The short answer
Start with a restricted vent: on House Kobo dryers it outranks cycling thermostats and thermal cutouts, and both come a long way before too much in the drum. On a compact import-channel unit the surroundings come first. There is very little mass and very little margin in these machines, so where one stands changes how it behaves. Most of what follows is owner-checkable, and the point where that stops is stated plainly below.
What you observe
- Timed cycles work but automatic ones do not — That separates the heating system, which is fine, from the sensing system, which is not.
- It runs the full cycle and the clothes are still damp — Either there is no heat, or the heat has nowhere to go and the moisture stays in the drum.
- An automatic cycle ends almost immediately — The moisture sensor believes the load is already dry, which it will do if the bars are coated.
- NEAR MISS — it makes a new noise but dries fine — Noise with normal drying is a mechanical fault, and the noise page for this appliance is the better read.
Causes, most likely first on House Kobo
- A restricted vent — Everything a dryer does depends on moving air through the drum and out of the building. A vent packed with lint, crushed behind the machine, or too long with too many bends will make a dryer overheat, cut out and dry badly — in that order, over months. Top of the list for this brand: it leads because a slow decline in drying followed by cut-outs is the vent story in full, and nothing else produces it.
- Cycling thermostats and thermal cutouts — A dryer has several thermal devices: one that cycles the heat on and off in normal use, and one or more that cut out completely if things get too hot. Second here, and this rank is deliberate: replacing a thermostat while the vent is still blocked fixes nothing for long.
- The moisture sensor bars — Automatic cycles decide when to stop by measuring the load across two metal bars inside the drum. Third: it belongs here because it is free to fix and because it explains the short-cycle cases specifically.
- Too much in the drum — A dryer works by tumbling clothes through moving air. Last, and the placement is the point: it ranks where it does because a single half-load test settles it, and because the machine is not at fault when it is the answer.
Check in this order, and why
- First: Disconnect the vent and run a short cycle — A machine that suddenly behaves with the vent off the back has named the vent and nothing else. It is first because it is the cheapest of the three to settle.
- Second: Is the cabinet unusually hot? — Heat in the cabinet and the door with a clear filter points at the air path beyond the machine.
- Third: Compare a timed cycle with an automatic one — A timed cycle that dries normally while the automatic one quits early puts the fault in the sensing.
What an owner can safely check
- Clear the lint filter and the vent run — Pull the machine out, take the hose off, clear it end to end, and check the outside flap opens freely.
Tools: vacuum, screwdriverAbout 40 min
- Clean the sensor bars inside the drum — Find the two metal strips inside the drum opening and wipe them with rubbing alcohol on a cloth.
Tools: rubbing alcohol, clothAbout 10 min
- STOP HERE if the next step needs a meter on live terminals — That is the line between an owner check and a service call, and it is not worth crossing.
Before you open anything
Safety
Unplug the appliance or switch off its breaker before removing any panel, and treat every capacitor as still charged: a capacitor can hold a charge after the power is off. Let the machine cool before reaching into the cabinet — the heater housing and the duct hold heat long after a cycle ends — and never leave a dryer running with its vent disconnected.
When to call a technician
The owner side of this list ends where the panels begin. Call if the machine cuts out with a clear vent and a clean filter, and call sooner if a load has ever come out smelling hot: a thermal cutout that has already opened once is the machine warning you about the air path, and it is worth taking seriously.
Nearest pages of this class
What this page does not cover
This is generalized information for House Kobo dryers as a class, not for one family or one model. No family- or model-specific page for this brand and appliance is published here yet, so nothing narrower is linked; when one is, it becomes the more specific answer and this page will point to it. Deliberately absent: part numbers, wiring colours and the order the panels come off in — those belong with a named family.
