A KitchenAid stand mixer is a kitchen essential, but when it starts making unexpected noises, it can be both distracting and concerning. While some level of sound is normal, excessive noise might signal underlying issues that need attention.
If your mixer has become unusually loud, don’t worry, we’ll guide you through the troubleshooting process so you can identify the cause and fix it.
Identifying Mixer Noises and Their Causes
Understanding the type of noise your mixer makes helps with diagnosing the problem. Pay attention to when the noise occurs, does it happen only with certain ingredients, at high speeds, or randomly? Noting these details will help pinpoint the issue.
Here are some common mixer noises and what they typically mean:
1. Rattling or Clanking
Possible cause: Loose screws, bolts, or attachments
A rattling or clanking noise often means that parts of your mixer have come loose. Over time, vibrations from mixing can shake screws or bolts loose. Check for any visibly loose components and tighten them.
2. Grinding or Gritty Sounds
Possible cause: Lack of lubrication or worn-out gears
If your mixer is making a grinding noise, it may be due to friction between moving parts. This could mean the mixer needs lubrication or that internal gears are wearing out. Applying food-grade grease to the gears can often fix this issue.
3. Squeaking or Screeching
Possible cause: Metal-on-metal contact
A high-pitched squeaking sound suggests that metal parts are rubbing together. This could be caused by worn-down attachments or improper alignment. Check and replace any attachments showing signs of damage.
4. Popping or Clicking
Possible cause: Thermal expansion of metal components
A popping or clicking noise is sometimes caused by the natural expansion and contraction of metal parts as they heat up during extended use. If the noise is infrequent and doesn’t affect performance, it may not require immediate action.
Common Reasons Your KitchenAid Mixer Is Noisy
Several factors can lead to increased noise levels in your KitchenAid stand mixer. Here’s a breakdown of the most common causes:
1. Overloading the Mixer
Mixing too many ingredients at once or using a high speed for dense dough can strain the motor, making it noisier. Follow the manufacturer’s capacity guidelines to avoid overworking the mixer.
2. Loose Parts
Screws, bolts, or attachment hubs can loosen over time due to vibration. Regularly inspect your mixer and tighten any parts that appear loose to reduce noise.
3. Worn or Damaged Attachments
If your beater, dough hook, or wire whip is worn out, it may cause uneven mixing and excessive noise. Look for cracks, bent prongs, or other signs of wear, and replace attachments as needed.
4. Attachment Interference
Improperly installed attachments can hit the mixing bowl or other parts, causing a loud clanking or grinding noise. Make sure attachments are properly installed and adjusted according to your user manual.
5. Insufficient Lubrication
KitchenAid mixers rely on internal grease to keep moving parts running smoothly. Over time, this grease can break down, leading to increased friction and noise. Check your user manual for lubrication guidelines and apply fresh grease if necessary.
6. Misaligned or Worn Gears
If your mixer’s gears are worn or misaligned, you may notice excessive noise and vibration. This usually requires professional servicing to replace the affected components.
7. Worn-Out Motor Brushes
Motor brushes transmit electricity to the motor and wear down over time. If they become too worn, the motor may become louder. Replacing them can help restore quieter operation.
Safety Tips for Troubleshooting Your Mixer
Before performing any maintenance or repairs, follow these safety precautions:
- Unplug the mixer: Always disconnect the power before opening or working on your appliance.
- Let it cool down: If the mixer was recently used, allow it to cool before handling.
- Keep your workspace clear: Work in a well-lit, clutter-free area, away from children and pets.
- Use dry hands and tools: Never work on electrical components with wet hands.
- Take photos before disassembling: This will make reassembly easier if you need to remove any parts.
- Handle parts gently: Applying too much force can cause damage or injury.
- Wear protective gloves: This can prevent cuts from sharp metal components.
- Consult the user manual: Always check manufacturer instructions before making adjustments.
How to Fix a Noisy KitchenAid Stand Mixer
Follow these steps to diagnose and fix the cause of the noise in your KitchenAid stand mixer.
Step 1. Check the Attachments
- Unplug the mixer from the power outlet.
- Remove the attachment by releasing it from the attachment hub.
- Inspect the attachment for signs of wear or damage.
- Check all other attachments for wear or damage.
- Attach the attachment securely to the hub.
- Replace any worn-out or damaged attachments.
- Plug in the mixer and turn it on to test for noise.
- If the noise persists, continue to the next step.
Step 2. Check for Loose Parts
- Unplug the mixer from the power outlet.
- Inspect the exterior of the mixer for any loose screws or bolts.
- Open the top cover if necessary.
- Look for any loose internal parts.
- Use a screwdriver or pliers to tighten any loose screws, bolts, or the attachment hub.
- Reassemble the mixer if disassembled.
- Plug in the mixer and turn it on to test for noise.
- If the noise persists, proceed to the next step.
Step 3. Add Food-Grade Grease
- Unplug the mixer from the power outlet.
- Check the user manual for parts that require lubrication.
- Identify the recommended type of food-grade grease.
- Open the gear housing.
- Inspect the existing grease for dryness, old residue, or insufficient coverage.
- Wipe off old grease if necessary.
- Apply fresh food-grade grease to the designated parts.
- Avoid over-applying grease to prevent leaks.
- Reassemble the mixer.
- Plug in the mixer and turn it on to test for noise.
- If the noise persists, move on to the next step.
Step 4. Check the Gears
- Unplug the mixer from the power outlet.
- Open the gear housing following the user manual instructions.
- Inspect the gears for pitting, chipping, or uneven wear.
- Check for misalignment or excessive movement in the gears.
- Look for old or insufficient grease coverage.
- Wipe off old grease if necessary and apply fresh grease.
- Replace any damaged gears.
- Reassemble the mixer.
- Plug in the mixer and turn it on to test for noise.
- If the noise persists, continue to the next step.
Step 5. Check the Motor Brushes
- Unplug the mixer from the power outlet.
- Locate the motor brushes, usually behind brush caps on the sides of the mixer head.
- Remove the back cover or brush caps using a screwdriver.
- Inspect the motor brushes for wear.
- Replace brushes if worn down to less than ¼ inch.
- Insert new, manufacturer-approved motor brushes.
- Secure the brush caps or reattach the back cover.
- Plug in the mixer and turn it on to test for noise.
Also Read: 5 Simple Steps to Clean a Stand Mixer for a Streak-Free Shine
Summing Up
A KitchenAid stand mixer shouldn’t be louder than your kitchen itself. If it starts making unexpected noises, something might be off. Small issues can turn into costly repairs if ignored, so it’s best to check things early.
Many of these fixes are simple and don’t take much time. Loose screws, dried-up grease, or worn-out parts could be the problem. Taking a few minutes to inspect and adjust things can bring the noise down.
But if it still sounds rough after troubleshooting, getting professional help might be the best option. A well-cared-for mixer should run smoothly, so give it the attention it needs and enjoy baking without the extra noise.