Dyson Air Quality Sensor Problem: Causes & Solution in 2023

Dyson air purifiers are popular for their sleek design and high-quality performance. But like any other piece of technology, they can experience problems. If you’re facing the dyson air quality sensor problems, don’t worry – we’re here to help. In this blog post, we’ll explain what the air quality sensor is, and give you some tips on how to fix common problems. Keep reading to learn more!

Fixing Process of Dyson Air Quality Sensor Problem:

There are a few things you can do when the air quality sensor is reporting incorrect information. This usually happens because the sensor has become blocked by dust and dirt. Although it’s not too problematic if left alone, we do recommend that you clean it on occasion for optimal performance. Try these steps:

1) Sensor Location

The sensors are located behind the cutouts of all Dyson purifying fans. In most cases, if you look at the front of the fan and then turn it around, you’ll find the sensors at the back.

Based on the model, some Dyson Pure Cool fans have the cutouts on the right side. In addition, some models have holes in different places.

2) Cleaning of Dyson air purifier sensor

First, turn off your fan by unplugging it. Then you can start cleaning it. Before you use the fan, I recommend giving it a good cleaning. I cleaned around the ports and over the perforated filter enclosure utilizing the vacuum cleaner’s dusting brush.

3) Remove The Dust Partials

Use a damp cloth or hand-held vacuum cleaner to remove any visible dust from the lens (the round glass part).

Follow this up with an electronic air duster (available at electronics stores like Best Buy). Use short bursts of air around the lens until there is no sign of dirt or grime. Once done, turn off your purifier and unplug it.

I would suggest you get a friend to help you seal the air gaps around the nozzle. Repeat this for any other sensor ports you have, giving each one a good 10 seconds or so.

4) Dusting Can Be Done Using A Dusting Brush (dry):

A dry brush provides a range of cleaning functions and can be used for the procedure as well. First, you need to brush the holes out (push the brush into the openings as you clean). Then, any dust should be eliminated instantly with an over sized brush.

5) Restart Your Fan

Reconnect the fan, then switch it on. Your air level sensor will start taking accurate readings within seconds, and your fan should now show air levels returning to normal. At the very least, you will not have a severe reading, and PM levels should gradually drop as the fan runs.

6) Power The Device Back On

Restart it and allow it to work usually. If you have done this correctly, the severity reading should instantly drop from 999 to an accurate reading.

Quick Guide:

We recommend vacuuming at the front of the Dyson grill, around the controls, and around the central fan head as well. The fan can also be cleaned with a damp microfiber cloth. It would be best to clean around the sensor ports, but don’t put anything through them.

Here are some helpful tips for Dyson’s air quality sensor

Cleaning The Filter As Necessary:

Sometimes cleaning the filter is needed to solve the problem. The filter should be removed and then vacuumed. Check to see if the air quality sensor working again after reinstalling it.

Try Hard To Breathe:

You may still have problems if the area was not cleaned properly. Turn it off again, then blow really hard compressed air into the slits. By using this method, the dirt trapped inside will be easily removed.

Perform A Hard Reset

If that does not work, you may need to reset the unit and then blow it into one of the sensor holes.

Following are the steps for performing a hard reset:

  • Take the power cord out of the machine.
  • Reinstall the power cord while holding the power button on the device.
  • Wait until the display screen starts to flash before releasing the power button.
  • PM still occurs at a Severe level, 

Follow the steps above again to make sure you’ve removed everything. In case none of these work, you probably need to call Dyson customer support via phone.

What Is The Air Quality Sensor?

The air quality sensor is an advanced feature on all Dyson purifiers. It measures humidity, temperature and volatile organic compounds (VOCs) in the air to determine what type of pollutants may be present. It then uses this information to adjust your purifier’s settings accordingly. For example, if the sensor detects high levels of VOCs, it’ll run at maximum speed.

Dyson air quality sensor problem Causes &
Troubleshooting Problems

According to Dyson there are several causes of the Dyson air quality sensor problem, but here are some of the most common.

1) Dirty Filter: The filter is the most important part of an air purifier. If it’s clogged, dirty or damaged, it won’t be able to remove pollutants from the surrounding air.

Check the filter regularly and replace if it looks worn out or damaged, or after every 6 months (whichever comes first). Remember that this is only for pre-AC 44 models – later models have “lifetime” filters that don’t require replacement.

2) Room too small: Another common cause of problems with your Dyson air quality sensor is a room with poor airflow. If the sensor feels too confined, it may stop working or behave erratically. Fix this by opening a window or door to let in some fresh air.

3) Sensor blocked: If you’ve placed furniture in front of your Dyson purifier, there’s a chance that the sensor has been blocked and is no longer sensing the surrounding air correctly. Check for clear airflow around your purifier and make sure that nothing is obstructing its view (including any sensors!).

4) Incorrect setting: Each Dyson model has different settings for different pollutants, including VOCs and humidity. Make sure you’re using the correct setting when turning on your purifier so that it knows how to filter the surrounding air effectively.

5) Sensor damaged: If you’ve checked your purifier and made sure everything is in order, it’s possible that the sensor has stopped working entirely. Fix this by replacing the air quality sensor…

Related Article: Dyson hp01 vs hp02 vs hp04 , Dyson Air Purifier Troubleshooting 

What is Dyson pure cool air quality sensor 999 problem?

The Dyson air quality sensor 999 problem is primarily resolved by simply clean Dyson air purifier sensor. When you notice that your fan has turned on, PM2 is showing.

So you don’t need to panic if your sensor reports levels of PM10 and PM5, which could indicate that your air is filthy, but rather it is clogged.

Tiny particles of dust, or particulates (PM), can irritate the respiratory system and trigger asthma attacks.

The sensors in Dyson distinguish between small (PM2.5) and large (PM10) particles, and each is given a reading.


What Models Does This Solution Work For?

Dyson Pure Cool Tower TP04 & DP04, Dyson DP05, Dyson Pure Cool HP01, HP02, HP03, HP04, HP05 and many others are compatible with this fixing solution.

What causes the sensor to work improperly?

The air purifier needs to be cleaned from the outside when you clean the room If you don’t do that properly it will cause the Dyson air quality sensor problems. If the Dyson sensor is covered in dust, it will not function properly.

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