How To Fix Microwave Doesn't Heat, Microwave Works But No Heat, Easy Fix

How To Fix Microwave Doesn't Heat, Microwave Works But No Heat, Easy Fix
#how #howto #fix #microwave #easyfix

this Microwave has no heat it doesn't heat water or food at all
the Microwave brand is LG Old Transformer style Microwave

the cause is the high voltage diode was burned that's why Microwave had no heat

to replace it you can find the same part number and order it from either Amazon or eBay or other electronics suppliers

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Microwave not heating

1-Diode

The diode converts the A/C power output of the transformer to D/C, doubling the voltage to nearly 5,000 volts. This high voltage powers the magnetron to heat the food. If the diode burns out, the magnetron won’t receive enough voltage to operate, preventing the microwave from heating. When the diode fails, it is often visibly burned out. Inspect the diode and if the diode is burned out, replace it. If inspecting the diode proves inconclusive, test it with a multimeter that uses a 9-volt battery or put a 9-volt battery in series with the diode. When the leads are reversed, the diode should only have continuity in one direction.

2-Door Switch

Most microwaves have three or four door switches. When the microwave door closes, the door switches actuate in sequence to ensure that the door is closed properly. If any of the door switches fails, the microwave will not start or heat. To determine if any of the door switches are defective, use a multimeter to test each of the switches for continuity. If any of the door switches does not have continuity,

3-Magnetron

The magnetron uses high voltage, high current DC power to generate the microwave frequency that cooks the food. If the magnetron burns out, the microwave won’t heat. The magnetron is not repairable—if the magnetron is burned out, you must replace it.

4-High Voltage Capacitor

The high voltage capacitor works with the high voltage diode to convert the output of the transformer to DC voltage and to double the output voltage. If the capacitor is burned out, the entire high voltage circuit will stop working properly, and the microwave won’t heat.

5-High Voltage Transformer

Microwave ovens produce a very high voltage in order to power the magnetron antenna, which emits the energy that cooks the food. When a high voltage transformer fails, it will usually arc and have a burning smell. (Warning: The microwave oven can store a lethal amount of electricity in its high voltage capacitor,

6-Thermal Fuse

The thermal fuse cuts off power to the microwave if the microwave overheats. To determine if the thermal fuse has blown, use a multimeter to test it for continuity. If the fuse doesn’t have continuity, replace it

7-Thermoprotector

The thermoprotector cuts off power to the microwave if it overheats. If the thermoprotector trips, the microwave won’t start or heat. To determine if the thermoprotector at fault, use a multimeter to test it for continuity. If the thermoprotector does not have continuity, replace it.

8-Main Control Board

The main control board might be defective. However, this is rarely the case. Control boards are often misdiagnosed—before replacing the control board, check all of the more commonly defective parts. If you have determined that all of the other components are working properly,

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[samyammm]

I know that he knows what he is doing after he lit his cigarette when testing the fuse😂

[WorldRandomVideos]

Please let's know if you need any help or questions or concerns will be happy to to answer 😊
Thank you so much and all the best 👍

[boreduser]

Thought you had to flip the diode on the tester to change direction of voltage flow??

[sargealnajar]

Fantastic video helped me to figure out my microwave thank you so much

[randallmacdonald]

I am extremely concerned about your method of discharging the capacitor. It would be best if you shorted out the LEFT (set of two connectors) to the RIGHT (set of two connectors). Shorting out one connector (inside the black circular collar) to the one next to it inside the SAME black circular collar is useless. There are a total of four connectors to that capacitor, two inside one black circular collar and two DIFFERENT connectors inside the OTHER black circular collar. But, you are right: it's very dangerous. If there is any voltage remaining in that capacitor and you make a connection to it directly or indirectly through you, you could end up getting killed.

[aliyusef]

Thank you so much 💓
Very helpful and excellent explanation 👍, your video help me how to solve my microwave 😀

[nightlore]

Microwave engineer training you need .. People PLEASE BE CAREFUL ....

[bhbae]

First you're not releasing voltage. You are releasing charge of a HV calacitor. And you were wrong in its way. You needed to contact the two pins of the capacitor with the plyer at the same time so it could make a closed loop.

[reggie]

No need for batteries to check a diode, with digital meter anode and cathode measurement or flipping positive and negative leads can tell you an open or shorted diode.

[chrismyers]

your meter has a test for diods right on it arrow with a line is the diod test

[IonIPopa]

The diode reads alot on one end and only 0.01 in the other. Still means it needs replacing?

[twinkie]

Discharged capacitor wrong, and tested diode wrong. Sounds like a bad magnetron. Shouldn't be that noisy.

[frankellard]

Did replacing the diode fix Ur problem or did it end up being the magnetron? Mine runs noisy but does not heat.

[catdogky]

3:00 If there WAS left-over voltage, what would happen when you touch those leads?

[maymer]

before instal the new one you show us testing using battries if it is good or not like wrong one doide?

[sajjad]

Where can I buy diode from?
Thank you great sharing 👍

[drunkchicken]

I'm scared to watch this since he didn't short the capacitor the correct way.

[mmabatho]

My two grill microwaves don't work the other one it's malfunctioning the door and numbers don't correspond. The other one does not heat😢

[minarouzi]

I changed diedo but still not heating. Any tips?thank you

[HazirHussain-pnfx]

I tired to check this and had no luck, once I put it all back together the microwave tripped off and now doesn’t even power on… what did I do wrong?