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Why Is My Thermador Dishwasher Making Noise?

In this Article


Ah, the sweet, sweet sound of a dishwasher running – unless it’s your Thermador dishwasher making noise that sounds more like a rock concert than a gentle hum. Don’t fret! In this guide, we’ll unravel the mystery behind those alarming sounds and offer some easy fixes.

Common Causes of a Thermador Dishwasher Making Noise

Noise from a dishwasher can be both jarring and concerning. Let’s explore some of the frequent culprits behind these unusual sounds.

Dishes Are Overcrowded

One of the most common reasons why your dishwasher might be making an alarming clatter is simply that your dishes are jostling about and clanging together.

Why it happens: If dishes are loaded too closely, they can hit each other during the wash cycle, especially when water jets push them around.

The fix: Make sure you’re giving each dish and utensil some space. Instead of stacking plates tightly together, place them an inch or so apart. Ensure glasses and mugs are secure and not touching each other.

Keep it quiet: For a peaceful wash, always double-check your load before starting the cycle. Make sure nothing is leaning or has the potential to shift and cause a racket.

why does my dishwasher make a weird sound

Spray Arm Is Blocked or Clogged

If you’ve ever wondered, “Why does my dishwasher make a weird sound when it’s supposed to be cleaning?”, a blocked spray arm might be the culprit.

The details: The spray arm rotates and sprays water, helping clean your dishes. But if it’s obstructed by a dish or utensil, or its jets are clogged with debris, it can create unusual sounds.

What to do: First, ensure that tall dishes or utensils aren’t blocking the spray arm’s movement. If the arm itself seems clogged, remove it according to the manufacturer’s instructions and rinse under running water. Use a small brush or toothpick to clear out any stubborn debris from the jets.

Preventive measures: Regularly check and clean the spray arm to avoid build-up and ensure it moves freely without obstruction.

Noisy Water Supply

A Thermador dishwasher noise can also be traced back to issues with the water supply. Some water supply issues can even keep your dishwasher from starting a cycle properly.

The lowdown: If the inlet hose is kinked or if there’s a problem with the water inlet valve, your dishwasher might make an unpleasant noise.

Troubleshooting: Check the inlet hose at the back of your dishwasher. If it’s kinked or twisted, straighten it out. If you suspect a defective water inlet valve, it’s best to call a Thermador repair professional as replacing this component requires expertise.

Keeping things hushed: Regularly inspect the hose to ensure it remains unkinked. If you notice recurrent issues with the water supply, consult a professional to avoid potential damage.

Drain Hose or Pump Obstruction

If you’re hearing your Thermador dishwasher making noise during the cycle, especially towards the end, the issue could be in the drainage system.

Cause: Small bits of food, glass, or other debris might obstruct the drain hose or the pump, causing a grinding or humming sound.

Solution: Disconnect power and water supply, then inspect the drain hose and pump. Carefully remove any obstructions you find. If the sound persists, the pump might be faulty and may need a replacement.

Staying obstruction-free: Regularly cleaning your dishwasher filter can prevent large debris from reaching the drain hose or pump. Make it a habit to clear plates of large food particles before placing them in the dishwasher.

dishwasher making a loud sound during the cycle

For those tricky issues where a DIY fix just doesn’t cut it, consider reaching out to Don Bacon Appliance Service. Our expertise in high-end dishwasher repair Cincinnati will ensure that your Thermador keeps running smoothly without any noisy hiccups.

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