The short answer
On a compact plug-in dryer, no heat is usually lost heat rather than a dead heater: a restricted vent, a tripped cut-out or a circuit that is sharing its load. Check the filter and vent before you suspect any part, because that is where this fault lives.
What you actually see and hear
- The drum turns and the cycle runs but the laundry stays damp — Air is moving and the motor is fine, so this is heat or airflow.
- The cabinet and door glass feel hot but the exhaust is barely warm — Heat is being made and not carried away - a classic restriction.
- It dried normally until recently and now takes two cycles — Gradual airflow loss, almost always lint in the hose or the outside flap.
- NEAR MISS - the drum does not turn at all — That is a start or motor fault and it belongs on the will-not-start page.
Causes, most likely first on this machine
- Restricted vent hose or blocked outside flap — First and by a wide margin on compact machines. The air path is short, so a small amount of lint is a large restriction, and the heat cannot leave the cabinet.
- Clogged lint filter — Second. It is checked every load in theory and almost never washed, and the invisible film from dryer sheets restricts air badly.
- A tripped thermal cut-out — Third, and it is the consequence of the first two: the machine protects its heater by cutting it out, so the drum turns cold.
- Shared or overloaded branch circuit — Fourth, and specific to plug-in machines. A standard household branch circuit is fifteen or twenty amps, and a dryer sharing it with a kettle or a heater will underperform or trip.
- Heating element or thermostat — Last. Elements do fail, but on this class they usually fail because airflow was lost first.
Check in this order, and why
- Clean the lint filter, wash it and dry it — The cheapest possible test of the top of the ranking.
- Run the machine with the vent hose detached — If it dries with the hose off, the hose or the outside flap is the fault and nothing inside the machine is wrong.
- Feel the exhaust air with the hose off — Warm air with the hose off and cold drying with it on is the diagnosis complete.
- Check what else is on the same outlet and circuit — Only worth doing once airflow is clean.
What an owner can safely check
- Wash the lint filter in warm water and dry it completely — Removes the invisible film that a shake will not.
Tools: warm waterAbout 10 min
- Detach the vent hose and run a short cycle with the exhaust open to the room — Do this briefly and with the room ventilated. It isolates the hose in minutes.
About 15 min
- Clean the hose along its whole length and clear the outside flap — Lint packs at bends and at the flap, which is the end nobody checks.
Tools: torch, brushAbout 30 min
- Plug the dryer into an outlet with nothing else on it — Separates a supply limitation from a machine fault.
About 10 min
- STOP HERE before testing the element, thermostats or thermal fuse — Those are live tests behind a panel and they are the last suspects, not the first.
Before you open anything
Safety
Unplug the appliance or switch off its breaker before removing any panel - a capacitor can hold a charge after the power is off. Lint is fuel, and a compact dryer that is running hot with restricted air is the exact condition a dryer fire needs. If the cabinet is hot enough to be uncomfortable, stop using the machine until the vent is clear. Never run it with the vent permanently disconnected indoors.
When to call a technician
Call when the vent is clear end to end, the filter is clean, the outlet is uncontended and the drum still tumbles cold - that leaves the element, a thermostat or a thermal fuse, all of which need a meter on live terminals. Call immediately if you smell scorching, if the cabinet is too hot to touch, or if the breaker trips when the heat should come on, because each of those is a fire or fault-to-ground risk rather than a drying complaint.
Nearest pages of this class
What this page does not cover
This page is written for the compact plug-in dryer class, not for one family or model line. Where a brand- or model-specific page exists for your unit it is the more specific answer and it is linked above, so go there first if your machine is named. What is deliberately not here: element ratings, thermostat cut-out values, vent length limits and wiring colours, all of which differ by family and belong on the page for that family.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
