LG Dryer Error Code D90: How to Fix It

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LG manufactures some of the best dryers on the market. All of their modern appliances come with built-in diagnostic monitoring systems that display specific error codes when something is wrong with your dryer. 

One error code is D90. This code indicates a problem with the airflow through the ventilation system in your dryer. Thankfully, it is also one of the easiest error codes to remove, and you should be able to do it yourself without having to call a technician to come to your house.

In this article, we will discuss what the error code means, how you can remove it, and finally how you can keep it from happening.

This article covers all major LG dryer models, including:

DLE0442W

DLE2701V

DLE3777W

DLEX2801L

DLEX2801R

DLEX2801W

DLEX2901V

DLEX3001P

DLEX3001W

DLEX3360R

DLEX3360V

DLEX3360W

DLEX3470V

DLEX3470W

DLEX3550V

DLEX3550W

DLG5932S

DLG5988B

DLG5988S

DLG5988SM

DLG5988W

What does the D90 error code mean?

If the display panel on your LG dryer is displaying the D90 error code, it means the airflow through your dryer’s ventilation system is obstructed, and hot air cannot exit your dryer through the vent. The code is caused by a build-up of lint or other debris in the ventilation system.

The “90” after the “D” indicates that the system is obstructed by 90%. Similar error codes include D80 and D95, which indicate an obstruction of 80% and 95%, respectively.

If you are seeing a D90 error code, it’s recommended that you stop using your dryer immediately. This is because a build-up of lint is a serious fire risk. It is one of the leading causes of house fires in the USA.

How to fix the D90 error code in your LG dryer

To remove the D90 error code and get your dryer working again, you need to clean out the ventilation system. Once you give it a good clean, airflow will increase, and the error code will go away.

You can remove the D90 error code by following these steps:

  1. Switch the power off to your dryer.
  2. Locate the lint filter and remove it. Give the filter a thorough clean, and then place it back into the dryer.
  3. Once the lint filter has been cleaned, the next step is to pull your dryer out from the wall and disconnect the exhaust hose from the back of the dryer and, if possible, from the other end as well. Once disconnected, clean the hose out by either vacuuming it out or shaking it out into a trash can.
  4. Once the hose has been cleaned out, use a vacuum cleaner to remove any lint from the wall duct and from around the dryer.
  5. If you have access to it, go outside and clean the vent from the outside end as well.
  6. Once every component of the ventilation system has been cleaned, reattach each part and put your dryer back into position.
  7. Turn your dryer back on, and check if the error code has gone. If not, reset your dryer, and that should fix the problem.

How to prevent the D90 error code 

To ensure the D90 error code doesn’t appear again, it’s recommended that you give your dryer’s ventilation system a clean regularly. To help you out, we thought we would give you some tips to make this process easier.

  • Every time you use your dryer, take the lint filter out, and give it a quick clean by emptying out any lint. When you do this, you will avoid lint building up, which ensures your dryer will work more efficiently.
  • If you see any lint on the outside of your dryer, use a damp cloth and wipe it up. This will stop lint from potentially getting into your dryer.

Every few months, perform a deep clean of your dryer’s ventilation system by following the steps that we outlined in the section above.

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