The short answer
A House Kobo dryer that runs but leaves clothes damp is far more often an airflow problem than a failed heater. The first thing to check: vent duct or lint filter restricted. Clear the lint path before anything is bought, because a restricted vent also destroys the parts that follow.
What you observe
- The drum turns but the air is cool — Heat production, not airflow, if the air is clearly moving.
- The cycle runs and runs and clothes stay damp — The classic restricted-vent presentation.
- NEAR MISS — the dryer does not run at all — A machine that does nothing is a different fault. Read the will-not-start page for this brand.
Causes, most likely first on a House Kobo dryer
- Vent duct or lint filter restricted — A dryer dries by carrying moisture out. Restrict that path and the machine heats, trips its limit, cools and heats again, so the clothes stay damp and the cycle runs for ever. This is the most common cause by a wide margin. On a compact import build this sits below the placement and door causes: it happens, but not before the cheaper ones have been ruled out.
- Thermal cut-off or high-limit device open — When a restricted vent overheats the machine, a one-shot safety device opens. The dryer then tumbles with no heat at all. It is a cheap part, but fitting one without clearing the vent simply repeats the fault. The service parts on this class are thin and cheap, which is exactly why they are the first thing to give and the easiest thing to put right.
- One part of the electrical supply missing — An electric dryer runs the drum on one part of the supply and the heater on another. Lose the heater part and the machine tumbles perfectly with no heat, which sends owners looking for a broken element that is fine. On a compact import build this sits below the placement and door causes: it happens, but not before the cheaper ones have been ruled out.
Check in this order, and why
- Check the lint filter, then the duct, then the flap outside — First every time: it is free, and it causes most of what follows on this list. It is first because it is the highest-ranked cause here.
- Note whether the heat stopped suddenly rather than fading — A sudden and total loss of heat is the signature of a one-shot device opening. Second: the next most likely, and free to rule out.
- Note whether the drum turns normally while producing no heat at all — Checked early because it is free and it explains a machine that otherwise behaves perfectly. Third, and only once the two above are clean.
What an owner can safely check
- Clean the lint filter and clear the duct all the way to the outside flap — Check the flap actually opens when the dryer runs. Crushed flexible duct behind the machine is the usual finding.
Tools: vacuum, flashlightAbout 45 min
- Run the machine and hold a hand at the outside vent flap — Strong warm air means the vent is clear and the heat is being made. Weak air names the duct immediately.
About 15 min
- STOP HERE if the next step needs a panel off or a meter on live terminals — Everything past this point belongs to a technician.
Before you open anything
Safety
Unplug the machine or switch off its breaker before removing any panel. A capacitor can hold a charge after the power is off. A dryer with a restricted vent is a fire risk: lint is fuel, and the machine is designed to move it outside rather than store it. Never run a dryer with the vent disconnected into the room, and never fit a replacement safety device without clearing what opened it. If 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 call a technician
Call when the vent is proven clear and the air still comes out cool, when heat stopped suddenly and completely, or when a gas dryer tumbles without the burner lighting. Call immediately if you smell burning or gas. Tell the technician how long the machine has been drying slowly, because a long history of slow drying points at a restriction that has already taken out one safety device and will take out its replacement unless the duct is cleared.
Nearest pages of this class
What this page does not cover
This page covers House Kobo dryers as a class, not one family or model line. Where a family- or model-specific page exists for your unit, that page is the more specific answer and the one to read first. Deliberately not here: wiring colours, torque figures, part numbers and service-manual sequences, which differ by family.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
