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| Symptom | Possible Cause | Kirby | Hoover |
| Vacuum Cleaner will not turn on. No lights are on and motor remain off. Acts like Vacuum is not plugged in. | Broken wire in cord. | Replacement Cords | Replacement Cords |
| Defective on/off switch. | Replacement on/off switches | Replacement on/off switches | |
| Vacuum has no power. | |||
| Broken power wire inside vacuum. | |||
| Vacuum Cleaner light turns on but motor does not. Also if vacuum does not have a light and vacuum acts like it has no power these items will also apply. | Broken power wire inside vacuum. | ||
| Defective Motor Armature. | Replacement Armatures | Replacement motors | |
| Defective Field Windings. | Replacement Field Windings | Replacement motors | |
| Defective Motor Bearings. | Replacement Motor Bearings | ||
| Defective Carbon Motor Brushes. | Replacement Motor Brushes | Replacement Motor Brushes | |
| Jammed Fan. | |||
| Defective speed switch. | Replacement Speed Switch | ||
| Vacuum turned on but stopped after awhile. | Motor overheated due to blocked ventilation or dirty filter. | Replacement filters | |
| Tripped circuit breaker. | |||
| Motor runs too slow | Motor binding due to dirt. | ||
| Defective Carbon Motor Brushes. | Replacement Motor Brushes | Replacement Motor Brushes | |
| Burned up Armature. | Replacement Armatures | Replacement motors | |
| Burned up Field Windings. | Replacement Field Windings | Replacement motors | |
| Defective Motor Bearings. | Replacement bearings | Replacement Bearings | |
| Motor runs too fast | Fan is loose. | ||
| Belt is broken. | Replacement Belt | Replacement Belt | |
| Defective field windings. | Replacement Field Windings | Replacement motors | |
| Motor overheats or smokes or buzzes | Blocked Ventilation openings | Replacement filters | |
| Fan jammed or dirty. | |||
| Worn Carbon Motor Brushes | Replacement Motor Brushes | Replacement Motor Brushes | |
| Defective Motor Armature. | Replacement Armatures | Replacement motors | |
| Defective Motor Field Windings. | Replacement Field Windings | Replacement motors | |
| Frozen Motor Bearings. | |||
| Brush will not rotate. Motor is on | Broken or loose belt | Replacement Belts | Replacement belts |
| Belt is off drive shaft (Kirby Models). | |||
| Beater Brush bearings are frozen. | Replacement Brushes | Replacement brushes | |
| Power wire broken to power nozzle (Tanks and canisters). | Replacement Power Hose | ||
| Vacuum cleaner runs intermittently | Faulty Power Cord. | Replacement power cord | Replacement power cord |
| Faulty on/off switch. | Replacement on/off switch | Replacement on/off switch | |
| Power wire loose or not making good connection - internal | |||
| Faulty Motor. | Replacement Motor | Replacement Motor | |
| Motor runs in one speed. Two speed models only | Defective speed switch. | Replacement speed switch | |
| Defective Motor field windings. | Replacement Field Windings | Replacement Motor | |
| Weak Suction but motor runs | Plugged hose or vacuum head. | ||
| Canisters and tanks will lose suction when bag is full. | Replacement bags | ||
| Loose fan on motor shaft. | |||
| Filter and/or exhaust screen dirty or blocked on some models. | Replacement filters | ||
| Puncture in hose causing suction leak. Canister or tank. | Replacement Hoses | Replacement Hoses | |
| Air leakage at swivel cap, or attachments. | |||
| Defective motor assembly. | Replacement Motor | Replacement motor | |
| Motor stuck in slow speed - Two speed models. | |||
| Defective/blocked fan. | Replacement Fan | Replacement fans | |
| Vacuum cleaner is noisy | Loose, bent or broken fan. | Replacement fan | Replacement fans |
| Defective bearings. | Replacement bearings | Replacement bearings | |
| Check for foreign objects sucked into sweeper and caught in fan. | |||
| Check for alignment problem with fan or armature. | |||
| Vacuum Cleaner does not clean very well - Uprights only | Brush height not adjusted properly. | ||
| Brush worn or clogged with debris. | |||
| Worn or broken belt. | Replacement Belts | Replacement Belts | |
| Belt is off drive shaft - Kirby Models. | |||
| Wheel height needs adjustment. | |||
| Head blocked with foreign object. | |||
| Cord reel will not rewind | Cord is jamming reel. | ||
| Broken cord reel spring. | Replacement Cord reels | ||
| Loose parts in cord reel assembly. | |||
| Dirt leaks from vacuum Cleaner. | Dust bag has a hole. | Replacement Bags | Replacement bags |
| Bag not correctly installed. | |||
| Gasket to seal bag not properly installed or defective. | Replacement gaskets | Replacement gaskets |
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