Why Is the Light Flashing on a Friedrich Air Purifier? [Solution]

Last Updated on May 22, 2023

A lot of guessing work has been eliminated due to air purifier manufacturers adding an indicator on their devices. They offer meaningful information about the problems of the devices. But, if you do not understand these indicators, they will be useless to you. The lights on the Friedrich air purifiers are a perfect example of it.

Without knowing why is the light flashing on a Friedrich air purifier, you can get to the bottom of the issue. And when the lights flash, it generally means that the filter is about to end its lifespan, and you will need to replace it.

But there are two types of flashing alerts on the Friedrich air purifiers. Each has a different meaning. And by giving this article a read, you can learn about both!

The Flashing Alert of Friedrich Air Purifiers

One of Friedrich air purifiers’ smart features is the indicator light they come with. Its primary task is to let you know when the filter will require a replacement and to offer you information regarding the air quality.

As we have mentioned earlier, you can come across two types of flashing alerts. The first one is just a regular flashing of the indicator, and the second one will come with a buzzing sound. And in this segment, we will let you know what each of them means.

Filter Alert Without Any Buzz

When the filter alert flashes without any buzzing sound, it states that the filter is about to meet the end of its lifespan. It has collected enough dust and pollutants from the air and will get clogged soon. This alert is also the first of the two alerts the air purifier offers with the indicator.

However, you can continue to use the air purifier with this light flashing. Although the air purifier will not be capable of effectively filtering the air, it will still run with a weak filter.

Filter Alert with a Buzz

The air purifier will start the second alert if you do not change the filter after the initial alert. This one is a little different than the first indicator. For this, the light will flash, and you will hear a beeping sound every 30 minutes. But why does the air purifier gets so aggressive with the second alert?

Well, this alert states that the filter is pretty much a gone case. It is almost clogged, if not fully. And you should change the filter as soon as possible. Also, it would be a good idea not to use the device when this alert is on. Running the air purifier with a worn-down filter can cause serious health complications.

What Happens When You Ignore the Second Alert?

So, what will happen if you do not change the filter even when the indicator is going crazy? Well, the air purifier will get into the filter replacement locking mode. In this mode, the device will not work at all. And if you end up with this, you should not wait any longer. Get a replacement and remove the old filter right away.

How to Replace the Filter of Friedrich Air Purifier?

You need to get a new filter and replace the old one when you see the flashing alert with or without the buzzing sounds. Here are the steps to do so:

Step 1: Turn the Friedrich Air Purifier Off

Firstly, you will need to turn the device off. Pressing and holding the on/off button for a while will do the trick. Also, do not forget to unplug the power cord from the power outlet. That is crucial as well.

Step 2: Remove the Old Filter

Grab both sides of the front cover door and open it by pulling it down and towards you. After opening it, you should be capable of seeing the filter. In fact, the inside part of the door will also have instructions to remove the filtration unit.

Nonetheless, you will need to carefully pull the filter out by lifting it up and pulling the bottom portion towards you.

Step 3: Install the New Filter

Before you put the new filter back in place, you need to remove the filter grip. It might take a little force to get it off, but it will come out eventually. Place the new filter inside the housing and lay the carbon filter in the cassette. When you are closing the cassette, ensure that the filter is seated properly and it latches in place.

Make sure to put the filter grip back in. That will ensure proper sealing. Also, do not put too much force while putting the grip in place because you will damage the new filter by doing so.

Step 4: Turn the Air Purifier Back on

After putting the new filter back in place, you need to reset the filter notification. For this, you can press the reset button that is on the remote. Press and hold it for two seconds. Alternatively, you can press and hold the reset button that is on the air quality sensor inlet. Hold it down for two seconds as well.

When the filter rests, the buzzer should go off one time. And when you hear the buzzer, you can be sure that the filter notification has reset.

Final Words

Seeing unusual activity on the control panel and can not help but wonder why is the light flashing on a Friedrich air purifier?

Well, the long story short is that the light will flash when the filter requires a replacement. It should flash without sound for the first time and with a buzzing sound for the second alert. Replace the filter within these two alerts. And if you do not, the air purifier will get into a filter replacement lock, which will make it operational.

Photo of author

Paul M Walker

I, Paul M Walker, am the founder and the author of this little site you are currently on. I work to provide readers with no-fuss and easy-to-follow solutions regarding common air purifier and humidifier problems.

Leave a Comment