Why Does My (Shark) Air Purifier Turn Itself Off? 5 Simple Checks

If your Shark air purifier keeps turning off, definitely, something could be amiss. However, as it turns out, there is no need to worry, because some of the causes are easy to troubleshoot, and fix.

In the past, I have looked at the reasons why Honeywell air purifier keeps shutting down. Some of the most common reasons include clogged HEPA filters, the unit is overheating for working too long, or it could be having factory defects. If the Shark air purifier is too old, it can start going off after running for a short time.

If you intend to buy an air purifier such as the Shark HP102PET Clean Sense Air Purifier from Amazon.com, go ahead.

This is a good brand name and even the problems commonly associated with them are easy to fix, and they only occur in isolated cases.

This air cleaning unit monitors the air quality, and you can use it to remove practically every kind of pollutant. You can also use the air purifier to remove cigarette smoke.

Even the other common indoor allergens such as pet dander, pollen, fur, and dust will no longer bother you when you invest in this air purifier. It can also remove formaldehyde from the air, as well as other VOC.

Shark Air Purifier keeps turning off: Troubleshooting

When your air purifier refuses what it is supposed to do, knowing how to fix the air purifier can help. Do not toss into the trash bin just yet. Find out whether it is possible to revive it.

Your air purifier could have many problems. However, here, we are going to look specifically at the issue of air purifiers shutting down all the time.

Shark air purifier not turning on: Check the power

After the air purifier shuts off, does it turn back on? And then it shuts off again? Or does it simply refuse to turn on?

If you have any appliance plugged into a power outlet, but it does not turn on, you could start by plugging it into another power outlet. Once it turns on, then the power outlet is bad.

If the purifier still does not turn on in another outlet, plug in a different appliance. If it turns on, you need to check the power cord of your Honeywell air purifier.

It might have blown a fuse in the power cord, or the power cord could be worn out. In that case, you just need to replace the cord with another, and you will be good to go.

If the unit is still under warranty, you can contact the manufacturer or the supplier via phone or email.

You might also want to check whether the power outlet has the rating recommended for your air purifier. If it does not, find one that fits.

Unit shuts off when filters are clogged

When your air purifier is not working properly, it keeps shutting off. The main cause of this problem is clogged filters.

When the Shark air purifier keeps shutting off, you should access the filters and see whether they are clogged.

If you live in a place that has clogged air, you will need to change the HEPA filters more often than a person who lives in a fairly clean area.

For your unit to work properly, it draws the polluted air through its filters. The pollutants are trapped in the filter while the clean air flows out, to be blown back into the room.

Thus, as a safety measure, the purifier might shut down to prevent damage to its parts. When you change the filters, you will find that it starts working again.

The best thing to do here is to adhere to the manufacturer’s instructions regarding when to change the filters. In very polluted environments, you might have to change the filters once a week.

Check the user manual to see how often to replace the filters.

Recommended filter replacement time is once 6 to 12 months. But if you are in a very polluted neighborhood, you can replace the filter every 3 months.

Shark air purifier shuts down when it overheats

To find out whether overheating can make the air purifier shut off, you should find out whether it works again all right after it has cooled down. If yes, you have to find out why it is overheating.

First, find out whether you are overworking the unit. This means running it longer than necessary or using a small unit for a large space.

If the purifier gets too hot, it might go into safe mode, which is shutting off in this case, to protect its delicate components from damage.

If it is too small and there is a lot of stuff such as dust to clear from the air, it could experience overheating.

Also, check that the air purifier filters are not clogged, which is likely to happen when there is too much dust in the air.

Manufacturing Defects

Popular products are always counterfeited. Therefore, if you did not buy your product from the company, you could end up with a substandard air purifier while all the time thinking that you have the real one.

Some people have complained that after their humidifier shutting off after every 20 or 30 minutes of operation, they opened it up. They found the wiring to be so poor such that it posed a fire risk.

In such cases, it is only during return (if still under warranty), that you find it is not a Shark product.

This does not mean that a genuine Shark air purifier cannot start having issues. If you have followed the user manual, entered the correct settings, plugged it in correctly to the right outlet, has new filters, and it still has issues, it might fail to work properly could be having manufacturing defects.

If it is under warranty, they will fix it free of charge or send you a replacement. But if the warranty is expired, you can still call or email SharkNinja so that they can direct you to the closest repair center.

You did not reset the filter life timer

No one has reported this as an issue yet, but you know you can never be too careful. After replacing the filter, you should plug the air purifier back in, and give it time to calibrate.

After that, press and hold the filter life timer button for three seconds before releasing it. The filter lifetime will have reset by then. To confirm this, the machine gives a beep.

Remember, do not attempt to clean the air purifier filter. Once it is due for replacement, remove it, place it in a plastic bag and dispose of it.

When the unit is too old

Have you thought about how many years you have had this air purifier? You might clean the filter but still find that it keeps shutting off.

Perhaps it is time to give it a rest and buy another one. Air purifiers with HEPA filters can last between 3 and 5 years.

If there is no large particulate matter in your air, it can last up to 5 years. If there is a lot of pollution, it can last less than 5 years.

Thus, when your Shark air purifier won’t turn on, check how long you have had it. If it has lasted five years or longer of consistent use, there is no need to repair it.

Be sure to check my old posts on:

Can An Air Purifier Cause A Sore Throat?

Air Purifier Or Dehumidifier For Musty Smell?

Can You Use An Air Purifier In Summer?

Do Air Purifiers Make A Difference?

Is Air Purifier Good For Mold?

Why Your Air Purifier Smells Bad Like Wet Dog

Air Purifier Not Turning On: Check The Power

Best Air Purifier For Cat Litter Dust And Odor


Many issues make a Levoit air purifier go off all the time, and equally many cause the same issues in a Shark air purifier filter.

But to keep your unit in super working condition, find out how to do Shark air purifier filter replacement.

If something needs fixing in the air purifier, you can follow this guide.