Why Your Dryer’s Lint Light Won’t Turn Off: 5 Steps to Fix

Dyer lint light stuck on

Is your dryer’s lint light stuck on?

I’ve been there too! I know how annoying it can be when the dryer lint light won’t turn off, especially when the filter is clean.

Don’t worry, though. You’ve come to the right place to fix the issue.

If your dryer’s lint light won’t turn off, you’ll need to double-check that the filter is clean and properly installed, perform a reset, and inspect the venting system. However, if the issue persists, please test the thermistor or check the control board.

Keep reading to fix the problem!

Why trust us? This article was written by Craig Anderson and James Blackford.

Craig has helped thousands of other homeowners repair their appliances since 2016.

James is one of our resident appliance experts with over 16 years of experience. He currently works as a Master Technician for SquareTrade, and runs his own appliance repair business.

Dryer Lint Light Stuck on? Try These 5 Fixes

If your dryer’s lint light refuses to turn off, don’t worry! In this section, I’ll walk you through five different solutions you can try.

Lint can cause airflow issues, reduce your dryer’s efficiency, and increase your energy bills. Therefore, many modern dryers will activate the lint light as a reminder to ensure the filter is clean and free of lint buildup.

However, if the lint light won’t turn off even after you’ve cleaned the filter, chances are there’s an issue with your dryer. Read on to learn how to fix it!

#1 Double-Check the Lint Filter

When fixing a dryer’s lint light that won’t turn off, I always start by double-checking the lint filter.

Sometimes, even a small amount of lint that has been overlooked can trigger the lint light. Therefore, it’s important to double-check that you haven’t missed any spots.

Follow these simple steps to deep clean your dryer’s filter:

  1. Locate the lint filter, which is typically inside the door or on top of the dryer. Then, remove the filter by gently pulling it straight up.
  2. Use your fingers to peel away the lint layer from the filter. You can also use a soft microfiber cloth.
  3. To deep clean the lint filter, please scrub it gently. I recommend using warm water, an old toothbrush, and a mild detergent.
  4. Rinse both sides of the filter and let it air dry completely to prevent mold and unpleasant odors.
  5. Vacuum the slot or housing area where the filter sits to prevent triggering the lint light again.
Cleaning dryer lint filter
If your dryer’s lint light is turned on, deep clean the filter and its housing.

If your dryer’s lint light is still on, please double-check that the filter is properly installed.

You see, if the filter isn’t seated correctly, lint can accumulate in its housing and trigger the lint light due to sensor misreads. Ensuring the filter fits snugly not only helps with accurate sensor readings but also ensures proper airflow.

So, please ensure you align the filter in the right direction and gently slide it into its housing. It shouldn’t feel loose or wobbly.

While you’re at it, it’s also important to inspect the lint filter for any visible signs of damage. If it’s broken or warped, please replace it with a new, compatible one.

Note: Cleaning the filter sensor with a microfiber cloth can also help solve the issue. If you suspect that the sensor is malfunctioning, call a professional. Testing and replacing the sensor can be a bit tricky.

Find any replacement part:

#2 Perform a Reset

If your dryer’s lint light won’t turn off even when the filter is clean, I recommend performing a reset.

Like computers or other electronic devices, dryers can encounter minor software issues that can lead to performance issues or error codes. Resetting your dryer can help clear temporary glitches and bugs causing the lint light to malfunction.

Follow these instructions to reset your dryer:

  1. Unplug your dryer from the power outlet. If you can’t reach the power cord, go to the circuit breaker box, search for the “Dryer” or “Laundry Room” breaker, and switch it off.
  2. Wait for a few minutes.
  3. Plug your dryer back into the power outlet or turn it on at the circuit breaker.

Once you’ve performed the reset, please check the lint light. Is it still turned on? Then, you’re probably dealing with an airflow issue. Read on to learn how to fix it.

#3 Inspect the Venting System

If the lint light isn’t affecting your dryer’s performance, you can consider ignoring it to avoid the hassle. However, if your clothes take longer to dry or you find yourself needing to run multiple cycles, the lint light likely indicates an airflow issue.

To check for airflow issues, my usual advice is to perform a paper test. To do so, simply open the door and hold down the door switch to trick your dryer into thinking the door is closed. Then, place a piece of paper near the vent or lint filter area and start a cycle. If the paper doesn’t get pulled towards the vent, there’s likely an obstruction.

Poor airflow can pose a fire risk due to lint buildup. Therefore, inspecting your dryer’s venting system immediately is crucial. Here’s how to do it:

  1. Unplug your dryer from its power source to prevent electrical hazards. Then, carefully move it away from the wall. If necessary, ask a friend for help.
  2. Disconnect the vent hose that is located on the back of your dryer. The hose is often held in place by clamps or screws.
  3. Clean the vent hose with a long brush to remove lint buildup and other obstructions. You can also use a vacuum cleaner attachment.
  4. Look for any visible signs of damage. You must get a replacement if the vent hose is kinked or damaged. Avoid purchasing a plastic or foil vent hose.
  5. Check the external vent. Make sure it’s not obstructed by nests or lint buildup. Consider using your vacuum again to clear out any lint or debris.
  6. Reattach the ducts and vent cover. Then, plug your dryer back into the power outlet and check if the lint light is still turned on.
Dryer duct
If your dryer’s lint light won’t turn off, you should clean and inspect the venting system.

If you’re uncomfortable cleaning or inspecting the venting system, please call a professional. They’ll be able to diagnose and fix the airflow issue safely.

#4 Test the Thermistor

In my experience, a faulty thermistor can also cause the lint light to stay on.

The thermistor is responsible for monitoring the internal temperature and sending signals to the control board, allowing it to activate the heating element as needed.

However, if the thermistor malfunctions, it can lead to inaccurate temperature readings and overheating issues. As a result, the control board can mistakenly interpret the readings as a reduction in airflow, causing the lint light to turn on.

To rule out the thermistor as our possible culprit, you’ll need to test it with a multimeter. Here’s how to do it.

  1. Unplug your dryer from its power source and locate the thermistor, which is typically on the blower housing. Keep in mind that the exact location will vary depending on your dryer’s model, so please refer to the manufacturer’s manual.
  2. Carefully disconnect the wires connected to the thermistor.
  3. Remove the thermistor from the dryer and turn your multimeter to the ohm setting.
  4. Place one of each of the multimeter’s probes on each of the thermistor’s terminals.
  5. Compare the displayed reading with the manufacturer’s recommended values (often found in the owner’s manual). If the thermistor is faulty, you’ll need to replace it with a new one.

#5 Check the Control Board

If you’ve tried all the fixes mentioned above, but your dryer’s lint light still refuses to turn off, there’s a good chance that the control board is malfunctioning.

Let me explain. The control board is essentially the brain of your dryer. It interprets signals from sensors like the thermistor and controls various components. Unfortunately, if the control board is faulty, it can misinterpret the sensor signals and affect different functions, including the lint light.

Replacing the control board can be both costly and challenging. So, if your dryer’s lint light is the only issue, and everything seems to be working fine, it’s probably best to skip the hassle.

However, if the control board is causing other performance issues, you should check your warranty status. If your dryer is no longer under warranty and is over 13 years old, replacing the entire unit is more cost-effective.

Wrapping Up: Fixing Your Dryer’s Lint Light

Hopefully, now you know how to fix your dryer’s lint light.

Remember that if the lint light won’t turn off, you’ll need to deep clean the filter and ensure it’s properly installed. It’s also important to perform a reset to clear any temporary glitches.

If the issue persists, don’t forget to check for airflow issues, inspect the venting system, test the thermistor, and examine the control board.

Thank you so much for taking the time to read this article. If you’ve found it helpful, please check out our other related articles below.

Have a great rest of the day!

I've been helping homeowners with appliance repair since 2016. Starting out as an enthusiastic amateur, I've since worked with many Appliance, HVAC, and DIY experts over the last 7+ years. My mission is to help fix your appliances and prevent future issues - saving you stress, time, and money. Visit my author page to learn more! Read more