Faults microwave and Solution

Troubleshooting Techniques

Methods of self-help work the microwave depends on the diagnostic features. It is important to identify the problem, monitor the operation of the oven: it turns on whether the food warms up enough.

To discover all checked items, follow the instructions. Before Trouble microwaves malfunctions unplug the unit.

First check fuses. Blackening or burnout of the filament inside the channel speaks of failure. In this case, the device is replaced with a new one.

The noise or hum may mean capacitor breakdown. Is working properly, check by connecting the ohmmeter to the device and make sure whether the needle is deflected. If not - it is the output signal of the system and the need to replace the item. Before replacing the discharge device.

If heated condenser, the fuse blows and the technique is based on a strong rumble - a problem in high-voltage diodes and should be replaced.

Fault magnetron results in insufficient heating of food. This is due to the generation of poor high-frequency electric field. The consequence of failure are excess fat, food, snuff, cracks on the device. Check element can ohmmeter - capacitor and the body should not call each other. Faulty part replaced by a new one.

The device is not activated

The reasons that the equipment does not start:

• Network congestion due to multiple connected appliances to a single outlet. You just need to disable the most powerful units.
• There is no contact in plug connectors, there is a problem with the power cord. It is necessary to test the resistance of all cable conductors, and note whether it is changing at a bend. If it is not zero, replace it.
• Burnout one of the two fuses. This occurs when the circuit or mains voltage jumps. Replace the part.
• Breakage of a DIP switch or latch responsible for blocking the door and its tight closure.
• Replace microswitch or latch.
• Faulty thermostat (thermal fuse) - will need to complete replacement.
• Problem Management module. Its failure can speak only after the diagnosis of micro-switches, as well as separate modular buttons do not work. It requires complete replacement of the card.

The periodic switching on and off the furnace

If the equipment itself off, and after working in the former regime, the problem is caused by overheating.

In the microwave fails, the thermostat switches off because:

long-term operation at full power;
inadequate ventilation or excessive external temperature.

Lack of lighting

A blown lamp. Backlight needs to be replaced. If that fails, the problem associated with the chain turning the lamp - there is no contact.

Sparks and burning smell

Arcing in the microwave is dangerous because technology can ignite. There is a number of reasons:

• When using dishes with metallized elements. Excluded from the operation.
• The breakdown of the dielectric window.
• Faulty ceramic holders. The technique can puffed. Clean dirt, grease and grime.

In operation may also smell of burning. Do not panic and think that the microwave was completely burned beyond repair.

The causes of odors:

• Circuit in the high voltage transformer. Replace it.
• Mains overvoltage. Replace fuses and turn on the microwave only within the normal voltage.
• The breakdown of the magnetron capacitor. Replace it and make sure that the wires are well insulated from the body of the magnetron.

enamel defects

With the destruction of enamel coating on the door arcing occurs. Paint thin layer of lacquered ink or enamel damaged zone.

Heating function does not work

The fact that broken microwave and indicates poor heating food. This occurs when the interturn fault. It is provoked breakage of high-voltage winding of the transformer or breakage. Resistance Deviation - 150 ohms.

Another reason - the breakdown in the capacitor. Resistance level - less than 10 ohms. If there was a failure of the diode, it will attest to the resistance close to zero. The apparatus may be difficult to heat and magnetrons burnout, melting of its cap. Replace them.

No display

If you have problems with the display data may be missing or not fully reflected. The display may freeze or fade due to a malfunction of the processor or the screen. Microwave oven can not be switched if they are not replaced.

The tray is rotated with difficulty or not at all turns

The reasons that a pallet has ceased normal spin:

• fault coupler;
• problems with the gear - tray does not rotate;
• too great size or weight of product.

Do not work on the panel

Touchpad needs to be repaired, if the buttons are no longer functioning. Broke track conducting current. Replace or repair the wire panel.

Excessive noise, hum during operation

The noise, the hum and buzz are due to:

• Interturn fault in the transformer.
• Loose winding of the transformer. Mount the wooden peg between the coil winding and the yoke.
• A bad fan. Replace it.

The device does not turn off

If the microwave does not terminate at the end of the cycle timer:

• Reloading the microwave chamber. Empty the oven and increase the cooking time.
• Thermal fuse blown contacts or it broke.
• The control module or the card is not working. We have to replace the furnace.

Faulty timer

If not running timer broke off one of the gears in the gearbox. It needs to replace the device completely.
Another reason - has broken the motor timer. The element must be replaced.

good advice

To the microwave oven is working properly and did not allow failure, it is better initially to properly handle it:

• Never use metal utensils to heat food.
• The error is the use of the empty chamber art.
• It is impossible to heat the liquid products in the clear - cover the dish.
• Worn parts microwave change in time.
• Pay attention to clean the oven.
• To keep control of voltage drops, buy an uninterruptible power supply.

Observe the repair of microwave ovens:

• The magnetron can not be started when the door is closed or badly damaged waveguide.
• Disconnect the oven from the network at the time of repair.
• Components must be replaced identical, so that they match specifications.
• If the fan does not start the oven.
• Watch for a properly grounded before switching.
• In the diagnosis of the chamber must be water glass.

Typical failures microwave works are due to improper use. Perform preventive maintenance and clean from dirt. Follow the guidelines carefully and treat it - the probability of breakage decreases.