The microwave is not heating up, what s wrong?

The microwave oven is functioning normally, but the food is not heated, and one of the magnetrons, transformers, grounding bidirectional tubes (high-voltage diodes) and high-voltage capacitors in the furnace is broken. The possibility of the damage of the magnetron and the grounding two-way tube is greater, and the decrease in capacitance capacity will also lead to the furnace not heating when working, if you have the ability to disassemble and inspect yourself, first use the universal meter 10k high-voltage diode, one direction is not passable, the other direction is about 30 40k (not uniform), if it is normal, it is the magnetron Take the bad one to the home appliance accessories store (you can also call them to check) to buy a new one and install it back. It is difficult to judge the decrease in capacitance capacity because there is no capacitance meter, so it is better to take the magnetron and high-voltage diode to the city together, find a reputable repair shop or home appliance accessories store, explain the situation to them, and ask them to judge that it is broken for you, buy a new one and go back and install it.

In the meantime, it is also necessary to check whether the small fuse tube is burned, and the supplies that should be repaired should be replaced.

If you can't turn food in the microwave? That could be 1, the door is not closed properly 2, and the pallet motor is broken.

If the pallet motor is broken, the tray is generally glass, and there is a rubber similar to a petal type under the tray, and the tray motor is connected under it. Take off the tray and turn on the microwave to see if it turns. If it still does not turn, then it is recommended that you find a professional to replace the pallet motor.

The microwave oven case needs to be opened, and if you are not a professional repairer, it is recommended that you do not open it yourself.

Check to see if there is a power outage.

No response? Broken? Is the plug plugged in? If the microwave oven is broken, take it to repair.

Let's see if it's adjusted to the low temperature, and the power supply is loose!

It's time to change, it's not heated, and it's better to change it.

Reasons why the microwave won't heat up:

1. The low-voltage fault is generally due to the problem of the low-voltage power supply line, and the 220V AC voltage is not sent to the high-voltage transformer or frequency conversion board, and then the high-voltage local does not work and does not heat. The low voltage is mostly caused by damage to the timer (mechanical microwave oven) or computer board relay damage (computer microwave oven), and a small number of microwave ovens are caused by micro switches.

2. High-voltage faults are generally caused by three major components, high-voltage diodes, magnetrons, and high-voltage transformers. Depending on the brand and the length of use, there are differences in the probability of damage to the three major components.

1. It may be that the voltage is too low, when the voltage is lower than 187V, it will cause the microwave oven not to heat, and the microwave oven must be higher than 187V to work normally, the solution is to avoid the peak period of electricity consumption, or replace the transformer. First unplug the power plug, remove the cover and discharge the capacitor, remove all the leads of the primary and filament of the main transformer, remove the mounting bolts that fix the transformer from under the chassis, then take out the transformer, reinstall the new transformer, and test the machine to check whether the fault is eliminated.

2. It may be that the high-voltage diode or high-voltage fuse is broken, and replacing the new high-voltage one-way diode and high-voltage fuse can generally solve the problem of microwave oven not heating. The fuse of the induction cooker is located at the bottom between the transformer and the fan, remove the fuse with the plastic casing, and replace it with a fuse of the same specification for test operation.

3. If the microwave oven is turned on but not heated, it may be caused by the aging of the magnetron and the fracture of the filament, and the test filament winding is normal to 0 ohm, if it is not so, it means that the magnetron is broken and needs to be replaced with a new magnetron.

Microwave oven is a good tool, one of the most convenient household appliances to use, not only the frequent use of many offices will be in place, the company will even prepare a few, and the most basic and most commonly used function is of course to add food, a qualified microwave oven can be used for more than 10 years, of course, it will be used for 10 years, and the answer will definitely encounter some fault problems, such as the most common problem is not heated, losing the most basic function, how to get back to the old thing? What to do? Without further ado, let's find out why.

1. When the voltage is too low, when the voltage is lower than 187V, it will cause the microwave oven to not heat. Because the microwave oven must be higher than 187V for it to work properly. Solution: Avoid peak hours when using a microwave oven, or replace the voltmeter.

2. The battery capacity is insufficient, so that the microwave oven does not heat. Workaround: Charge the battery, or replace it with a new one. What to do if the microwave does not heat.

3. The high-voltage transformer is damaged, and the light is on after the microwave oven is turned on, but the turntable does not move and cannot be heated, it is likely that the high-voltage transformer is broken. Solution: Replace the high-voltage transformer.

4. The high-voltage diode is damaged, and after the microwave oven is turned on, the light is on, and the turntable is moving, but it just can't be heated, and it is likely that the high-voltage diode is broken. You can see if the high-voltage diode is normal, if the result is infinity, it means that the high-voltage diode is broken. Workaround:

Replace the high-voltage diode directly.

5. The second door interlock switch is damaged due to frequent operation, poor contact, and electric shock destruction, resulting in the 220 volt working voltage can not work normally, resulting in damage to the door interlock. Solution: Check whether the fuse is blown first, if there is no fuse, then see if the monitoring switch is normal, if the monitoring switch is normal, it means that the interlock switch is broken, and replace the new door interlock switch.

6. If the magnetron is damaged, the microwave oven boot light is on but not heated, which is likely to be caused by the aging of the magnetron and the fracture of the filament. Solution: Test the filament winding, the normal is 0 ohms, if not, it means that the magnetron is broken and needs to be replaced with a new magnetron.

Finally, there are some precautions and contraindications when using the microwave oven

1. Avoid using ordinary plastic containers: first, hot food will deform plastic containers, and second, ordinary plastics will release toxic substances, pollute food, and endanger human health.

2. Avoid using metal utensils: because the iron, aluminum, stainless steel, enamel and other utensils put into the furnace will produce electric sparks and reflect microwaves with the microwave oven when heating, which will not only damage the furnace body but also cannot heat the food.

3. Avoid using closed containers: Wide-mouth containers should be used when heating liquids, because the heat generated by food heating in closed containers is not easy to dissipate, so that the pressure in the container is too high, which is easy to cause blasting accidents.

4: Avoid using bottled food with a narrow bottleneck: even if the lid is opened, it will swell due to pressure, resulting in **.

5. Do not use half-full bottled baby food or original bottles to heat in the oven to avoid bottle breakage.

The microwave oven does not heat up because it is not energized, the magnetron is burned, the operation is incorrect, the magnetron transformer is burned, or the magnetron high-voltage fuse is burned. Microwave ovens are common household appliances that are very convenient to use. However, you may think that there will be some failures after a long period of use, and the more common fault is that the microwave oven does not heat.

First of all, check if the microwave oven has a normal power supply. If the power supply is normal, you can open the case of the microwave oven and check whether the fuse in the machine is blown out. If the fuse is normal, it may be because the secondary circuit of the transformer is faulty, and it is necessary to check whether the high-voltage diode and magnetron are normal.

Check whether it is a high-voltage capacitor, high-voltage diode or magnetron one by one, the temperature in the microwave oven is too high and the cooling fan is not working, which will also cause the microwave oven to fail to heat. This kind of problem can be repaired by a professional maintenance personnel, because the equipment in the microwave oven is more complicated. When you carry out maintenance by yourself, you must first cut off the power to avoid safety accidents.

MicrowaveNot heating, it may be due to the following reasons:

1. Possible plugs, sockets, power cordsPoor contactor disconnected, the faulty part needs to be replaced so that it is in good contact.

2. PossiblyThe fuse blows, need to be disassembled, replaced with a new fuse.

3. If the furnace door is not closed properly or the double locking switch fails, the furnace door should be closed again or the switch should be repaired.

4. Thermal relayThe circuit is disconnectedThe air cooler needs to be inspected and replaced if damaged.

5. Temperature control knob orTimerThe knob is in the stop position and should be readjusted to return it to its normal state.

6. If it is found that the power transformer high-voltage winding, high-voltage capacitor, rectifier diode and magnetron are damaged, they should be replaced.