Microwave makes popping noise when starting

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My Microwave Is Sparking My Microwave Won't Heat Up Why is My Microwave Making a Clicking Sound Why is My Microwave Making a Buzzing Sound

My Microwave Is Sparking

If your microwave starts sparking, switch it off and unplug it immediately. It’s possible that there may have been previously unseen incidents of sparking before, and there may be burn spots, so it’s important to get it fixed otherwise a fire might break out.

Basic Checks

Check the microwave for metal fragments that may have crept in – wire wool fragments from cleaning, for example, or even foil from a previous microwave cooking faux pas.

It’s possible that some paint may be chipped, in which case repaint it with microwave-safe paint.

Microwave shelf supports and hangers often come loose and can cause sparking. To prevent this, it’s advisable to use a microwave shelf only when necessary. To fix them, replace the supports and repaint any metal that has become bare with micro-safe paint.

If the waveguide cover is damaged, you will need to replace it. Damage will most likely have been done to the microwave ceiling and walls, so you’ll need to repair this too.

Faulty Magnetron

If sparking is coming from inside one of the side walls of the microwave, the magnetron is likely to be faulty.  Replacing the magnetron should only be carried out by a qualified repair engineer.

Other Causes

Many more minor problems can also cause microwave sparking, for instance burnt-on food or food prepared in certain specific ways (the classic example is a grape cut almost in half, but there are many ways you can create a hazard with food in a microwave). If this is the source of the problem, you might not need to take any action at all.

My Microwave Won't Heat Up

Problems with no heat from a microwave are most likely to have originated with a defective high voltage diode, high voltage capacitor, faulty door switches, or the magnetron itself.

You should be extremely cautious about removing any covers on a microwave oven without sufficient knowledge of the high voltage system within.

Why is My Microwave Making a Clicking Sound

It's easy to get used to the convenience of just popping leftovers in the microwave for a quick re-heat. But it can be worrying if your microwave begins to make a strange clicking noise. It's a common problem, with a variety of causes – here are some of the most likely reasons for a clicking microwave.

Magnetron Tube

If your microwave is loud, noisy or making unusual clicking sounds, it could be a result of a defective magnetron tube. The magnetron tube uses high voltage, high current DC power that generates the microwave frequency, which cooks the food, and is meant to be nearly silent.

If it's burnt out or damaged, it can emit a high-pitched, growling or clicking sound. It's not generally dangerous to use the microwave if it starts making these noises. However, it is a warning that the magnetron is on its last legs and needs replacing as soon as possible.

Fan Motor

A noisy or clicking microwave could also be an indication that the stirrer motor has worn out. The stirrer is a metal blade that slowly turns around to deflect microwave energy to a random pattern inside the microwave itself. As it nears the end of its life, it starts to make unusual grinding and clicking noises. Without the stirrer, the microwave won't heat food evenly, so it should be replaced.

Turntable

A noisy microwave could also be a sign that the turntable motor or turntable rollers are wearing out – a common problem with microwaves, which is easy to replace.

Why is My Microwave Making a Buzzing Sound

It can be a little worrying to hear a strange buzzing noise, whilst microwaving you dinner, but it's a common problem. Here's how to spot the fault and get your microwave working perfectly again.

High Voltage Component Failure

If your microwave is making a buzzing noise or a loud humming sound, it's likely that a high voltage component has broken or failed – often the magnetron, diode or wave guide.

The magnetron tube emits radiation from the microwave, which heats the food and normally doesn't make any sound at all. A buzzing sound is a good indicator that it's wearing out or already broken.

If your microwave is making a crackling noise when not in use, you should find out whether you need repairs. Several reasons exist that cause even the finest OTR convection microwaves to make weird noises, so consider each of these common problems. While you determine which reason applies to you and whether you can repair it yourself, consider whether the risks outweigh the savings. The best microwaves require less upkeep, and you should not take on any projects with which you are uncomfortable. If you think your turntable motor could be causing the noise, take a look at how to replace the microwave turntable motor.

KEY TAKEAWAYS:

• Never use a microwave with sound or light arcing.
• Popping, buzzing, and humming noises occur as a result of the types of food items you prepare or food spills.
• Do not try to repair anything that you aren’t sure you can repair.

Common Microwave Noises

You may notice your kitchen appliance making noise occasionally, whether it’s a microwave or fridge. Generally, these noises occur regularly and result from the operation of the device. However, you may want to find out what causes each noise, especially if you notice a new noise. You should reach out to a repairman if you experience loud noises or your microwave makes noise when you aren’t using it, such as the fan turning on when the microwave door is opened. Some common sounds that microwaves make include humming, buzzing, clicking, popping, or arcing. You may also be interested in “How do you Open a Sealed Envelope in the Microwave?”

Insider Tip

Cleaning your microwave, including the track and roller ring for your glass plate, helps reduce clicking noises.

Humming and Buzzing

Most sounds like humming or buzzing often result from the oscillation of its magnetron, the vent fan, fan motor, or any combination therein. Over time, this normal operation noise increases gradually. The oscillation occurs as the microwave oven heats, and the fan helps prevent overheating of mechanical components. If your microwave becomes significantly louder over a short period, you may need repairs. To check whether your issue comes from the magnetron, try running it on a lower power setting with food inside, causing it to turn on and off to maintain the desired temperature. The noise should be quieter if the problem is the magnetron.

Clicking Sounds

Your microwave may not contain a rotating plate, but some microwaves operate using a glass turntable or plate to rotate the food. This piece helps to maintain consistency in heating throughout your meal. However, this action can cause clicking sounds occasionally. Check whether your glass plate, roller ring, or track needs to be cleaned if you frequently hear clicking. You easily wash these with soap and water, and you just may have forgotten to do so. The other option falls under the positioning of the plate, so check to see if the plate remains on track.

Popping

You may describe the noise of your microwave as a popping noise, crackling noise, or snapping noise as you prepare food or after spilling food. However, these tones often result from the high water content or high-fat content of foods, especially sauces. Microwaves heat their contents through the use of microwave frequencies on water molecules inside the food, so this type of noise should be familiar. You test this element by cleaning the microwave completely and letting it dry. Then, take a bowl of water and run the microwave with the bowl inside. Contact a service center if you still hear the popping.

Electric Sounds

These types of sounds remain the most concerning when it comes to microwaves or other appliances. Typically, you hear buzzing, humming, and popping sounds frequently while running your device. However, if the product begins to emit an electric type of sound, called arcing, you replace your microwave. In addition to the sound, you may notice that your microwave energy flashes while in use. If this happens and you see a hole in the side or back of your microwave, stop using it because it has become dangerous.

Warning

Arcing in your microwave is dangerous, and you should contact a support center if you notice it.

F.A.Q.S

Why does a microwave oven plate make noise?

Microwave plates may need to be cleaned or realigned if they make noise while in use. If you hear a cracking noise from the plate, stop using the microwave.

Should a microwave be used if the outer glass is broken?

No, you should not continue using your microwave if there are holes in it. You should also unplug the microwave to ensure the capacitor is disconnected.

What does electrical arcing sound like?

Electrical arcing sounds similar to static on the TV, and it’s a pretty distinct sound. It sounds like exposed electricity.

STAT: If it is happening frequently, the track and roller ring may need to be cleaned, or positioned correctly. (source)

Why does my microwave pop when I turn it on?

What does a faulty magnetron sound like?

Why did my microwave pop and turn off?