News
0102030405
What Elevator Parts Fail Most Often and Require Immediate Replacement?
2026-03-23
Critical Elevator Parts Requiring Immediate Replacement.
🚪
1. Door System Parts (Highest Failure Rate)
The door system is the most frequently used elevator part and has the highest failure rate, accounting for over 70% of total elevator malfunctions.
| Component | Symptoms | Replacement Cycle | Urgency Level |
|---|---|---|---|
| Door operator belt/rope | Slipping, breakage, door won't open/close | 2-3 years | 🟡 High - Breakage causes door--loss of control |
| Door hanger rollers slider blocks | Door shaking, jamming, unusual noise | 2-3 years | 🟡 High - Wear causes door derailment |
| Door lock | Door won't close, elevator won't start | 3-4 years | 🔴 Critical - Failure risks falling accidents |
| Door vane | Door won't open properly, impact noise | 5 years | 🟢 Medium - Affects door synchronization |
| Light curtain safety edge | Pinching passengers, false activation, failure | Replace immediately when faulty | 🔴 Critical - Directly affects passenger safety |
🚨 Immediate Replacement Required When:
• Door lock contacts show poor contact or cannot close → Must replace immediately, otherwise elevator may operate with doors open
• Light curtain failure causing passenger pinching → Immediate shutdown and replacement
• Light curtain failure causing passenger pinching → Immediate shutdown and replacement
🏗️
2. Traction System Parts (Load-Bearing Core)
| Component | Symptoms | Replacement Cycle | Urgency Level |
|---|---|---|---|
| Traction steel wire ropes | Broken wires, corrosion, elongation | 4-10 years | 🔴 Critical - Breakage causes car falling |
| Traction sheave Reverse Rope Sheave | Groove wear, rope slipping | 5-8 years | 🟡 High - Affects traction capability |
| Traction machine bearings | Unusual noise, vibration, overheating | 3-5 years | 🟡 High - Damage causes system seizure |
| Deflector sheave bearings | Noise, poor rotation | 3 years | 🟢 Medium |
🚨 Immediate Replacement Required When:
• Ropes show broken wires, broken strands, or diameter reduction exceeding 10% of the original size → Replace immediately
• Severe rope corrosion → Replace immediately to prevent sudden breakage
• Severe rope corrosion → Replace immediately to prevent sudden breakage
🛑
3. Braking System Parts (Critical for Safe Stopping)
| Component | Symptoms | Replacement Cycle | Urgency Level |
|---|---|---|---|
| Brake linings/brake shoes | Increased braking distance, brake noise | 1-3 years | 🔴 Critical - Failure causes over-travel or bottoming |
| Brake springs | Insufficient braking force, slow braking | 5 years | 🟡 High |
| Brake electromagnets | Brake won't open or close | 5 years | 🔴 Critical |
🚨 Immediate Replacement Required When:
• Brake linings worn to manufacturer's minimum thickness → Replace immediately
• Brake contaminated with oil, causing slipping → Immediate cleaning or replacement
• Noticeably increased braking distance → Immediate inspection and replacement
• Brake contaminated with oil, causing slipping → Immediate cleaning or replacement
• Noticeably increased braking distance → Immediate inspection and replacement
🛡️
4. Safety Protection System Parts (Life-Saving Lines)
| Component | Symptoms | Replacement Cycle | Urgency Level |
|---|---|---|---|
| Overspeed governor | Failure to activate during overspeed, false activation | 5-8 years | 🔴 Critical - Failure causes falling accidents |
| Safety gear | Failure to stop the car after the governor activation | 7-10 years | 🔴 Critical |
| Buffer | Hydraulic oil leakage, failure to reset | 3-5 years | 🟡 High - Final safety defense line |
| Governor steel balls | Wear, jamming, insensitive triggering | 2-4 years | 🟡 High |
🚨 Immediate Replacement Required When:
• Governor inaccurate activation or jamming → Immediate repair or replacement
🧠
5. Control System Parts (Elevator Brain)
| Component | Symptoms | Replacement Cycle | Urgency Level |
|---|---|---|---|
| Contactors/relays | Contact burning, abnormal attraction | 3-5 years | 🟡 High - Causes elevator |
| Inverter/VFD | Abnormal motor speed, overheating | 2-5 years | 🟡 High |
| Control boards/circuit boards | Program errors, system freeze | 3-6 years | 🟢 Medium |
| Safety circuit relays | Safety circuit disconnection, elevator shutdown | 3-5 years | 🔴 Critical |
🚨 Immediate Replacement Required When:
• Severely burned contactor contacts → Immediate replacement to prevent fire or elevator failure
• Poor contact in safety circuit relays → Immediate replacement
• Poor contact in safety circuit relays → Immediate replacement
🔧
6. Other Wear-Prone Parts
| Component | Symptoms | Replacement Cycle | Urgency Level |
|---|---|---|---|
| Guide shoe liners | Running instability, noise, vibration | 1-5 years | 🟢 Medium |
| Buffer hydraulic oil | Reduced buffering effect | 5 years | 🟢 Medium |
| Light bulbs/emergency batteries | Lighting failure, loss of emergency function | 6 months-3 years | 🟢 Low |
| Buttons/display panels | Poor contact, abnormal display | Replace when faulty | 🟢 Low |
We offer brand new, original elevator parts. Please feel free to contact us if you have any needs.
Contact person: Candice
Email: candice@nonaelevator.com
Contact Phone: (86) 17719527681（Whatsapp/Wechat）