When Frequent Lift Downtime Means It’s Time to Plan Maintenance Changes or Upgrades
Failing Doors on Elevators
If your lift doors work sometimes but not others, it can be one of the most frustrating problems to deal with. One moment the lift is operating normally, and the next it refuses to open or close properly — often without any obvious reason.
Intermittent lift door issues are extremely common, particularly after periods of heavy use or colder, damp weather. While the lift may still appear usable, these on-and-off problems are often an early warning sign of a deeper issue.
In this article, we explain why lift doors fail intermittently, what usually causes the problem, and how it can be fixed before it leads to repeated downtime.
Why Intermittent Door Faults Are So Common
Lift doors are one of the most frequently used parts of any lift system. Every journey relies on them opening and closing smoothly, safely, and in the correct sequence. Because of this constant use, even small issues can start to show up as irregular faults.
Unlike a complete failure, intermittent door problems don’t happen every time. This makes them harder to diagnose and easy to dismiss — until the lift starts shutting down more often.
Common Causes of Doors Failing Intermittently
One of the most frequent causes is sensor interference. Door sensors are designed to detect people or objects and prevent the doors from closing on them. Dust, dirt, moisture, or even changes in light conditions can interfere with these sensors, causing the doors to hesitate or reverse unexpectedly.
Wear and tear also plays a major role. Rollers, tracks, and guides can become worn or misaligned over time. When this happens, doors may stick slightly, move unevenly, or fail to close smoothly every time. Even minor resistance can trigger the lift’s safety systems.
Electrical signals can also be a factor. Loose connections or ageing components may cause inconsistent communication between the door system and the lift controller. This can result in doors behaving unpredictably, even though the lift appears fine most of the time.
Why These Issues Shouldn’t Be Ignored
Intermittent door faults rarely fix themselves. In fact, they often get worse over time. What starts as an occasional delay can develop into frequent shutdowns, with the lift being taken out of service as a safety precaution.
These problems can also cause inconvenience and concern for lift users. Doors that don’t respond properly can lead to complaints, accessibility issues, and increased callouts — all of which add cost and disruption.
Addressing the issue early is usually far simpler and more cost-effective than waiting for a complete failure.
How Intermittent Door Problems Are Diagnosed
Because these faults don’t happen consistently, diagnosing them requires experience and careful inspection. Engineers will often look for signs of wear, contamination, or misalignment, as well as checking sensors and electrical connections.
Testing the lift under normal operating conditions is key. By understanding how the doors behave over multiple journeys, it becomes easier to identify what’s causing the irregular behaviour.
Preventing Repeat Door Problems
Once the underlying cause has been identified, targeted repairs or adjustments can significantly improve reliability. This might involve cleaning or realigning components, replacing worn parts, or adjusting settings to ensure the doors respond correctly every time.
Regular maintenance also plays an important role. Lifts that are serviced with a focus on door performance tend to experience fewer shutdowns and less unexpected downtime.
When to Seek Professional Support
If lift doors are failing intermittently, it’s a good idea to get professional support before the problem escalates. Experienced engineers can identify early signs of failure and prevent repeat issues that lead to lifts being taken out of service.
ACE Elevators (Northern) supports buildings across the North of England by diagnosing and resolving intermittent lift door problems. By focusing on the root cause rather than quick resets, they help improve reliability, reduce downtime, and keep lifts operating smoothly for everyday use.
If your lift doors are behaving unpredictably, addressing the issue early can save time, reduce disruption, and prevent more serious faults later on.

















