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Short answer: run a timed cycle as a test. If that completes, the machine is fine and automatic sensing chosen where timed drying was needed is misreading the load on this dryer. If the timed cycle also cuts out, the fault is heat or airflow protection instead.
The symptoms, and the ones that mean something else
- A timed cycle works but an automatic one does not — The clearest possible result: the heat and the airflow are fine, and the sensing is not.
- Clothes come out with a stiff or waxy feel — Softener build-up, which is also what blinds the moisture sensors in the drum.
- The display counts down and then jumps to the end — Automatic cycles estimate the remaining time from the sensors, so a jump is the sensors changing their mind.
- NEAR MISS — the machine will not start at all — A dryer that never begins is a no-start fault, and a different page ranks the door switch, the supply and the belt.
What actually causes this, ranked
- Automatic sensing chosen where timed drying was needed — It belongs on the list because it is free, immediate, and because a change of habit fixes it permanently. Ranked ahead of the rest since it is both the likeliest and the only one that can be settled before anything is taken apart. Equipment specified for a working kitchen is cleaned, loaded and run to a schedule, and the ranking below follows what that schedule wears out.
- Mixed fabrics drying at different rates — It sits here because it costs nothing to test, because it explains the very common case of small loads working and large ones failing, and because no part will ever fix it. It follows the first because the two produce the same complaint, and this one is the cheaper of the pair to eliminate.
- Moisture sensor bars coated with softener film — The result is a machine that behaves perfectly and stops in minutes, because it has been given the wrong information rather than because anything has failed. This far down the list because it needs the two above ruled out before the evidence for it means anything.
- A duct blocked enough to trip the thermal protection — When the exhaust is restricted, heat builds in the cabinet until a thermal device opens and stops the cycle. The machine cools, the device resets, and the next load behaves the same way — a stop-start pattern that looks electronic but is entirely mechanical. Bottom of the order, because reaching it means the three likelier answers were already wrong.
The order that finds it fastest
- Run the same load on a standard timed cycle — If it dries, the machine is healthy and the cycle choice was the fault. Start here — it is free, and it decides which half of the list you are in.
- Look at how the load comes out: dry outside, soaked inside — That pattern is the definitive signature of a load that could not tumble. Second, and still no tools beyond a torch.
- Run a timed cycle and compare the result with an automatic one — A timed cycle that dries properly proves the machine is fine and the sensing is not. Third in sequence — useful, but rarely where the answer turns out to be.
What to do, step by step
- Select a standard or heavy cycle for the load and run it again — Change one setting at a time so the result actually tells you something.
About 20 min
- Split the load in half and run it again — The cheapest test on this page, and it is right more often than owners expect.
About 20 min
- Clean the sensor strips with a cloth and rubbing alcohol until the metal is bright — Do it with the power off, and do not use anything abrasive on the strips.
Tools: cloth, rubbing alcoholAbout 15 min
- STOP as soon as the fault is narrowed to a part rather than a condition — Naming the part is the useful outcome of an owner check. Fitting it is the other half, and it is not the same job.
Before you touch anything
Safety
Switch off at the breaker before working on the machine, and treat lint as what it is — fuel. A restricted duct and a hot cabinet are how dryer fires start, so clear the air path before you run it again. If it is a gas machine and you smell gas: do not switch anything on or off, leave the building, and call the gas utility or the emergency number from outside.
When to stop and call
This becomes a service call when the machine cuts out on every cycle with a clear vent, or when it gets very hot before stopping. Until then, the free checks above account for the large majority of these complaints.
Nearest pages of this class
Scope, and what is missing from it
Read this as the class-level answer. If a page exists for your particular Koolmore line, that page is more specific and more useful for your unit, and it carries the model detail this one cannot: fastener sizes, component positions and service sequences.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
