Shark robot vacuum not charging

Shark robot vacuum not Charging – Common Causes and Solutions


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Welcome to our comprehensive guide on troubleshooting the Shark Robot Vacuum not charging issue. If you’ve encountered a situation where your trusty cleaning companion is not charging, fear not, as there are numerous common causes for this problem, and many of them can be easily resolved. 

Before you jump to conclusions about needing a battery replacement, let’s explore the potential causes and their respective solutions. With a little understanding and troubleshooting, you’ll have your Shark robot vacuum up and running efficiently once again. So, without further ado, let’s delve into the troubleshooting process and get your vacuum back in tip-top shape.

Shark robot vacuum not charging: common causes

Shark robot vacuum

Battery Replacement Needed 

Like all rechargeable batteries, the one inside a robot vacuum has a limited lifespan and capacity. Over time, with extensive use and repeated charge cycles, the battery’s performance can gradually decline, leading to charging issues and reduced cleaning efficiency.

Signs that your Shark robot vacuum might need a battery replacement include:

  • Reduced Cleaning Time: The robot’s run time per charge becomes noticeably shorter than when it was new, and it requires more frequent recharging during cleaning cycles.
  • Difficulty Charging: The vacuum might have trouble holding a charge or refuses to charge altogether, despite attempting various troubleshooting steps.
  • Erratic Behavior: The robot may exhibit erratic charging behavior, such as displaying inconsistent battery level readings or shutting down unexpectedly during cleaning tasks.

If your Shark robot vacuum is several years old and has been heavily used, and you observe any of the above signs, it is likely that the battery has reached the end of its usable life and requires replacement.

Power Source Connection 

Another common issue that your Shark robot vacuum is not charging is a bad connection. Ensure that the robot vacuum is correctly connected to the power source. Verify that the charging dock is plugged into a working electrical outlet and that the robot is placed correctly on the dock. A loose connection can prevent the vacuum from receiving power and, consequently, hinder the charging process. 

Sometimes, if the robot is not properly aligned on the charging dock, the charging pins on the robot’s underside may not make sufficient contact with the dock’s connectors, leading to charging issues. Therefore, always double-check the alignment of the robot on the dock to establish a solid connection and allow for efficient charging.

Dirty Charging Contacts 

The charging contacts on both the robot vacuum and the charging dock can get dirty over time, which can cause a bad connection. Gently clean the charging contacts on the robot and the dock with a soft, dry cloth. The accumulation of dirt on the charging contacts disrupts the flow of electricity and can lead to charging problems. 

If the contacts are not making proper and consistent connections, the battery won’t receive the necessary power to charge effectively. As a result, the robot vacuum’s charging performance may be compromised, and it may struggle to maintain a full charge. It’s a good practice to inspect and clean the charging contacts periodically, especially if you notice any decline in the robot’s charging efficiency or if it displays error messages related to charging.

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Shark robot vacuum not charging: other potential issues

Shark robot vacuum not charging

The power button on the side of the robot is turned off 

Shark robots have a power switch on the side. You must have noticed it on your robot vacuum. The thing is that when the switch is off, your vacuum won’t charge.

Obstructed Charging Dock 

The charging dock serves as a home base for the Shark robot vacuum, where it returns to recharge after completing its cleaning tasks. However, it’s not uncommon for objects or debris to inadvertently block the docking area, preventing the robot from aligning properly with the charging dock. When the charging dock is obstructed, the robot vacuum may struggle to find its way back to the dock after cleaning or fail to dock correctly, resulting in charging issues. 

The robot’s navigation sensors may be impeded by objects such as furniture, cords, or other items left on the floor, leading to difficulties in identifying the dock’s location. Additionally, if there is significant debris around the dock, it can interfere with the robot’s ability to make precise movements and align with the charging pins on the dock accurately. 

Check that the charging dock is free from any obstructions. Make sure there are no objects blocking the robot from docking correctly. It’s important to note that even if the charging dock appears clear at first glance, small objects like toys, pet bowls, or low-profile obstacles may still obstruct the robot’s path. 

Faulty Charging Dock or Adapter 

The charging dock and power adapter play a crucial role in providing a stable power supply to the Shark robot vacuum during the charging process. If either of these components is faulty, it can result in charging problems and prevent the robot from receiving the necessary power to charge its battery properly. Over time, wear and tear, electrical surges, or accidental damage can all contribute to their degradation. 

To determine if the charging dock or adapter is at fault, you can try a few troubleshooting steps. First, inspect the charging dock for any visible signs of damage, such as bent pins, loose connectors, or frayed wires. If any physical damage is found, it may indicate the need for a replacement dock.

Additionally, if possible, try testing the robot vacuum with another charging dock. This can be done if you have access to a similar Shark robot vacuum or if a friend or family member owns one. If the robot charges as expected on the alternative charging dock, it points to the original dock being faulty and in need of repair or replacement.

Battery Issues 

When encountering charging problems with your Shark robot vacuum, the battery’s condition is a crucial factor to consider. One common scenario is a completely drained battery. If the robot’s battery is fully depleted, it may not have enough energy to power the charging process immediately. So this can be a potential cause that the Shark robot vacuum is not charging.

In such cases, it is essential to allow the robot vacuum to charge for an extended period, as specified in the user manual. The charging time may vary depending on the model and battery capacity, but it is typically recommended to let the robot charge for several hours or until the battery indicator shows a full charge. When the battery is extremely low, the robot may not respond to power-on commands or show any signs of life until it has accumulated enough charge to boot up. 

This is a safety measure implemented in robot vacuums to prevent potential damage to the battery and the device itself due to sudden power drains. If, after the specified charging time, the robot vacuum still does not respond or function correctly, it’s possible that the battery itself is damaged or has reached the end of its lifespan. 

Rechargeable batteries have a limited number of charge cycles, and over time, their capacity to hold a charge gradually diminishes. If your Shark robot vacuum is relatively old and has undergone heavy use, the battery may need to be replaced.

Software or Firmware Glitch 

Modern robot vacuums, including the Shark models, often rely on sophisticated software and firmware to control their operations and charging processes. Occasionally, a glitch or error in the software or firmware can lead to charging issues. 

These glitches may occur due to various reasons, such as minor software bugs, memory errors, or conflicts between the robot’s hardware and software components. Check for any available updates or patches from the manufacturer. 

These updates may include bug fixes that resolve charging issues and other operational problems. Once the software or firmware update is complete, restart the robot vacuum and test the charging function to see if the glitch has been resolved.


Like any electronic device, robot vacuums generate heat during operation, especially when tackling large cleaning tasks. If your Shark robot vacuum has been running for an extended period, particularly on demanding cleaning cycles or in warm environments, it may activate the overheating protection mechanism. 

When this happens, the robot’s charging function might be temporarily disabled until it cools down to a safe operating temperature. When you encounter charging issues related to overheating, it is essential to allow the robot vacuum ample time to cool down before attempting to charge it.

To prevent overheating issues in the future, consider a few simple measures:

Schedule Regular Cleaning Sessions: Break up large cleaning tasks into shorter, more manageable sessions to reduce the strain on the vacuum and prevent excessive heat buildup.

shark brushes clogged

Clean the Filters and Brushes: Regularly clean or replace the vacuum’s filters and brushes to maintain optimal airflow and prevent clogs that could contribute to overheating.

Vacuum Maintenance: Keep the vacuum’s sensors and moving parts free from dirt and debris. Proper maintenance ensures that the vacuum operates efficiently and potentially generates less heat during cleaning.

Clean and Tidy Environment: A tidy and clutter-free environment helps the robot vacuum navigate more smoothly and efficiently, which can reduce the time it spends running and decrease the likelihood of overheating.

Defective Charging Port 

There are several reasons why a charging port might become defective. Accidental impacts or mishandling of the robot vacuum can cause physical damage to the charging port. For example, if the vacuum is dropped or bumped against hard surfaces, it may result in bent or broken pins within the port, preventing proper electrical contact. 

Also, over time, the repeated insertion and removal of the charging cable can cause wear and tear on the charging port. Eventually, this constant movement can lead to loose connections or internal damage, affecting the charging process. 

If the charging port appears to be intact and clean, but the charging issues persist, it may indicate internal defects that require professional attention. In such cases, it is best to contact the manufacturer’s customer support for assistance. 


As you can see, many causes can occur when the Shark robot vacuum is not charging. From minor, easily fixable, to some more severe issues. By understanding the potential causes and troubleshooting steps outlined here, you will probably find the cause more easily after reading this guide. 

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