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Why Is My Whirlpool Dishwasher Making Noise?

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As familiar as some dishwasher sounds are, others seem unexpected or downright alarming. Why is my Whirlpool dishwasher so loud? While a low humming sound is part of normal function, louder humming could indicate a motor malfunction. Learn how to determine if your Whirlpool dishwasher making noise is part of business as usual or a cause for concern.

Troubleshooting a Whirlpool Dishwasher Making Noise

Our noisy dishwasher troubleshooting tips can help determine if what you’re hearing indicates normal function or a problem to be solved. But, first, here’s why some dishwasher noises seem so loud.

Why Is My Whirlpool Dishwasher So Loud?

As quiet as most modern dishwashers have become, some noise is still part of normal operation. A Whirlpool dishwasher making noise that’s louder in volume or different from typical operating sounds, however, could indicate a problem. The following tips detail how to distinguish normal and abnormal dishwasher noise and silence atypical sounds with the right fix.

noisy whirlpool dishwasher

Normal Whirlpool Dishwasher Noises

While it may seem as if your Whirlpool dishwasher is loud, some low-level noises are unavoidable as a dishwasher runs through its wash cycle. 

These sounds indicate normal Whirlpool dishwasher operation and aren’t a cause for concern:

  • Rushing water: These sounds are common as the dishwasher fills with water at the beginning of the wash cycle. 
  • Swishing: Swishing sounds may be heard as the spray arms rotate and expel water.
  • Humming: The drain pump typically makes a quiet humming sound as water is being drained.
whirlpool diswhasher is loud
Image from Whirlpool

Abnormal Whirlpool Dishwasher Sounds

A noisy Whirlpool dishwasher that makes unfamiliar sounds or noise that’s louder in volume is abnormal. These sounds may be accompanied by a Whirlpool dishwasher beeping and light flashing to indicate a malfunction. 

The following abnormal sounds should be addressed immediately:

  • Loud humming: A loud humming could indicate a motor or fan malfunction. If the humming occurs during the dishwasher’s drying cycle, it’s likely that the fan is the issue and may require replacement. However, if the dishwasher hums loudly throughout its wash cycle, it could mean that the motor is failing and requires a professional assessment.
  • Banging: Is your Whirlpool dishwasher making noise that sounds like loud banging? These sounds often indicate a water hammer. This situation occurs when the water inlet valve closes but continuing water pressure behind the valve builds, making a banging sound. To avoid damage to your home’s water pipes, a water hammer should be assessed and corrected by a plumber.
  • Squealing: Squealing sounds usually indicate a faulty water inlet valve. This valve opens and closes periodically, allowing water to flow to the dishwasher from your home supply. If one of its components malfunctions, the valve may make a squealing sound as it operates. A faulty water inlet valve requires professional replacement.
  • Grinding: These noises typically indicate an issue with the drain pump. A large or hard food particle may be causing a blockage or one of the pump’s bearings or impellers may be damaged. If there is no visible blockage in or around the drain pump, it should be assessed and/or replaced by a dishwasher repair service.

Is your Whirlpool dishwasher making noise even after these troubleshooting tips? Schedule an appointment with C&J Appliance Service for a fast and professional repair!