It’s normal for dishwashers to make noise when they run, but there is a difference between a normal sound and an incredibly loud sound. Strange buzzing sounds are definitely not usual, so it’s important to find out what the issue is. It might just be an easy to fix problem, but if it goes on too long, the expense will quickly add up.
After a few cycles on the dishwasher, the water coming out may start to make a buzzing sound. This is normal. However, if the noise starts to sound less like buzzing and more like a banging sound, then the following could be the cause:
Spray Arms Is Hitting Dishes
If your dishwasher making loud buzzing noise, the most likely cause is that the spray arms are hitting the dishes. To fix the issue, rearrange the dishes to make more space and give the spray arms more room to move. If you’re hearing a non-rhythmic sound, you might want to contact an expert. You’re probably experiencing water hammer, and that’s an issue for the pros.
Clogged Pump Intake
A dishwasher’s pump intake is usually good at collecting food chunks and other pieces of debris. It can’t usually make any noise, but if a glass breaks and some shards get lodged in the pump intake, then it could be making a loud grinding or buzzing noise.
If you notice a buzzing noise coming from your pump, that’s likely because it has accumulated hard plastic pieces. Clear them out by opening the pump intake and giving it a good scrub.
Dry Pump Seals
Did you hear your dishwasher making a buzzing sound? If so, it’s probably because the seal is dry. Under normal and consistent use, the seal becomes lubricated with water.
When you first buy a dishwasher, it may make buzzing sounds. This is caused by the dry pump seal, which warms up and becomes lubricated with water. The noise will not occur until the appliance is run with water. To fix this issue, pour 1 quart of water into the bottom of the dishwasher.
When loading the dishwasher, you should always use cups and containers of similar shape, size, and material. The load should be evenly distributed so dishes don’t clash together. When loading your dishwasher, make sure there are not any plastic cups or containers near one another and make sure your dishes are arranged in a way to avoid rattling.
If you think something is causing noise, test it by running the dishwasher when it’s empty. If the sound continues after, it’s not the fault of your dishwasher.
Dishwasher Parts are Damaged
Dishwashers make a humming or buzzing sound, which is actually a sign that the appliance is working correctly. Dishwashers are not specifically designed to be silent. It is possible for dishwashers to be quieter than others, but this is not their main purpose.
Your dishwasher’s buzzing sound is a good sign. These sounds, from the fan that cools the motor, the soft-food disposer, and the drain pump, are a sign that the machine is working correctly.
Dishwashers are not known to be especially loud, but after a few years, all the components gradually wear out and become louder. If you want to keep your home peaceful, you should replace these components. It is recommended that you either replace the fan, food disposer, and drain pump. If these parts are replaced, the dishwasher will be quieter. The alternative is to purchase a new dishwasher.
Hi there! I’m Sam Hendricks, and I’m a repair technician and expert. I created this website to help people like you save money and time by fixing your own appliances.
Over the years, I’ve seen people spend a lot of money on unnecessary repairs or replacements. That’s why I decided to share my expertise and create easy-to-follow guides for fixing appliances on your own.