The short answer
A Criterion dryer that ends its cycle with a damp load is usually misjudging dryness or short of airflow rather than short of heat. On this class the usual cause is a restricted vent making every cycle longer, with moisture sensor bars filmed with softener residue next to rule out, and both are owner checks.
What you actually observe
- Every cycle takes longer than it used to — A gradual change across all cycles is airflow.
- Timed cycles work and automatic ones do not — That contrast narrows the list to one component.
- NEAR MISS: the drum turns and nothing ever gets warm — That is a heating failure and it has its own page and cause list.
The causes, most likely first on this brand
- A restricted vent making every cycle longer — A dryer removes moisture by moving air, so a duct that is half blocked doubles the drying time long before it trips anything or fails outright. Ranked first on a Criterion unit: these machines ship with a short duct kit that is almost always extended badly on installation, which makes airflow the first suspect.
- Moisture sensor bars filmed with softener residue — An automatic cycle judges dryness through two metal strips in the drum, and a film of fabric softener on them makes the machine read a wet load as dry and stop early. Ranked second here: the sensing on this brand is simple and film on the strips throws it readily.
- A cycle or option that ends cooler and earlier than expected — Ranked third here: the panel puts anti-crease and low-heat options beside the normal ones and they are chosen by accident.
- A drum packed too full to tumble — Ranked fourth here: last, though a contract-built drum is smaller than it looks.
Check in this order, and why this order
- Feel the exhaust outside while the machine runs, and check the flap lifts firmly — Weak flow at the outside vent is the restriction you can find without a tool.
- Find the two metal strips inside the drum and run a finger across them — A dull or slightly sticky surface is the film, and it is invisible until you touch it.
- Look at which cycle and which options are actually selected — An option chosen once and never cleared explains months of poor results.
What an owner can safely check
- Clean the lint filter, then pull the duct off and clear the whole run to the outside — Lint in a duct is both the reason for the long cycle and a fire risk in its own right.
Tools: vacuum, screwdriverAbout 45 min
- Wipe the sensor strips with a cloth and a little white vinegar or rubbing alcohol — Then cut back on dryer sheets and liquid softener, because that is what put the film there.
Tools: cloth, white vinegarAbout 15 min
- STOP HERE if the next step needs a meter on live terminals or a panel off — That is where an owner check ends and a service call begins.
Before you open anything
Safety
Unplug the dryer or switch off its breaker before any panel comes off or a duct is disturbed. If you smell gas, do not switch anything on or off, leave the building, and call the gas utility or your emergency number from outside. Lint is the fuel in almost every dryer fire, so a restricted duct is urgent rather than an inconvenience, and a dryer must never be run with its vent discharging into the room.
When to call a technician
Call once the sensing, the duct, the load and the cycle are all clean and the results are still poor, because a thermistor or a control fault needs a meter and panels off. Call sooner if the cabinet is unusually hot or there is a smell of hot lint, since that is a fire risk rather than a performance problem. Bear in mind when you decide that this is a retailer house brand built by a contract manufacturer, so parts come through the retailer rather than from a brand service network.
Nearest pages of this class
What this page does not cover
This page covers the Criterion dryer as a class, not one family or model line. Sensor arrangements, cycle structures and duct specifications all change from build to build and are deliberately not here. Where a family or model page exists for your machine, it is the more specific answer and the one to read first.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
