Mixer Grinder
Noise Troubleshooting
Every unusual sound your mixer makes is a clue. Rattling, humming, grinding, squealing — each noise points to a specific part failure. This guide maps every sound to its cause and tells you exactly what to do next.
What Does Your Mixer Sound Like?
Select the sound your machine is making. Each sound maps to specific part failures with exact diagnosis steps and repair costs.
Rattling
A loose, clattering sound — like coins in a tin box
Symptoms
Rattling starts immediately when you switch on. Gets louder at higher speeds. Jar feels wobbly when you press it down.
How to Diagnose
Lift the jar off and reattach it. Press down firmly until you feel it click into the coupler. If the rattle persists, the coupler teeth are worn.
What to Do
Reattach jar firmly. If coupler teeth are visibly chipped or rounded, replace the coupler (Rs.60–120).
Complete Noise-to-Part Diagnostic Table
Bookmark this table. Every sound, every cause, every action — in one place.
| Sound | When It Happens | Likely Part | Urgency | Action |
|---|---|---|---|---|
| Rattling (loose) | On startup | Coupler / Jar attachment | Medium | Reattach jar; replace coupler if worn |
| Rattling (sudden) | Mid-grind | Foreign object in jar | High | Stop immediately; inspect jar |
| Humming, no spin | On startup | OLP tripped / seized bearing | High | Cool + reset OLP; replace blade if seized |
| Humming, weak spin | During use | Worn carbon brushes | Medium | Service centre — brush replacement |
| Metal scraping | During grinding | Bent blade / worn motor bush | High | Stop; replace blade or service motor |
| High-pitched squeal | On startup | Dry blade bearing | Low | Food-grade oil; replace blade if persists |
| Electronic whine | During use | BLDC capacitor / controller | High | Service centre; check warranty |
| Thudding / walking | During use | Worn vacuum feet | Low | Replace rubber feet (Rs.50–100) |
| Clicking on start | On startup | Speed selector contacts | Medium | Clean contacts; service if persists |
| Burning smell + noise | During use | Motor windings / overload | Critical | Stop immediately; service centre |
When in doubt, stop the machine
Any new noise that wasn't there before is a signal. Running a machine with an undiagnosed noise can turn a Rs.150 coupler replacement into a Rs.2,000 motor rewind. When in doubt, stop, diagnose, then fix.
Normal Sounds vs. Warning Signs
Not every noise means something is wrong. Here's how to tell the difference between a healthy machine and one that needs attention.
Normal — Don't Worry
Low motor hum at startup
Normal motor inrush current — lasts 1–2 seconds
Slight vibration on granite counter
High-speed rotation creates natural vibration — use a rubber mat
Louder noise at Speed 3 vs Speed 1
Higher RPM = more air turbulence through vents — completely normal
Brief rattle when switching speeds
Speed selector contacts engaging — normal in older machines
Slight noise change when jar fills up
Load on motor increases as ingredients are added — normal
Abnormal — Investigate
Any new noise that wasn't there last week
Something has changed — diagnose before continuing
Noise that gets worse over time
Progressive wear — will become a bigger problem if ignored
Noise accompanied by burning smell
Stop immediately — motor or wiring issue
Noise with sparks through vents
Carbon brush failure — service centre required
Noise with reduced grinding power
Motor or bearing issue — don't ignore
Related Guides
DIY Repair Hub
Step-by-step fixes for the most common mixer grinder problems — OLP reset, coupler swap, blade replacement.
Go to Repair Hub →Parts Name Guide
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See All Parts →Maintenance Schedule
Prevent noise problems before they start. Monthly, quarterly, and yearly maintenance checklist for Indian kitchens.
View Schedule →Top 10 Mixers in India
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