Full Answer
Is it possible to fix a broken magnetron in a microwave?
The magnetron can malfunction even in the best microwave ovens, but as long as you follow some safety guidelines carefully, it’s a fairly easy fix, just like repairing microwave rust. But, the bigger question is whether it’s worth the trouble and cost.
What can I do if my magnetron connector is damaged?
Use light-grade sandpaper – do not use steel wool. If there is evidence of poor terminal connections (i.e., discoloured, burned, pitted connectors), repair or replace the slip-on connectors on the filament leads If possible, perform an RF leakage check around the magnetron
Is it cheaper to replace a magnetron?
The cost of replacing a magnetron is usually as much or even more than the cost of buying a new microwave, which makes it an impractical option instead of replacing the whole oven, most of the time. How long does a magnetron last?
How do I know if my magnetron is faulty?
If the temperature doesn’t increase by at least 35°F (19°C), then the magnetron may be faulty and you will have to replace it. Warning: The glass and water will be extremely hot when it’s finished in the microwave. Use caution when you grab the glass and be careful not to spill. Unplug your microwave.
Is it worth replacing a microwave magnetron?
No matter how new your microwave or if there's only one problem, if the magnetron is out then you might as well replace the entire appliance. The magnetron is the heart of a microwave that actually makes the micro-waves. Replacing it is about equal to the cost of buying a whole new microwave, sometimes even greater.
What causes a microwave magnetron to fail?
The most common cause of an overheating magnetron is when too much energy is reflected back into the device. This can happen when you run your microwave empty (something you should never do), or if the turntable has been removed.
Are microwaves worth repairing?
If your microwave is relatively new and the repair costs less than replacing it, the fix is worth it. But are microwaves worth repairing if something major is broken? Probably not. Consider getting a replacement appliance for about $100, which should work for 7 to 10 years.
How long does a microwave magnetron last?
Although the average life of a magnetron tube is 22 years, a number of factors can cause that number to diminish and for the microwave oven to lose power more quickly.
How do I know if my magnetron is broken?
1:522:22Microwave Magnetron Test - Good vs Bad - YouTubeYouTubeStart of suggested clipEnd of suggested clipTest set it to sound. When you test the old one the bad one your that we're getting continuityMoreTest set it to sound. When you test the old one the bad one your that we're getting continuity between the case in the terminal. On the new one we're not getting anything that's the way it should be.
How do I know if my microwave magnetron is bad?
A noisy humming or vibrating noise can mean you need the magnetron tube replaced. An abnormal clicking sound can also be a sign of a bad magnetron. A grinding or groaning sound can signify a problem with the turntable roller guide or turntable drive motor. Grinding can also mean there's a problem with the stirrer motor.
How much to replace a magnetron in a microwave?
The average cost to repair a microwave is about $150, including labor and parts....Microwave Repair Cost by Type of Repair.Repair TypeCost RangeMagnetron$100 – $200Diode$55 – $125Glass Tray$80 – $160Light Bulb$55 – $1204 more rows•Jan 11, 2022
Why is my microwave running but not heating?
If your microwave isn't heating, first check it's not because of a setting (timer, low power). Switch on/off and test again with water. If it's still not heating, common issues are door frame switches, high-voltage diode, or the microwave's magnetron. If you're not qualified, check with a professional.
Is a 5 year old microwave worth repairing?
Our survey results suggest you might consider repairing a broken microwave in that price range if it's still on warranty, and consider a repair if it's two years old or less, but you'll definitely want to replace it if it's three years old or older.
What is the life of magnetron?
Magnetron tubes have a lifetime of only a few thousand hours—from 2,000 hours up to 8,000 hours depending on the tube.
Should you replace a 20 year old microwave?
Should I replace my 20-year-old microwave? If your microwave works, keep using it and keep it clean. Three things could go wrong, but they are all rare – especially for a 20-year-old microwave. The door or seal on the door could break and microwaves would leak into your kitchen.
What is the average life expectancy of a microwave oven?
The average microwave oven lasts about seven years with normal use, and even less with heavy use and poor maintenance. A large family may find themselves replacing their appliance every four to five years as they become more reliant on its use to heat up snacks and leftovers, or to defrost meals.
How much is a magnetron for a microwave?
Cost of Magnetron Replacement The magnetron in your microwave is the power source for your appliance. Replacing it costs approximately $100 to $200. A microwave magnetron price is around $50 to $100, and labor is about $50 to $100.
What causes microwave transformer to burn out?
The most common reason why transformers explode and burn is accidents caused by lightning strikes. Lightning strikes can often damage the wiring and transformer equipment.
How do you diagnose a magnetron?
Look at the multimeter's screen and take note of the reading. If the resistance stays below 1 ohm, then the electric filament inside the magnetron functions properly. If you get a higher reading or if the screen reads "OL", then the magnetron is faulty and should be replaced.
What causes a magnetron magnet to crack?
Cracked Magnet(s) This is caused by the magnetron over heating, some instances this is because of reflected microwave energy. Solution: Replace the magnetron and check why the magnetron has overheated.
Why does my magnet crack?
Cracked Magnet (s) This is caused by the magnetron over heating, some instances this is because of reflected microwave energy. Symptoms: Weak or no heat, magnetron gets extremely hot (overheats), intermittent arcing or “snapping” sound. Solution: Replace the magnetron and check why the magnetron has overheated.
Can magnetron fail?
The magnetron can fail in several ways, many of which produce obvious visual symptoms that can be seen and require no testing with a meter. Components in a magnetron. When the magnetron must be replaced, here are some Magnetron Replacement Considerations.
How to tell if magnetron is faulty?
Sounds like the magnetron is faulty. Remove it and use a multimeter to test between one pin and the body and then also test from the second pin to the body of the magnetron. If there is resistance , change it. They are cheap on eBay . The fuse from the large capacitor to the large transformer is usually blown as well. Good luck
What happens when magnetron gets hot?
When the magnetron gets to hot, it shuts off power to the device. Some of these fuses reset once the device cools, some don't. Sounds like you have one of the later. You can replace the fuse, temp rating is usually written on the device itself.
How to check if a capacitor is good?
Check the capacitor, it should measure 10 or 20 Mohm as there is an internal resistor. Your measurement may start off at a high point and then climb down. That is normal. You can look up videos online on how to test the capacitor. If you have a capacitance setting on your meter, verify if it is within range specified on it. Finally make/buy a resistor divider to divide the voltage from 5000 or so volts down to something low that your meter can handle. Disconnect the magnetron and connect your divider with meter to the high voltage wires that used to connect to it. If you are getting high voltage and still no heat, its most likely the magnetron.
How to troubleshoot a microwave?
If you are getting power now start troubleshooting the high voltage side. Write down and mark where each high voltage wire goes and take a picture for reference. Disconnect the transformer and check to see if it is open or shorted on all windings. If that's not a problem, disconnect the diode, put it between a 9volt battery and your tongue to see if there is voltage going through. It should only conduct one way. You can also use a voltmeter and a 9volt battery to measure the voltage, will be much less. You cant use continuity testing on these diodes as their forward voltage is too high.
Is the magnetron inside the microwave clean?
The inside of the wave-guide, the motherboard, and the magnetron are surprisingly clean given the state the rest of device was in. Because the magnetron is the most expensive part in the microwave, I'm a bit hesitant to order one and try swapping it out.
How to test a magnetron?
TEST 1: Locate your magnetron and label each of the wires attached to it so that you know which wires are to be replaced where. Set your ohmmeter to the lowest resistance scale. Take a resistance measurement between each of the magnetron's terminals by touching each probe to one terminal each. Reverse the probes and take a second resistance ...
Can a microwave shock you?
CAUTION: Your microwave oven is capable of giving you a serious electrical shock, even when it is unplugged. We strongly suggest you seek the assistance of an appliance repair technician when conducting any microwave oven repair.
What temperature does a magnetron work at?
If the water temperature rose by 35–65°F (19–36°C), then your magnetron works great! If the temperature doesn’t increase by at least 35°F (19°C), then the magnetron may be faulty and you will have to replace it. Warning: The glass and water will be extremely hot when it’s finished in the microwave.
What is magnetron in microwave?
Learn more... A magnetron is the main component in your microwave that generates microwave energy and allows you to warm up and cook food quickly. Over time, your microwave may not work as efficiently or it could stop producing heat altogether.
How to remove a capacitor from a microwave?
Place an insulated screwdriver against the capacitor’s terminals to discharge it. Locate a small metal box near the back of your microwave that has a black cylinder sticking out from the side, which is the capacitor. Find the metal prongs that stick out from the end of the capacitor and have wires connected to them. Hold onto your screwdriver’s insulated handle and make sure you aren’t touching any metal. Slide the screwdriver next to the capacitor and press the metal part against the terminals. You may hear a click or snapping sound once you discharge it.
How to remove a microwave casing?
Look for the screws on the top, back, bottom, and sides of your microwave. Use a screwdriver with an insulated handle to turn the screws counterclockwise until they’re loose. Once you remove all of the screws, carefully lift the casing off of the microwave and set it aside.
How to unplug a microwave?
Never take apart or work on your microwave while it’s still plugged in since you could get shocked or electrocuted. Locate the plug for your microwave and disconnect it from power completely. If you have a microwave mounted over your stove, look inside of a cabinet above it for the outlet.
Why does a capacitor have a lightning bolt on it?
Sometimes, the metal box with the capacitor has the image of a lightning bolt on it to mark that it’s dangerous.
Do you need to remove the door on a microwave?
You do not need to remove the door or the button panel to access the magnetron. Organize the screws in small dishes for each side so you don’t lose them. Don’t touch any wires inside the microwave since they could possibly still have a charge. If you want, wear rubber gloves for an additional layer of protection.