If your LG dryer is displaying the D90 code, you’re probably wondering what to do. If you’re not sure why your dryer is making this abnormal sound or flashing the D90 error code, don’t worry. This is an easy fix, and it won’t cost you a fortune to repair your dryer.
If you see error code D90 on your LG dryer control panel, your dryer is indicating a 90% blockage in the duct work, which means you need to call a repair expert immediately.
LG dryer model D90 appears to have an issue with the vent hose or vent line having a 90% blockage. The only other thing it could be is a faulty heating element or burnt thermal fuse.
To make your dryer run as smoothly and efficiently as possible, check to see if your exhaust pipe is clear. Lint build-up and other debris in the pipe can prevent your dryer from staying cool and running correctly — causing excess heat and longer drying times.
LG Dryer D90 Code – Troubleshoot And Diagnosis
LG dryers have a superb product. Flow Sense is the first and only industry technology that will let you know when your dryer is completely clogged and needs to be serviced.
Using this feature, LG’s machine can spot clogs before they become too serious, preventing them from causing potentially damaging blockages within the machine itself.
With four white bars that illuminate to indicate the level of airflow, you’ll know when you’ve got an 80 percent blockage.
At that juncture, there will be four bars displaying with a d90 or d80 error code.
Dryers are notorious for clogging up with lint and other debris. However, the LG dryer is designed to run at an 80 percent level of clogging before stopping.
As the airflow restriction increases, you will see more bars on the display and a LG dryer d90 error light. At 90 percent clog, you will see the four bars and the error light.
When everything is going smoothly, the dryer will have no issues. But, if a clog forms within the machine after months of use, the dryer will enter “self-protect mode.”
This means that the system will shut off as a safety precaution. If the dryer senses that something is wrong, it will check the diagnostics before it will attempt to turn it back on.
This will protect the dryer from damage and prolong its life. If there are any major issues, the dryer will tell you to pull out the manual and troubleshoot the problem.
Before you begin, remember to unplug your appliance or turn it off at the power source if it is plugged in.
1. Clean The Lint Filter
A lint filter catches lint, hair, and other debris that comes off of clothing during the drying cycle. Lint can build up in the filter, reducing its effectiveness. Cleaning the lint filter after each use helps extend the life of the dryer and prevents fires.
Always check the lint filter at the back of your dryer to make sure it’s clean. If you find lint or debris, remove it with a vacuum. It’s normal for the lint filter to fill up quickly — even after just one cycle — especially if your dryer vent isn’t connected properly.
Do not use your dryer without a lint filter as this could cause a fire. Always clean the lint filter before each use. To clean the filter, remove it from the dryer and gently brush away any lint with your fingers or a paper towel. If the filter is very dirty, you can wash it with warm, soapy water.
2. Exhaust Hose Issue
The exhaust hose is made of plastic material or a similar material that can withstand dryer heat. The hose is used to connect the dryer to the exhaust vent. The hose is flexible and can be easily routed through small openings.
It is used to vent the hot, moist air from the inside of the machine to the outside. This helps to prevent the machine from overheating and damaging the clothing inside.
Lint buildup from a clogged dryer vent could have caused this fire. Be sure the vent hose is completely clear and not kinked or twisted.
A dryer exhaust hose should be cleaned at least once a year, and more often if it starts to show signs of lint buildup. The best way to clean a dryer exhaust hose is to use a vacuum cleaner with a hose attachment.
First, detach the dryer exhaust hose from the dryer and the exhaust vent.
Next, use the vacuum cleaner to remove any lint from the hose. Finally, reattach the hose to the dryer and the vent.
3. Inspect Wall Duct
The wall duct in a dryer vent serves as a passageway for hot air and lint to travel from the dryer to the outdoors. It also helps to prevent outside air from entering the home through the dryer vent.
You should check your dryer vent regularly, especially if you have clogged it.
First step is to remove the exhaust hose from the dryer wall duct and inspect it for any debris that may be blocking its functioning. Lint builds up in the hose over time and any build-up of lint obstructs airflow through this area.
It is possible that a large piece of lint may get stuck, preventing airflow through the wall.
If you can’t find a clog, you can try using a leaf blower hose attachment to look inside the pipe.
4. Check Outside Vent
The function of an outside vent in a dryer is to allow air to flow out of the dryer and into the atmosphere. This allows the dryer to operate more efficiently and prevents the build-up of lint and other debris inside the dryer.
Dryer vents are typically located on the exterior of homes, opposite the interior wall vent. This allows for the proper circulation of air to and from the dryer.
Inspect the lint vent of your dryer and look for any blockages. You can clean this out with a small hand brush or other cleaning tools. If you suspect that it has hardened due to water damage, try softening the buildup with some warm water and a toothbrush or similar cleaning tool.
Once the vent is clear, take a damp hand towel or cloth and wipe down both the dryer’s interior and its exterior to clean off any dirt or grime buildup. Fyi 95% blockage will give D95 error.
5. Reset The Dryer
If your LG dryer is not working properly, you may need to reset it. To power reset your LG dryer, unplug the dryer from the wall outlet. Then, disconnect the dryer from the power source by removing the dryer’s plug from the dryer outlet.
Next, remove the dryer’s electrical cord from the dryer. Finally, reconnect the dryer to the power source and plug the dryer into the wall outlet.
6. Flip The Circuit Breaker
To reset the circuit breaker of a dryer, first locate the breaker box and identify the breaker that controls the dryer. Once the breaker is located, flip the breaker switch to the “off” position and then back to the “on” position.
7. Load Is Too Small
LG Flow Sense indicator is designed to alert you that there is a restriction in your dryer vent system. This is an important feature of LG dryers that should not be ignored.
The load size may be too small for the algorithm to detect any moisture in the laundry and therefore cannot activate heating or the tumble function.
The dryer sensor can’t detect moisture, so it doesn’t heat up and tumble.
8. Burnt Heating Element
The heating element in a dryer helps to dry clothes by providing heat. The element is usually located near the bottom of the dryer and works by heating up the air that is circulated by the dryer.
If the heating element in your dryer is not working, you will need to replace it. You can test the element by using a multimeter to test for continuity. If there is no continuity, then the element will need to be replaced.
LG Dryer D90 Code But No Blockage
If the heating element has burnt out, the unit will not heat and the D90 code will appear on the display. Locate the heating element on your LG dryer and check for any visible damage.
If the heating element is damaged, replace it with a new one. The thermal fuse is a small white strip of plastic. It is located on the heating element housing.
If the fuse is blown, the dryer will not heat. Remove the fuse and then test it with a multimeter to see if it is in good condition. If the fuse is blown, replace it with a new one. Checking the heating element and the thermal fuse should fix the LG dryer D90 code but no blockage problem.
Hi there! I’m Sam Hendricks, and I’m a repair technician and expert. I created this website to help people like you save money and time by fixing your own appliances.
Over the years, I’ve seen people spend a lot of money on unnecessary repairs or replacements. That’s why I decided to share my expertise and create easy-to-follow guides for fixing appliances on your own.