Dishwasher Making High Pitched Noise? -Top 5 Causes

Your dishwasher making high pitched noise and you can’t stand it anymore. This article will explore the causes of this noise. There are several reasons for this, but they can be broken down into two categories: mechanical and electrical. Mechanical causes of noise include worn-out parts like a belt, fan, and pulley. Electrical causes include a faulty heating element or a faulty motor.

Sometimes dishwashers create a high-pitched noise, which is often due to a weak water pump. The pump may need to be replaced due to wear and tear. A possible reason for the high-pitched noise is clogs or residue build up in the water circulation system. The cause of the noise is usually that the bearing of the pump wears out and needs replacing.

There are a few things you can do if your dishwasher is making an annoying noise. If it is still under warranty, the manufacturer may be willing to repair the appliance. If the appliance is old, replacing the pump is generally an easy fix. Here are a few steps to make your dishwasher work like new again without the annoying noise.

Faulty Motor

Determining whether or not the noise you heard is coming from your dishwasher means examining underneath it to see if the noise is coming from the pump. Simply open the door and look for a pump located near the door. It can sometimes be difficult to identify the dishwasher’s noise. The pump supplies the machine with pressurized water, which then flows into the spray arms.

Water is leaking! And the main culprit might just be your impeller seal. This little seal makes sure water doesn’t get into the motor and ruin it, but over time it’s possible the seal fails and the bearing grease wears away. If this happens, you need to replace the motor right away. Luckily for you, most major brands have motors available online or in your local store. If you need to replace the motor on your dishwasher, contact the manufacturer.

Check the bottom of the dishwasher for noise. If the motor is old or it was incorrectly built, the slinger could break off and spin around the shaft. To see if this is the case, use a flashlight to inspect the motor and pump housing. If the slinger is broken, you have to replace the motor.

Remove Debris

Sometimes, an object like bone, food, or broken fish will get stuck in the dishwasher. When this happens, the pump makes an annoying noise. First, open the dishwasher pump by removing it from the motor. Inspect for debris. If the pump is dirty, clean it and the high pitched noise should stop. Otherwise, there might be something wrong with the pump and you will need to replace it.

Worn Out Bearings

The pump motor is a common cause of noise in a circulation system. When the bearings wear out, the noise gets worse. In most cases, the noise becomes noticeable after years of use, but it’s not unusual for them to come early on.

When the bearings wear out, they can generate a continuous, high-pitched noise. This is not normal. To get rid of the noise, replace the bearings if you have that option on your dishwasher model. But if you cannot replace them, you will have to replace the circulation pump.

Faulty Water Inlet Valve

Dishwashers often make loud High Pitched Noises, but it’s hard to tell what’s causing the sound. Faulty water inlet valves are the most likely culprit. And, of course, it’s hard to know that without first removing the valve from the dishwasher.

Checking the inlet valve of a dishwasher is a great start. To do this, unplug it first, then remove the front plate and locate the valve. Check that there are no kinks or restrictions in the hose connections. If there are, tighten the hose connection and replace any kinked hose.

Unplug the wires from the valve. Most dishwashers will have two or four wires connected to the inlet valve, so beware not to confuse them as you replace the valve. Label the wires before unplugging.

To test a solenoid valve, touch one probe of a multimeter to a terminal on the valve. If the multimeter reads 0 ohms at this setting, then the valve is functioning properly. If the reading doesn’t change or shows a reading of 2, you will need to replace the valve.

If you are looking to buy an inlet valve for your dishwasher, there are a couple different options. You can order it online or buy it at your local parts store. When ordering the part online, be sure to take note of your dishwasher’s model number so you don’t buy the wrong one.