Why does my vacuum work on hard floors but not on carpet?

This symptom pattern almost always means the brush roll is not spinning. On hard floors suction alone picks up loose debris. On carpet the brush roll must agitate the fibres to lift embedded dirt — without it the vacuum slides over the surface. Check the brush roll for wrapped hair and inspect the drive belt for cracks or stretch. The suction motor is almost certainly fine.

Why does my vacuum cut out mid-use and then work again after cooling?

This is a thermal cutoff activation — a built-in safety switch that shuts the motor down when it overheats due to restricted airflow. Let the vacuum cool for 30 minutes, clear every possible airflow restriction (empty bin, clean all filters, check for hose blockage), then press the small reset button on the body or base before restarting.

How do I find an air leak in my vacuum?

Turn the vacuum on and run your hand slowly along every joint and seam: the hose-to-body collar, the dustbin lid and gasket, the filter housing, and the full length of the hose. At any leak point you will feel warm air blowing outward against your hand. Even hairline cracks that are barely visible produce clearly detectable airflow this way.

My robot vacuum keeps stopping mid-clean with a flashing red light — what does this mean?

A flashing red light that stops mid-clean on a robot vacuum almost always means one of three things: a full dustbin (robot bins are tiny and must be emptied after every cycle), a stuck or jammed brush roll or side brush, or a cliff sensor fault. Check the dustbin first, then inspect the underside for debris around the brushes and sensors. Clean all sensors with a dry cloth.

Vacuum Help Center — Section 1 of 6

Vacuum Cleaner Troubleshooting

Q: Why has my vacuum suddenly lost suction?

Sudden suction loss is almost always caused by a full dustbin or bag, a clogged pre-motor or HEPA filter, a blockage in the hose or floor head, or a broken drive belt. Start by emptying the bin and cleaning both filters — this resolves the problem in roughly 70% of cases. If suction remains poor, check for a hose blockage using the isolation test: remove the hose from the vacuum body and test suction at the inlet port directly.

Q: What does a burning smell from a vacuum mean?

A burning rubber smell means the drive belt is slipping against a jammed brush roll — turn off and unplug immediately, then inspect the brush roll for wrapped hair. A burning electrical or plastic smell indicates motor overheating, usually from severely blocked airflow. Stop using the vacuum, let it cool, clear all blockages and filters, and press the thermal reset button before restarting.

Something is wrong with your vacuum right now. Find your exact symptom below and get a step-by-step fix. Every guide covers all the causes in order of likelihood — most problems are solved in under 15 minutes.

Find your symptom fast

No / weak suctionMost common problem Burning smellRubber or electrical Won't turn onDead, no response Brush roll not spinningPoor carpet pickup Loud / unusual noiseRattling, squealing Robot won't dockWon't find home base Cuts out mid-useThermal cutoff Leaving dirt behindMissing spots Cordless not chargingBattery / charger Spitting debris outBlowing instead of sucking

Symptom → Cause quick-reference

What you're experiencing	Most likely cause	Guide	Likelihood
Suction suddenly dropped	Full bin or clogged filter	No suction guide	Very likely
Fine on hard floors, useless on carpet	Brush roll not spinning — belt or hair jam	Brush roll guide	Very likely
Good suction at hose, weak at floor head	Blockage in floor head nozzle	No suction §5	Very likely
Burning rubber smell	Belt slipping on jammed brush roll	Burning smell guide	Very likely
Burning electrical / plastic smell	Motor overheating from blocked airflow	Burning smell guide	Very likely
Cuts out, works again after 30 min	Thermal cutoff from restricted airflow	Overheating guide	Very likely
Weak suction even with clean filter & empty bin	Air leak at hose joint or bin seal	No suction §7	Possible
Rattling sound	Debris stuck in motor path or brush roll	Noise guide	Very likely
Squealing sound	Worn belt or dry brush roll bearing	Noise guide	Very likely
Won't turn on at all	Tripped thermal reset, blown fuse, or cord fault	Won't turn on guide	Very likely
Robot won't return to dock	Dirty IR sensors or poor dock placement	Robot docking guide	Very likely
Cordless has short run time	Degraded battery — capacity loss over charge cycles	Battery guide	Possible

💡

The isolation test — use this first Remove the hose from the vacuum body and hold your hand over the inlet port. Strong suction there = the motor and filters are fine; the problem is in the hose, wand, or floor head. Weak there = the issue is the bin, filters, or motor. This one test narrows down 80% of suction problems instantly.

All troubleshooting guides

Vacuum Has No Suction or Weak Suction

9 causes in order of likelihood. Full bin, clogged filters, hose blockage, broken belt, air leak, thermal cutoff, motor wear.

#1 Search

Vacuum Has a Burning Smell

Burning rubber = belt and brush roll. Burning electrical = motor overheating. Stop using immediately. How to diagnose and fix both.

Vacuum Won't Turn On

Check outlet and cord, thermal reset button, internal fuse, and on/off switch before assuming motor failure.

Brush Roll Not Spinning

Hair wrap and broken belts cause this in 95% of cases. Step-by-step inspection and fix for all upright vacuum types.

Vacuum Making Loud or Unusual Noise

Diagnose by noise type: rattling, squealing, grinding, and high-pitched whining each point to different causes.

Vacuum Overheating and Cutting Out

Thermal cutoff activation from blocked airflow. How to cool it, reset it, and prevent it from happening again.

Robot Vacuum Won't Return to Dock

IR sensor dirt, dock clearance requirements, and battery issues are the cause in 90% of cases. Full fix guide.

Robot Vacuum Keeps Stopping Mid-Clean

Full bin, jammed brush roll, cliff sensor fault, and navigation errors. How to read the error light pattern.

Vacuum Leaving Dirt Behind

Brush roll, floor head height adjustment, suction loss, and worn bristles — which one is causing your vacuum to miss debris.

Cordless Vacuum Not Charging

Dirty charge contacts, faulty charger, failed battery — how to isolate the cause and fix or replace the right component.

Vacuum Spitting or Blowing Debris Back Out

Full bin, blocked exhaust port, or a torn filter — the causes of a vacuum that expels debris instead of collecting it.

Vacuum Smells Bad When Running

Pet dander, mold, and bacteria buildup in the bin, brush roll, hose, and filter. Step-by-step odor removal guide.

Quick answers — most searched questions

Why does my vacuum work on hard floors but not carpet?

The brush roll is not spinning. On carpet it must agitate fibres to lift dirt — without it the vacuum slides over the surface. The motor suction is likely fine. Check for hair wrap and inspect the belt.

Full brush roll guide →

My vacuum cuts out and works again after 30 minutes — what is that?

That is a thermal cutoff — a safety switch that shuts the motor down when it overheats from restricted airflow. Clear all blockages and filters, let it cool, then press the reset button on the base.

Overheating guide →

How do I know if my vacuum has an air leak?

Turn it on and run your hand along every seam and joint. Anywhere you feel warm air blowing outward is a leak. Check the hose length, bin gasket, filter housing, and all wand locking collars.

Air leak fix →

Should I repair my vacuum or replace it?

Belts ($5–15), filters ($10–30), and hoses ($20–50) are almost always worth repairing. Motor replacement ($60–150+) only makes sense if repair cost is under 50% of the vacuum's replacement value.

Full repair vs replace guide →

What does burning rubber smell mean from a vacuum?

Unplug immediately. The drive belt is slipping against a jammed brush roll — the friction is melting the belt. Remove the base plate, cut away any hair wrapped around the brush roll, then inspect and replace the belt.

Burning smell guide →

Why is my robot vacuum leaving lines on the floor or missing spots?

First check: is the bin full? Robot bins are tiny and must be emptied after every cycle. Next: are the side brushes worn or hair-wrapped? Dirty cliff sensors also cause robots to avoid clean areas.

Leaving dirt guide →

Troubleshooting by vacuum type

🏠 Upright Vacuums

Belt, brush roll, and the elbow joint blockage are the three most common upright failure points. Two filters need regular attention.

🤖 Robot Vacuums

Tiny bin, small filters, side brush hair wrap, and sensor calibration issues. Most robot problems are maintenance, not hardware failure.

🪣 Canister Vacuums

Long hose = more potential leak and blockage points. Telescoping wand collars wear and leak air. Check all connections first.

⚡ Cordless Stick

Tiny bin fills in minutes. Battery degrades over 2–3 years. Short runtime and reduced suction often mean battery, not motor.

💧 Wet/Dry Shop Vac

Wrong filter for the job is the #1 cause of suction loss. Wet pickup requires foam sleeve; fine dust requires paper bag + fine filter.

🏗️ Central Vacuum

Check canister fill level first (often in a basement, forgotten for months). Inlet valve seals at wall ports are common air leak sites.

Frequently asked troubleshooting questions

Why has my vacuum suddenly lost suction?

Almost always one of four causes: (1) Full dustbin or bag — a bin over two-thirds full cuts suction by 40–60%. (2) Clogged filter — both pre-motor and HEPA filters need regular cleaning. (3) Hose or floor head blockage — use the isolation test to locate it. (4) Broken or stretched drive belt — especially if performance is worse on carpet than hard floors. Work through them in that order. Full 9-cause guide →

What does a burning smell from a vacuum mean — and is it safe to keep using?

No — stop using it immediately and unplug it. Burning rubber smell = the drive belt is slipping against a jammed brush roll, generating heat and melting the belt. Unplug, remove the base plate, cut away any hair wrapped around the brush roll, and replace the belt. Burning electrical or plastic smell = motor overheating, usually from severely blocked airflow. Let it cool 30 minutes, clear all blockages and filters, press the thermal reset button, then restart. If the electrical smell returns even after clearing blockages, have the motor inspected by a technician before using the vacuum again. Full guide →

My vacuum is making a loud rattling noise it wasn't making before — what is it?

A new rattling noise almost always means something hard has entered the airpath — a coin, a small stone, a piece of broken plastic — and is bouncing around in the hose or impacting the fan blades. Turn off immediately. Check the hose and floor head for foreign debris. If the noise is coming from inside the motor housing and the hose is clear, the fan blade may be chipped or broken — this requires opening the motor housing to inspect. Running a vacuum with a damaged fan blade can worsen rapidly and cause motor failure. Full noise diagnosis guide →

Why won't my robot vacuum dock even though it's near the base?

Robot vacuums use infrared sensors to locate the dock. The most common causes of failed docking are: dirty sensors on both the robot and the dock (clean with a dry cloth); insufficient dock clearance — the dock needs 18 inches of clear space on each side and 4 feet in front; direct sunlight hitting the dock's IR emitter, washing out the signal; or critically low battery where the robot loses navigation ability before it can complete the return. Full docking guide →

How do I find out what's wrong with my vacuum if I can't identify the problem from symptoms?

Use the isolation test: disconnect the hose from the vacuum body and hold your hand over the vacuum's inlet port. Strong suction at the port = the motor and filters are working; the problem is in the hose, wand, or floor head. Weak suction at the port = the issue is the bin, filters, or motor. This single test narrows the diagnosis to one of two halves of the vacuum. From there, work through each component in that section systematically — usually starting with the simplest and cheapest possibilities first.

My vacuum runs but doesn't pick anything up — what's going on?

If the motor is running but nothing is being picked up, check in this order: (1) Is the floor head attached and properly clicked in? (2) Is there a complete hose or floor head blockage? (3) Is the bin or bag overfull and the inlet completely blocked? (4) On carpet specifically — is the brush roll spinning? A vacuum without a spinning brush roll on carpet picks up almost nothing even with full motor suction. (5) Is the floor head height adjustment set correctly for your floor surface?

⚠️

Safety reminder Always unplug your vacuum before opening any cover, removing the brush roll, or inspecting internal components. Never run a vacuum with a burning smell — stop, unplug, and diagnose before resuming use.