The short answer
A Costway compact dryer that tumbles without heat is usually being asked to work through a blocked lint filter or a restricted vent, or has been left on an air or cool setting. These machines have a small heater with very little margin, so any restriction shows up as no heat at all rather than as slightly less. Check the filter, the vent and the setting first.
What you are actually seeing
- The drum turns but the air is cool — Means: on-page
- An air-dry, cool or fluff setting is selected — Means: on-page
- Clothes come out warm but still damp — Means: on-page
- Heating stopped after the machine was moved — Means: on-page
- The machine gets hot on the outside but the load does not dry — Means: on-page
- The drum does not turn at all — Means: different-fault — Go to: costway-dryer-wont-start
- It heats but the load is still damp — Means: different-fault — Go to: costway-dryer-cleaning-performance
- Body: Match what you see before you take anything apart. The drum turns but the air is cool. An air-dry, cool or fluff setting is selected. Clothes come out warm but still damp. Heating stopped after the machine was moved. The machine gets hot on the outside but the load does not dry. Some near-miss symptoms belong on a different page: The drum does not turn at all points at a start or drive fault, covered on costway-dryer-wont-start; It heats but the load is still damp points at a drying performance problem, covered on costway-dryer-cleaning-performance.
Causes, ranked for this machine
- An air, cool or fluff setting selected instead of a heated cycle — Why this rank: First because it produces exactly this symptom on a perfectly healthy machine and costs nothing to rule out
- A blocked lint filter starving the heater of airflow — Why this rank: A small filter blocks in a single load, and every heated compact dryer depends on that airflow
- A restricted, crushed or over-long vent hose on a vented machine — Why this rank: The hose is short by design, and pushing the machine back against a wall crushes it
- A thermal cut-out that has opened because of a restriction, so the heater is off but the drum still turns — Why this rank: This is the machine protecting itself, and it explains heat that has stopped completely rather than reduced
- A failed heater or thermostat — Why this rank: Last because it needs a part and everything above it is free to rule out
- Body: Ranked for a compact or portable dryer on a household outlet: either a vented machine with a short flexible hose, or a ventless machine that collects condensate in a tank or sends it down a drain hose. Most likely: An air, cool or fluff setting selected instead of a heated cycle. First because it produces exactly this symptom on a perfectly healthy machine and costs nothing to rule out. Next most likely: A blocked lint filter starving the heater of airflow. A small filter blocks in a single load, and every heated compact dryer depends on that airflow. Third: A restricted, crushed or over-long vent hose on a vented machine. The hose is short by design, and pushing the machine back against a wall crushes it. Fourth: A thermal cut-out that has opened because of a restriction, so the heater is off but the drum still turns. This is the machine protecting itself, and it explains heat that has stopped completely rather than reduced. Fifth: A failed heater or thermostat. Last because it needs a part and everything above it is free to rule out.
What to check, in order
- Check the cycle selected is a heated one rather than air or fluff
- Clean the lint filter completely and run a short heated cycle
- Straighten and shorten the vent hose on a vented machine
- Feel the air at the vent outlet to establish whether the machine is heating at all
- Body: Each check rules out the causes above it. First, check the cycle selected is a heated one rather than air or fluff. Second, clean the lint filter completely and run a short heated cycle. Third, straighten and shorten the vent hose on a vented machine. Fourth, feel the air at the vent outlet to establish whether the machine is heating at all.
Checks you can safely make yourself
- Read the control and select a heated cycle explicitly rather than an air, cool or fluff setting — Tools: none — Time estimate: a few minutes
- Unplug the machine, remove the lint filter, clear it completely by hand and rinse it if it is felted with fine lint — Tools: brush, water — Time estimate: a quarter of an hour
- Pull the machine forward and straighten the vent hose, removing any crushed section and shortening any excess — Tools: torch — Time estimate: a quarter of an hour
- Run a short heated cycle and feel the air at the vent outlet or the exhaust: it should be warm and moving — Tools: none — Time estimate: a quarter of an hour
- Unplug the machine, leave it for a period and run it again, in case a thermal cut-out has opened on a restriction — Tools: none — Time estimate: half an hour
- Body: Checks an owner can make with the machine unplugged or by watching a short cycle. Step one: Read the control and select a heated cycle explicitly rather than an air, cool or fluff setting. Tools: none. Time: a few minutes. Step two: Unplug the machine, remove the lint filter, clear it completely by hand and rinse it if it is felted with fine lint. Tools: brush, water. Time: a quarter of an hour. Step three: Pull the machine forward and straighten the vent hose, removing any crushed section and shortening any excess. Tools: torch. Time: a quarter of an hour. Step four: Run a short heated cycle and feel the air at the vent outlet or the exhaust: it should be warm and moving. Tools: none. Time: a quarter of an hour. Step five: Unplug the machine, leave it for a period and run it again, in case a thermal cut-out has opened on a restriction. Tools: none. Time: half an hour.
Safety first
Safety
Unplug the machine before clearing a filter or a vent hose, and never run a heated dryer with the lint filter removed. A dryer with a blocked airflow path is a fire risk, so clear the restriction rather than working around it. Unplug the appliance or switch off its breaker before removing any panel. Unplug the appliance or switch off its breaker before removing any panel. A capacitor can hold a charge after the power is off. unplug-before-service
Where the owner fix ends
Call for a warranty claim or a technician when a heated cycle is selected, the filter is clear, the vent hose is short and straight and the machine still produces no warm air. That leaves the heater, the thermostat or a thermal cut-out that keeps opening, all inside the cabinet.
Nearest pages of the same kind
Generalized information
This page is generalized across the Costway compact dryer line. Vented compact tumble dryers, ventless condensing machines and spin extractors share the ranking above but almost none of their parts, and this page does not cover a specific model or control revision. Family- and model-specific pages, where they exist, are linked below.
Links: - [Common COSTWAY Dryer Problems](/blog/costway-dryer-problems) - [COSTWAY Dryer: Abnormal Noise or Vibration](/blog/costway-dryer-abnormal-noise) - [COSTWAY Dryer: Does Not Clean or Dry](/blog/costway-dryer-cleaning-performance) - [COSTWAY Dryer: Controls, Display or Error Code](/blog/costway-dryer-control-fault)
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
