Washing Machine, Dishwasher, Cooker, Oven, Water Dispenser, Fridge, Tumble Dryer Installation, Repair and Maintenance Tips & Tricks Articles

Why Are There Sparks in my Microwave?

Learn more about how to work with your washing machine, cooker, oven, dishwasher, refrigerator and other home and office appliances

If you witness sparks appearing in a microwave it can be a rather alarming sight.

However, the first thing to do in this situation, is not panic. This problem is usually relatively easy to fix if you can find the cause.

Sparks in the microwave are usually caused by the microwaves hitting a metal object inside the appliance. Metals conduct electricity with lots of electrons which move freely.

Microwaves are absorbed by fat and sugar in foods. If metal is put into the appliance, the microwaves cause the electrons to move around, producing sparks and heat.

Sparks occur simply due to a build-up of charged particles which produce a concentrated electric field at the edge of the metal object.

Read on to find the most common causes of sparks in a microwave and what to do in this situation.

Metal in the microwave

The mistake of putting a cup of coffee with a spoon into the microwaves. Metallic objects cannot be put into these devices.

It is important that in all cases when sparks are sighted inside your appliance, that the device is stopped, and the power is turned off. This will prevent further damage and help to prevent a fire breaking out.

In most cases where sparks appear in the appliance, it is likely because you have accidentally left a piece of metal in the microwave.

When the appliance is working, this will cause sparks to fly, and the metal should be taken out as soon as possible. If removed quickly enough this can usually prevent damage such as holes being burnt into the walls.

However, it is a good idea to get your appliance checked by a professional microwave repair technician before using it again.

Other metals that can cause issues in your microwave are foil or crockery items with metal trim – both of which should be avoided.

Broken microwave waveguide cover
In rare cases, if the microwave oven receives a lot of use, or is bashed or knocked, the waveguide cover – which allows energy waves to cook through your food –  in the device may become loose.

In addition, if food explodes inside the machine, something can become trapped under this cover and get into the inner workings of the microwave.

If this happens, then sparks can occur, and this should be looked at by a repair professional who can get the device running again, while keeping your home safe.

Faulty diode

Girl cleaning oven in the kitchen

A microwave diode is an essential part of your device and is used for generating, mixing, detecting and switching your microwave signals.

As they are heavily used, they can occasionally be worn down or split in two. This can then cause sparks, and if the diode has shorted, it will be accompanied by symptoms such as a loud humming.

If the diode is faulty but not shorted, no heat will be produced and there won’t be a humming noise. There can also be visual signs and a burning smell if a microwave has a faulty diode.

If either of these issues occur with your appliance, then it means that a microwave diode will need to be replaced by a professional

For more information on how to keep your machine running correctly, you may want to refer to our article on how microwaves work.

If you need further assistance with your appliance, don’t hesitate to get in touch with us as we are always delighted to help!

Home Appliances Blog

Learn more about how to work with your washing machine, cooker, oven, dishwasher, refrigerator and other home and office appliances
Borehole Drilling in Kenya | Dial 0722466901

Borehole Drilling in Kenya | Dial 0722466901

Borehole Drilling Services in Kenya Get high quality borehole drilling services at affordable rates …

OUR WASHING MACHINE REPAIR SERVICES IN NAIROBI

OUR WASHING MACHINE REPAIR SERVICES IN NAIROBI

WASHING MACHINE REPAIR IN NAiROBI We provide repair services for all kinds of washing machines. Enjo…

WASHING MACHINE KEEPS DISPLAYING ERROR CODE

WASHING MACHINE KEEPS DISPLAYING ERROR CODE

Older washing machines never used to be as hi tech as the ones we find today, nor did they have the …

WHY HAS MY WASHING MACHINE HAS STOPPED FILLING WITH WATER

WHY HAS MY WASHING MACHINE HAS STOPPED FILLING WITH WATER

When a washing machine is not filling with water it is usually an indication of a problem with the w…

WHY IS THE WASHING MACHINE NOT CLEANING CLOTHES PROPERLY ?

WHY IS THE WASHING MACHINE NOT CLEANING CLOTHES PROPERLY ?

There can be nothing more frustrating that getting your clothes out of the washing machine to find t…

WHY IS WASHING MACHINE DAMAGING MY CLOTHES

WHY IS WASHING MACHINE DAMAGING MY CLOTHES

The majority of instances when a washer is damaging your clothes it could be down to improper use of…

WASHING MACHINE IS NOT DRAINING THE WATER

WASHING MACHINE IS NOT DRAINING THE WATER

If a washing machine is not draining the water there is a handful of issues it could be. If a machin…

THE WASHING MACHINE IS NOT HEATING THE WATER

THE WASHING MACHINE IS NOT HEATING THE WATER

Typically you might expect to feel the warmth of a hot wash through the glass door of a machine but …