In short
A LG Signature whose cycle will not complete is either ending it deliberately or protecting itself. The ranking below is ordered for this brand; note whether the machine is hot when it stops, because that single observation splits the list in two.
What you are seeing
- It stops part way and will not restart until it cools — Thermal protection has operated, which means the air path is restricted.
- The cycle ends early with the load still damp — The machine believes the load is dry — a sensor reading rather than a failure.
- NEAR MISS — it runs the full cycle and the clothes are still wet — Then nothing is stopping the cycle; the heating page covers a dryer that runs without drying.
The ranking that matters
- Restricted airflow tripping the thermal protection — A blinded lint filter, a packed duct or a hood flap stuck shut makes the air in the drum too hot. The thermostat cuts the heat, the cutout stops the machine, and the cycle ends part way through with a hot machine and a damp load. First on this brand: the filter and the duct on this machine have never been cleared, and a restricted dryer trips its own protection before it does anything else. LG Signature is the built-in end of the LG range: the same platform lineage, but installed into cabinetry, which changes what can go wrong and what it takes to get at it.
- The moisture sensor or the programme chosen — An automatic cycle ends when the sensor says the load is dry. Strips coated with fabric-softener residue read dry far too early, and a low-heat or delicate programme was never going to finish a heavy load in one run. Next in order: one timed cycle eliminates it without a tool being used.
- The door switch — The door switch tells the machine the door is closed. One that is worn or marginal cuts out whenever the machine vibrates or the door is knocked, and the cycle stops instantly rather than winding down. After those two: it is quick to test by pressing the door while the machine runs.
- The load and the run of cycles before it — A packed drum blocks its own airflow and runs hotter. A machine used cycle after cycle without a pause builds heat in the cabinet until the protection operates. Both produce a cut-out with nothing at all wrong with the machine. Fourth in order: it contributes rather than causes, but it decides how often the fault shows.
The order to check in
- Feel the machine when it stops: hot or merely warm? — A machine too hot to rest a hand on has cut out on temperature, which makes this an airflow fault rather than a control fault.
- Run a timed cycle instead of an automatic one — A load that dries properly on a timed cycle, but not on an automatic one, has named the sensor for you.
- Press the door firmly while the machine is running — A machine that stops when the door is pressed, or that only runs when it is held, has a switch that is on its way out.
Steps you can take safely
- Wash the lint filter, vacuum its housing and clear the duct — Pull the machine out and take the duct off. Replace crushed flexible hose rather than straightening it.
Tools: vacuum, duct brushAbout 45 min
- Wipe the sensor strips inside the drum and run a timed cycle — The strips sit just inside the door opening. A little vinegar on a cloth removes the residue that upsets them.
Tools: clothAbout 20 min
- Dry a half load from cold with the filter clean — Leave the machine to cool for an hour first, and check the washer spun the load properly before it went in.
About 60 min
- STOP before removing a panel to test a thermostat or a fuse — Live terminals sit behind it and, on a gas machine, a gas train. Naming the likely cause is the useful end of an owner check.
The part that is not optional
Safety
Unplug the dryer or switch off its breaker before removing any panel — a capacitor can hold a charge after the power is off. On a gas dryer: if you smell gas, do not switch anything on or off, leave the building, and call the gas utility or 911 from outside; do not look for the leak yourself. Never run a dryer with its vent disconnected into the room.
The line between a fix and a call
The owner's part covers the filter, the duct, the sensor and the load. A thermostat, a thermal fuse or a control board is a service call — and a machine that keeps cutting out is warning you about its airflow, not about its protection.
Nearby pages
The limits of this page
Generalized information. Written for LG Signature dryers as a class rather than one family or model line; where a family-specific page exists it is the better answer and is linked above. Not covered here: thermostat part numbers, gas-train procedures and figures that vary between families.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
