On the covered LG dryer platform, HS means the dryer has detected an error with the humidity sensor — LG's own wording. LG notes HS makes the dryer run for two and a half hours, which can look like a failure to dry. First, clean the sensors inside the dryer, located below the lint filter.
Differential
Likely causes of “LG dryer code HS”, and how to tell them apart
- 1
The dryer has detected an error with the humidity sensor (HS)
What separates it HS shows and the dryer runs for a long time without drying
How to confirm Clean the sensors inside the dryer, located below the lint filter
- 2
Residue on the sensor bars
What separates it Fabric softener sheets leave a film on the metal sensor bars
How to confirm Wipe the bars with a damp cloth and a little rubbing alcohol
- 3
Wet sensors from a recent cleaning
What separates it The sensors were cleaned and are still damp
How to confirm Let the sensors dry fully before running another cycle
- 4
Wiring to the sensor loose
What separates it The code appeared after the dryer was moved
How to confirm A technician checks the wiring
- 5
A failed sensor or control board
What separates it The sensors are clean and dry and the code stays
How to confirm A technician replaces the part
Before you touch a setting
Record this first — changing settings destroys the evidence
- That the display shows HS
- How long the dryer runs, since LG notes that HS makes it run for two and a half hours
- Whether fabric softener sheets are used
- The model number
Try in this order
0 of 11 completedWhat to do first
ReversibleClean the sensors inside the dryer, located below the lint filter.
Correct only the documented fault domain
ReversibleLet the sensors dry fully before running another cycle.
Read the effect
ReversibleLG says HS indicates an error with the humidity sensor and makes the dryer run for 2 1/2 hours, which may seem as though the dryer is not drying.
Clean the sensors
ReversibleClean the sensors on the inside of the dryer, located below the lint filter.
Let them dry
ReversibleAllow the sensors to dry fully before attempting another cycle.
Unplug the dryer
ReversibleDisconnect power before you reach inside the drum.
Find the sensors below the lint filter
ReversibleLG's step is to clean the sensors inside the dryer, which are two metal bars located below the lint filter.
Wipe the bars
ReversibleUse a soft cloth with a little water or rubbing alcohol to remove the film that fabric softener and detergent leave.
Let the sensors dry fully
ReversibleLG says to let the sensors dry fully before running another cycle, because a wet sensor reads wrongly.
Run a short cycle
ReversiblePlug the dryer in and run a timed cycle to check that it dries and that HS does not return.
Avoid film in future
ReversibleUse fewer dryer sheets or wool balls, and clean the sensor bars every few months.
Model-specific
What is true of this model and not of its siblings
- The code on this page
- HS, a humidity sensor error.
- Parts involved
- The sensor bars, the wiring and the control board.
- LG's guidance
- Clean the sensors below the lint filter and let them dry fully.
Stop boundary
When this stops being a self-service repair
- !Unplug the dryer before you clean the sensors
- !Request service if HS persists after cleaning, with the full model number and exact code ready
- !If HS returns after the sensors are cleaned and dry, arrange LG service
- !Unplug the dryer before reaching inside
- !Do not use harsh abrasives on the sensor bars
Evidence ledger
Sources behind this answer
Where the manufacturer's article stops. The 2 1/2 hour run time is LG's own.
Exact questions
Common questions
What does HS mean on a LG dryer?+
the dryer has detected an error with the humidity sensor — LG's own wording. LG notes HS makes the dryer run for two and a half hours, which can look like a failure to dry.
What does HS mean?+
The dryer detected an error with the humidity sensor.
Why does the dryer run so long?+
It runs for 2 1/2 hours when HS is displayed.
How do I clean the sensors?+
Wipe the sensors below the lint filter and let them dry.
Why do dryer sheets and softener matter here?+
They leave a thin coating on the metal sensor bars, and a coated bar reads the load as wetter or drier than it really is.
Do dryer sheets cause it?+
They can leave a film that coats the sensor, which is a common cause.
Is the sensor expensive to replace?+
The sensor is a modest part, though the repair is a technician's job.