The answer first
A dryer that will not dry has usually lost airflow rather than heat. On this machine the first suspect is lint filter blocked, or a film on the mesh.
What you observe
- Clothes are damp and hot at the end of a cycle — Heat is being made and not carried away: airflow.
- Clothes are cool and damp at the end — No heat at all, which is a different fault from the one above.
- The cycle takes two or three times as long as it used to — A gradual restriction rather than a sudden failure.
- NEAR MISS — it will not start at all — That is a start failure, and the wont-start page ranks its causes.
Causes, most likely first on a Smad dryer
- Lint filter blocked, or a film on the mesh — A filter that looks clean can carry an invisible film from fabric softener that halves the airflow. Ranked first on a Smad dryer: airflow is what dries clothes, and the filter is the first thing in its way.
- One leg of the electrical supply lost — A breaker tripped on one side only produces this exactly.
- Vent duct blocked, crushed or too long — This is both the commonest cause of poor drying and the fire risk in the appliance.
- Outside vent flap stuck, blocked or full of lint — The flap at the outside wall jams with lint, paint, ice or a bird's nest, which stops the air leaving.
Check in this order, and why
- Hold the filter under a running tap and see whether the water passes straight through — Clean it with warm soapy water and a soft brush.
- Switch the dryer breaker fully off and on, both halves together — A large appliance circuit is typically 30 A or higher at 240 V, and a double breaker can trip on one side.
- Disconnect the duct at the machine and run a short cycle — Good drying with the duct off proves the duct is the restriction.
What an owner can safely check
- Wash the lint filter in warm soapy water with a soft brush and rinse it until water runs straight through — A filter that holds water holds air too. Do this whenever softener sheets are used.
Tools: warm soapy water, soft brushAbout 15 min
- Push the dryer breaker fully to off and then back on, both halves together — A half-tripped breaker looks set and is not, and it gives a dryer that tumbles without ever heating.
Tools: torchAbout 10 min
- STOP HERE if the next step needs a panel off, a meter on live terminals, or the gas train — That is where the owner checks end; gas and high-current work are never owner work.
Before you open anything
Safety
Isolate the dryer at the breaker before a panel comes off and let any capacitor bleed down. Treat lint as fuel: the filter every load, the duct on a schedule, and never run the machine with the duct disconnected. On a gas dryer, a smell of gas means do not switch anything on or off, leave the building and call the gas utility or 911 from outside — never search for the leak yourself.
When to call a technician
Owner work is the whole lint path: filter, duct, flap and the load itself. Elements, igniters, gas valves, thermostats and thermal fuses are a technician's job. Stop using the machine if you smell scorching. If your unit is an absorption model running on gas, the gas side is not owner work: a licensed gas technician handles the burner, the flue and any smell of gas.
Nearest pages of this class
What this page does not cover
This page covers the Smad dryer as a class, not one family or model line. Where a family- or model-specific page exists for your unit it is linked above and it is the better answer — read it first. Deliberately not here: part numbers, wiring colours, panel removal order and torque figures, all of which differ between families under one nameplate.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
