical piece of wire that looks very similar to a resistor.

Important! The temperature at which it operates is equal to 170 degrees, and the maximum current is 10-15 A.

As soon as the indicators have exceeded the established standards, the thermal fuse instantly burns out, while the electric circuit breaks. Unfortunately, making it at home is very difficult. It may ultimately have other characteristics, which may result in even greater harm.

Important! The fuse has a low cost, so it is better to purchase it in a specialized store.

How to replace a fuse?

1. First of all, in order to find a burnt fuse, you must remove the bottom of the multicooker.
2. In most cases, there are several pieces of thermal fuses on the board; all of them are additionally wrapped in different colors with cambrices.
3. Under the main container for cooking is a button (heating element). When you take out the board, thermal fuses are located right next to this button.
4. Having carefully examined the circuit, you will immediately find cambrics - they are usually very noticeable, sometimes additionally wrapped with a clamp or screwed with a screw.

Important! Cambric is a small piece of wired insulation made of white plastic. It is used to protect the junction of different components.

5. Fuses are fastened exclusively by crimping.

Important! It is strictly forbidden to use soldering to replace a fuse, a hot tip will damage the board.

6. To determine which element is out of order, you need a tester. Call each one of them.

Repair of the Redmond instrument will consist in replacing damaged fuses with new ones.

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Microchip repair

For effective work in a simple multicook "Redmond" two microcircuits are built:

1. Power.
2. Management.

The power board is installed at the bottom of the multicooker, and to remove it enough, untwist the equipment from the bottom. And the control chip is at the heart of the technology itself, so you need to disassemble the kitchen appliance completely, and get the cylindrical surface.

Repair of the Redmond multicooker should begin with a thorough inspection of the board and determining the degree of breakdown.

The causes of the problem:

• Soot from cooking.
• Peeling and breaking tracks.
• Damage to solder joints.
• Swollen capacitors.

How to troubleshoot

• All removable items must be replaced.
• Repair damaged solder.
• Tracks on the scheme are cleaned with zero skin and tinning damage.
• In some cases, you can add jumpers, which are easy to make from the legs of the resistors.
• At the end of the repair of the Redmond multicooker, varnish the repaired areas, otherwise the appliance will fail again.

Important! Varnish serves as a kind of protection for metal conductors from water and oxygen.

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Stock footage

Crock-pots "Redmond" - high-quality and reliable kitchen assistants that work for many years. The main cause of failure of the device may be improper operation, less often - the combustion of thermal fuses. The causes of failure described above and their solutions will help you repair a Redmond multicooker at home without any difficulties. But if your device is under warranty, it is better not to take risks, but to contact a service center for the qualified help of a specialist.