The Dyson DC40 is a renowned vacuum cleaner, celebrated for its powerful suction and innovative design, making it a favorite among households seeking a reliable cleaning solution. However, like any sophisticated piece of technology, it is not immune to issues. One of the most common problems faced by users is a loss of suction in the hose. This issue can significantly impact the vacuum’s cleaning efficiency, making it difficult to pick up dirt and debris from carpets and floors.

The hose is an essential component of the vacuum, designed to tackle hard-to-reach areas and ensure a thorough clean. When suction power diminishes, the vacuum’s ability to remove dust, pet hair, and other allergens from your home is compromised, affecting not only the cleanliness of your living spaces but also the overall indoor air quality. Addressing this problem promptly is crucial to maintaining the Dyson DC40’s performance and extending its lifespan, ensuring it continues to meet the cleaning needs of its users effectively.

There are several reason behind this issue. The most common issue is with the hose. It could be both internal and external hose. The next it could be blockage in the cyclone assembly, and then filters.
Let’s find out in details:

Common Causes of No Suction in Dyson DC40 Hose

Blockages

Blockages are a primary culprit when it comes to loss of suction in the Dyson DC40 hose. These obstructions can occur anywhere within the hose or the vacuum’s pathways, including the wand, bin inlet, and the brush bar. Debris such as large particles, hair, and fibers can accumulate over time, hindering airflow and reducing suction power. To check for blockages, first, detach the hose from the vacuum and visually inspect it. You can use a long, flexible tool (like a straightened coat hanger) to gently remove any obstructions. Remember to also check the entry and exit points of the hose, as well as the vacuum’s head and attachments, for any hidden blockages.

Filter Issues

Filters play a crucial role in maintaining the vacuum’s suction by trapping dust and preventing it from clogging the motor. The Dyson DC40 features a washable lifetime filter that, if not cleaned regularly, can lead to a decrease in suction power. Over time, filters can become clogged with fine dust particles, which impedes airflow. To maintain optimal performance, wash the filter with cold water at least every month and let it dry completely for 24 hours before reinstalling it. If the filter appears damaged or excessively worn, it may need to be replaced to restore the vacuum’s efficiency.

Air Leaks

Air leaks in the hose or the vacuum body can significantly reduce the Dyson DC40’s suction power. These leaks can occur due to cracks, holes, or loose connections in the hose or the vacuum assembly. To diagnose air leaks, first, inspect the hose for any visible signs of damage. Listen for any hissing sounds that indicate escaping air while the vacuum is running. Check the connections between the hose, wand, and vacuum body to ensure they are secure. If you find any damaged parts, replacing them is necessary to regain full suction power.

Wear and Tear

Normal wear and tear can also affect the vacuum’s suction ability over time. Components such as the hose, seals, and brush bar can become worn or damaged, leading to decreased performance. Regularly inspect these parts for signs of wear or damage. The brush bar, for instance, can accumulate hair and debris that reduce its effectiveness and, by extension, the vacuum’s ability to suction. Replacing worn-out parts is essential for maintaining the vacuum’s functionality and suction power.

By understanding and addressing these common causes, you can ensure your Dyson DC40 continues to operate at its best, providing the powerful suction needed for a clean and healthy home.

It is common that blockage get in the hose due to sucking up large debris or moist dart which can cause build in the hose. Sometimes dirt can accumulate in the valve hose if the dust bag or canister is too full. You need to check first if there any blockages in the hose.

Check external hose

First, turn off the vacuum and take apart the wand from the head. Inspect the extended hose part by part to find any blockages. Next, examine the wand for any obstructions.

Then, take off the hose from the vacuum by pressing the button on the base. See if there any debris where the main hose attaches. 

Split in the external hose

Dyson vacuum hoses can split due to regular wear and tear, sharp bends, and suction pressure caused by a clog, or picking up large or hard objects.

One common reason is wear and tear due to regular use. Over time, the hose may crack or split, particularly near the connections between the hose and other parts of the vacuum. If the hose is twisted or bent at a sharp angle, this can also cause it to split or tear.

Split hose solution

If the split is small, it may be possible to use duct tape to fix the issue temporarily. But overtime under the suction pressure it may not survive for long. There is no other option without a replacement hose in case of larger split. Buy aftermarket hose assembly for your DC41 from Amazon.

If there is no issue with the main hose, we need to look at internal hose.

Step-by-Step Guide to Fixing No Suction Issues in Your Dyson DC40

Checking and Clearing Blockages

Blockages in the hose or vacuum pathways can significantly reduce suction power. Follow these steps to inspect and clear any blockages:

1. Turn Off and Unplug: Always start by turning off your vacuum and unplugging it from the power source to ensure safety.
2. Detach the Hose: Remove the hose from the vacuum. Consult your Dyson DC40 manual if you’re unsure how to do this safely.
3. Inspect Visually: Look through the hose for any visible blockages. Use a flashlight to help spot hidden debris.
4. Remove Blockages: Gently use a long, flexible tool, such as a straightened coat hanger, to remove any obstructions. Be careful not to damage the hose.
5. Check Other Areas: Don’t forget to inspect the vacuum’s head, attachments, and entry points for blockages. Clear away any debris you find.
6. Reattach the Hose: Once clear, reattach the hose securely to the vacuum.

Cleaning or Replacing Filters

A clean filter is crucial for maintaining strong suction. Here’s how to clean or replace your Dyson DC40 filters:

1. Locate the Filter: Find the filter location on your vacuum. The Dyson DC40 typically has one washable filter located near the cyclone assembly.
2. Remove the Filter: Carefully take the filter out of the vacuum.
3. Wash the Filter: Rinse the filter under cold running water until the water runs clear. Do not use detergents or wash in a dishwasher.
4. Dry Completely: Let the filter dry completely for at least 24 hours in a warm place with good airflow. Never reinstall a wet filter.
5. Replace if Necessary: If the filter is damaged or excessively worn, replace it with a new one specific to the Dyson DC40 model.

Inspecting and Sealing Air Leaks

Air leaks can drastically reduce the vacuum’s suction power. To inspect and seal leaks:

1. Inspect the Hose: Check the hose for any cracks, holes, or signs of wear. Listen for hissing sounds that indicate air leaks.
2. Check Connections: Ensure all connections between the hose, wand, and vacuum body are tight and secure.
3. Seal Leaks: If you find small holes or cracks, you can temporarily seal them with duct tape. However, for a long-term solution, replace the damaged part.

Regular Maintenance Tips

To prevent suction issues and keep your vacuum running smoothly, follow these regular maintenance tips:

• Empty the Bin Regularly: Don’t wait for the bin to be full before emptying it. A fuller bin can restrict airflow and reduce suction.
• Check for Blockages Frequently: Make it a habit to check for and clear blockages regularly, especially if you vacuum heavy debris or hair.
• Clean Filters Monthly: Wash the filter at least once a month and replace it as needed to ensure optimal performance.
• Inspect for Wear and Tear: Regularly check all parts of your vacuum for signs of damage or wear, and replace them as necessary.

By following these steps, you can resolve most suction issues and maintain the performance of your Dyson DC40, ensuring it continues to provide the deep clean your home deserves.

Split in the internal hose

After taking care of the main hose if it’s still losing suction, most probably your Dyson DC40 has split in the internal hose.

You need to check it by following steps:

Internal hose replacement guide

First of all, you need a replacement internal hose for your Dyson DC40, purchase Dyson red hose from Amazon.

Here is how to do it

First, detach the lower duct assembly by pulling it downwards. Then, pull the hose away from the changeover valve.

Then replace the bin by aligning it with the cyclone handle and pushing it back into place until it clicks.

Test hose suction

Check the suction power of the hose by removing the handle and testing the suction. If the hose suction is good, the problem may be a blockage in the wand handle

If you still having the issue, there might be clogs in the filter. You need to clean the filter as well.

Dirty or clogged filters can reduce the suction power of your Dyson DC40. You can clean your filters by removing them from your machine and washing them with cold water. Allow the filters to dry completely before putting them back in your machine. If your filters are damaged or worn out, you may need to replace them. If you need details guide on cleaning or replacing Dyson’s filters, read our details guide. 

Clean the filters

After cleaning the filter and all the blockages from hose and wand, if you can’t feel air coming from the filter, there is most likely a problem with the motor. 

Check suction motor

If your vacuum cleaner still can’t pick up dust and debris despite trying all the previous steps, there’s a chance that the vacuum’s motor may have a fault. 

If your DC 41 still running in the 5 years, we recommend you to get service from Dyson support. They can help diagnose the problem and provide the necessary repairs to ensure that your vacuum cleaner is working effectively again.

Few tips on maintain regular suction:

Bottom Line

As you learn by now, Dyson’s no suction issue can be fixed easily if you can detect the problem. Replacing the internal hose could be a bit complex for a newb. But you do not need to be a technician to start with.

You just need some tools and the right guides to do that. And this post is going to help you to troubleshoot no Dyson’s suction issue.