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LG·dryerhigh severity
LG Error Code d90
90% exhaust restriction
Common Causes
- 1Severely clogged vent
A 90% blocked vent represents an imminent fire hazard. Do not continue operating the dryer until the vent system is fully cleared and airflow is confirmed.
Step-by-Step Troubleshooting
- 1
Stop using the dryer immediately until the vent is cleaned — 90% restriction is a serious fire risk
- 2
Disconnect the dryer and pull it away from the wall to access the full exhaust duct
- 3
Use a professional-grade vent brush or hire a vent cleaning service — at 90% blockage, a standard brush kit may not reach the obstruction
- 4
Inspect the entire duct run for crushed sections, improper transitions (duct tape instead of clamps), or excessive length (LG recommends max 35 feet equivalent with deductions for elbows)
- 5
After cleaning, verify airflow by holding a tissue at the dryer exhaust outlet — it should be pulled firmly against the vent opening
Pro Diagnostic Tip
At d90 level, the dryer thermal fuse may be close to its trip point. If the dryer stops heating shortly after the d90 code first appeared, check the thermal fuse continuity — once tripped, it must be replaced (non-resettable).
You Might Also Notice
- •Dryer shutting off prematurely
- •Extremely hot dryer exterior
- •Burning smell from dryer
- •Clothes still damp after full cycle
Parts, Cost & Difficulty
Repair Difficulty
Easy — DIY FriendlyEstimated Repair Cost
$100–$200
Parts + labor. Free diagnosis with repair.
Do You Have the Right Tools?
Gas leak detector ($130), thermal fuse tester ($95), belt tension gauge, and vent inspection camera ($180). Our technician arrives with $15K+ in professional tools — your diagnostic is free.
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What This Repair Involves
Here's what a professional technician does to resolve this issue:
Thoroughly clean entire vent system
This repair requires gas leak detectors, thermal fuse testers, and high-voltage multimeters. Most homeowners find it safer and more cost-effective to have a licensed technician handle it.
Safety First — Know the Risks
Gas dryers carry carbon monoxide and explosion risk. Even electric dryers involve 240V circuits that can deliver a fatal shock. Our techs are licensed and insured — let them handle the risk.
Licensed & Insured · 90-Day Warranty · Same-Day Service
Get Professional Help Now
Error code d90 is a high-severity issue that can cause further damage to your dryer if left unresolved. A licensed technician can diagnose and fix it the same day.
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Frequently Asked Questions
What does LG error code d90 mean?
LG error code d90 indicates: 90% exhaust restriction. This is a high-severity issue affecting your dryer.
How do I fix LG error code d90?
Stop using the dryer immediately until the vent is cleaned — 90% restriction is a serious fire risk Then, Disconnect the dryer and pull it away from the wall to access the full exhaust duct Then, Use a professional-grade vent brush or hire a vent cleaning service — at 90% blockage, a standard brush kit may not reach the obstruction There are 2 more steps — see the full troubleshooting guide above. If these steps don't resolve the error, contact a professional.
How do I know if my dryer has error d90?
Besides the error code on the display, common signs include: Dryer shutting off prematurely; Extremely hot dryer exterior; Burning smell from dryer. If you notice any of these symptoms, check your dryer's display panel for error code d90.
How much does it cost to fix LG d90?
Repair costs for LG d90 typically range from $100 to $200 depending on the specific cause and parts needed. EasyBear offers free diagnosis when you proceed with the repair. Call (415) 795-7300 for a same-day appointment.