How to Reset Dyson Air Purifier Filter: A Complete Step-by-Step Guide

Conclusion: Resetting your Dyson air purifier filter is a simple process that usually takes less than ten seconds. Once you have replaced the filter with a genuine Dyson part, you must manually reset the filter life indicator on most models to let the machine know a fresh filter is installed. Without this reset, the purifier will continue to display a filter replacement alert and may not function at its best performance. The exact button sequence depends on your specific model, but for the vast majority of Dyson purifiers (like the Pure Cool series, Hot+Cool, and Big+Quiet models), you need to press and hold the power button or a combination of the standby button and the oscillation button for about 5 to 10 seconds until the filter light or display turns off or resets. If your model has a remote control, you usually press a specific button on that remote instead of on the machine itself. Below, I will explain exactly how to reset filters for different Dyson purifier generations, what to do if the reset does not work, and answer common questions about filter maintenance.

Why resetting the filter indicator is important

Your Dyson air purifier tracks how long the filter has been used. When you replace the old filter with a new one, the machine does not automatically know it is fresh. The internal timer or sensor continues to assume the old filter is still there. That is why you must force a manual reset. If you skip this step, the purifier will still show a flashing filter icon, a red ring, or a message like “Filter needs replacing.” The machine may also reduce airflow or run less efficiently because it thinks the filter is clogged. Some users report the purifier stops working entirely until the reset is completed. So resetting is not optional it is a required step after every filter replacement.

What you need before starting the reset

Before you attempt any reset, you must be sure the new filter is correctly installed. Take out the old filter. Insert the new genuine Dyson filter into the slot. Make sure you push it all the way in until it clicks or sits flush. Close the front cover or the filter door. Plug the purifier back into the power outlet if you unplugged it during the replacement. The machine should be in standby mode (powered on but not blowing air) for the reset to work. Some models require the purifier to be turned on and running, but most need to be in standby. I will clarify this for each model group below.

Resetting Dyson Pure Cool Link (TP02, DP02) and older tower fans

For the Dyson Pure Cool Link tower purifier (model TP02) and the desktop model DP02, the reset uses the remote control. Point the remote at the machine. Press and hold the standby button (the power button with a circle and line symbol) for about 5 seconds while also pressing the button that has two arrows forming a circle (the oscillation button). Hold both simultaneously. You will see the filter icon on the display flash once or the LCD screen show a countdown. Release the buttons when the filter light turns off or the display resets to show the filter life as 100%. If the reset does not work, try pressing just the standby button while the machine is running. On some older firmware, holding the standby button alone for 8 seconds resets the filter. Check your remote for a dedicated filter reset button, which looks like a filter icon with an arrow. If present, press and hold that specific button until the display changes.

Resetting Dyson Pure Cool (TP04, DP04) and Pure Hot+Cool (HP04)

These models have an LCD display on the front. The reset process is slightly different. With the purifier turned on (air blowing), locate the standby button on the machine or the remote. Press and hold the standby button for about 5 to 10 seconds. The LCD screen will show a countdown from 5 to 0, or a message like “Filter reset.” When the countdown finishes, the filter life indicator returns to 100%. Alternatively, you can use the Dyson Link app on your smartphone. Open the app, select your purifier, go to the filter settings, and tap the “Reset” or “Replace filter” option. The app will send a command to the machine to reset the filter timer. This app method works for any Wi-Fi connected Dyson purifier. Make sure your phone and the purifier are on the same Wi-Fi network. If the app shows the filter is still expired, close the app completely and reopen it, then try the reset command again.

Resetting Dyson Pure Hot+Cool Cryptomic (HP06, HP07, HP09)

The Cryptomic models use a special catalytic filter for formaldehyde removal. They have a separate reset for the main HEPA filter and the Cryptomic filter. First, replace the main HEPA filter. Then, on the machine’s screen, press the standby button for 10 seconds. The screen will prompt you to confirm the filter replacement. Use the plus and minus buttons to select “Yes” and then press the standby button again to confirm. For the Cryptomic filter, which rarely needs replacement, the reset is similar but you select “Cryptomic filter reset” from the menu. If your model has a simple remote without a screen menu, press the standby button and the oscillation button simultaneously for 10 seconds. The display will show a filter icon and then reset.

Resetting Dyson Pure Cool Me (TP07) and Purifier Humidify+Cool (PH01, PH02)

The Pure Cool Me model does not have a complex display. It only has one button. To reset the filter, turn the machine on. Press and hold the power button for about 6 seconds. The filter light (which is a small LED) will blink red three times and then turn off. That means the reset is successful. For the Dyson Purifier Humidify+Cool (PH01, PH02), the humidifier filter and the air filter are separate. You must reset both after replacing each. On the remote, press and hold the standby button for 10 seconds. A menu will appear on the LCD. Use the plus/minus to select “Air filter reset” or “Humidifier filter reset.” Select the one you replaced and confirm. If you do not have a remote, use the Dyson app to reset each filter individually.

Resetting Dyson Big+Quiet (BP01, BP03)

These are very large purifiers made for open floor plans. On the front of the machine, you will see a small button labeled “Filter reset” or a button with a filter icon. Some models have a pinhole next to the power cord. Use a paperclip or a thin object to press inside the pinhole for 5 seconds. You should hear a beep, and the filter indicator light will turn green. If there is a visible button, press and hold it for 8 seconds. The LED ring around the fan will change from red to blue or white to confirm. The Big+Quiet models also have a reset option through the Dyson app if you prefer.

Common reset problems and how to fix them

If you pressed the buttons correctly but the filter light remains red or the display still says “Replace filter,” do not worry. Here are the most common issues and their solutions.

  1. Wrong buttons or sequence. Check your model number. Different Dyson purifiers use different combinations. For example, holding the standby button alone works on some models but pressing the oscillation button is required on others. Look at the sticker on the back or bottom of your machine to find the exact model number, then search online for the official Dyson filter reset guide for that model.

  2. Machine is not in the correct mode. Most resets require the machine to be in standby (powered on but fan not spinning) or running at low speed. If the machine is off (unplugged) or in high fan speed, the reset may not register. Turn the fan to the lowest setting or leave it on standby.

  3. Remote control batteries are low. If you use a remote, weak batteries can cause the signal to be too weak to complete the reset. Replace the batteries with fresh ones and try again. Point the remote directly at the purifier’s IR receiver (usually the dark window on the front) from less than 3 feet away.

  4. Filter is not seated properly. The machine sometimes fails to detect the new filter if it is not pushed all the way into the slot. Remove the filter, check that the plastic sealing tabs are intact, and reinsert it firmly. On some models, you must twist the filter clockwise until it locks.

  5. Firmware needs an update. Older software on Wi-Fi models can cause reset failures. Connect your purifier to the Dyson app and check for firmware updates. If an update is available, install it and then try the reset again.

  6. Multiple filters need resetting. Some models have a pre-filter and a main filter. If you replaced both but only reset one, the machine will still show a warning. Reset all the filters that you replaced.

  7. You are using a counterfeit filter. Non-genuine filters sometimes lack the RFID chip that some Dyson models use to automatically detect a new filter. If your purifier has an auto-detect sensor (common in newer models like the HP09), it may refuse to reset if it does not see the chip. In that case, you must use a genuine Dyson filter. If you already have a third-party filter, you might need to wrap the filter with a piece of foil or tape around the RFID area to trick the sensor, but this is not recommended because it can affect airflow. The best solution is to buy an official Dyson replacement filter.

What to do if the reset still does not work after all fixes

Rarely, the reset process fails due to an internal electronic issue. Try a hard reboot. Unplug the purifier from the wall outlet. Wait 60 seconds. Plug it back in. Then repeat the reset steps. If the problem persists, use the Dyson app to reset instead. If the app also fails, the machine’s internal memory may be corrupted. In that case, contact Dyson customer support. They can walk you through a factory reset that wipes all data, including the filter timer. A factory reset is done by pressing a combination of buttons while the machine is unplugged and then plugging it in while holding the buttons. Dyson support will give you the exact code for your model. Do not attempt a factory reset without support guidance, as it may erase your Wi-Fi settings and custom preferences.

When to replace the Dyson filter before resetting

Resetting the filter without actually replacing it is useless. The filter life indicator is only a reminder. It does not measure actual air quality. Dyson recommends replacing the HEPA filter every 12 months based on average usage of 12 hours per day. If you use the purifier 24/7, you should replace it every 6 to 9 months. If you live in a polluted area or have pets, replace it more frequently. Some Dyson models with real-time air quality sensors will tell you the filter is clogged based on reduced airflow, not just time. So even if the indicator says 100% after a reset, the actual filter may still be dirty if you did not replace it. Only reset after you have physically installed a new filter.

How to check if your Dyson model supports auto-reset

A few newer Dyson purifiers (like the Dyson Purifier Big+Quiet Formaldehyde and some hot+cool models from 2023 onwards) have an automatic filter reset feature. When you insert a genuine Dyson filter, the machine detects the embedded RFID tag and automatically resets the filter life without you pressing any buttons. In this case, you do not need to do anything. The filter icon will disappear by itself within a few minutes. However, if you use a non-genuine filter, the auto-reset will not happen, and you must manually reset. Check your user manual to see if auto-reset is listed.

Summary of reset methods by model series

For Dyson Pure Cool Link (TP, DP, and some HP models without LCD): Use the remote. Press and hold standby + oscillation for 5 seconds.

For Dyson Pure Cool and Pure Hot+Cool with LCD (TP04, DP04, HP04, HP05): Press and hold standby on the machine for 10 seconds or reset via the app.

For Dyson Cryptomic (HP06, HP07, HP09): Use the on-screen menu or press standby + oscillation.

For Dyson Pure Cool Me (TP07): Press and hold the power button on the machine for 6 seconds.

For Dyson Purifier Humidify+Cool (PH01, PH02, PH03): Use the app or the remote’s standby button with menu selection.

For Dyson Big+Quiet (BP01, BP03): Press the filter reset button or use a pinhole reset.

Remember, if your purifier is connected to Wi-Fi, the Dyson Link app is the easiest and most reliable method. It gives you a visual confirmation that the filter has been reset. The app will also show you the remaining filter life as a percentage, so you can plan your next replacement.

Final practical tip

Do not reset the filter indicator as a way to bypass a filter replacement warning without actually changing the filter. The filter is the heart of the air purifier. A dirty filter cannot trap fine particles, VOCs, or allergens. You might think you saved money, but you are actually breathing unfiltered air. The motor also works harder to push air through a clogged filter, which shortens the life of your machine. So always replace the filter first, then reset. Your Dyson purifier will then work like new again. If you ever lose the remote control for your Dyson, you can still reset some models by using the buttons on the machine itself, or you can buy a replacement remote from Dyson’s website or a third-party seller. Alternatively, use the app if your model supports it. Some users also find that pointing a universal remote at the purifier and pressing the power button for an extended time works, but this is not guaranteed. For the most reliable result, stick to the official Dyson reset method for your exact model.


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