A dryer that runs a full cycle and leaves the clothes damp is a specific complaint with a short list of causes. Almost none of them require a technician, and the most common one is free to fix.
Work through it in order.
First, decide which problem you have
Two different faults look identical from the laundry basket and have completely different causes.
The drum is turning and there is no heat. Clothes come out cold and wet. This is a heating fault.
The drum is turning, there is heat, and things still are not dry. Clothes come out warm and damp, and the machine and the room feel hot. This is an airflow problem, not a heating one.
Reach into the drum ten minutes into a cycle. Warm means airflow. Cold means heat.
Most people assume heat and it is usually airflow.
If it is airflow, which it usually is
A dryer works by moving heated air through the load and carrying the moisture out. Block that path and the drum becomes a warm humid box. The clothes stay damp, the machine runs hotter to compensate, and everything takes twice as long.
The lint screen, every load. Everyone knows this and about half of people do it.
The lint screen itself. This is the one nobody knows. Fabric softener and dryer sheets leave an invisible film on the mesh that blocks air while the screen looks perfectly clean. Run water onto it. If the water beads or pools instead of falling straight through, it is coated. Wash it with warm soapy water and a soft brush, both sides, and dry it completely before it goes back.
The duct behind the machine. Pull the dryer out, disconnect the duct, and vacuum both directions. If the duct is plastic or foil accordion, replace it with rigid or semi-rigid metal. Accordion duct traps lint in every ridge and it is the single worst thing in most laundry rooms.
The exterior vent hood. Go outside while the dryer runs and feel it. You should feel strong warm air. Weak or no airflow means the run is blocked. Check the flap opens. Birds nest in these, and lint packs solid at the hood more often than anywhere else.
The length of the run. A long duct with several elbows chokes airflow permanently. If your dryer is on an interior wall with a long run, that is a design problem and a vent cleaning service is worth the cost once a year.
If it is genuinely not heating
Cold drum, no heat at all. Check these before calling anyone.
Electric dryers use two circuit breakers. If one trips, the drum still turns and the heating element gets nothing. This is extremely common and it looks like a dead heating element. Switch both breakers fully off, then back on.
Gas dryers: check the gas. If the supply valve is partly closed or the gas is off, the drum turns without heat.
Check the cycle you selected. Air fluff and air dry run with no heat by design. It sounds obvious and it accounts for a real share of these calls.
Past that, a failed thermal fuse, heating element, or igniter is the likely cause and those are genuine repairs. A thermal fuse is worth knowing about though, because it usually blows as a result of restricted airflow. Replacing the fuse without clearing the duct means it blows again.
The things that are not the machine
Three causes that get blamed on the dryer.
Overloading. Air has to move through the load. A packed drum stops that completely. Fill to about half. An underfilled dryer is genuinely faster than a full one and people consistently get this backwards.
The load arrived too wet. If the washer is not spinning properly, the dryer has far more water to remove and will look like it is failing. Run a spin-only cycle and see whether the load comes out noticeably drier.
Mixed load weights. Towels and jeans with shirts means the light items finish long before the heavy ones, and the machine keeps running for the towels. Sort by weight and both loads finish faster.
The Durham factor
Humidity matters here in a way it does not in a dry climate.
A dryer vents into the outside air, and in a Piedmont summer that air is already carrying a lot of moisture. The temperature difference doing the work is smaller, so cycles genuinely run longer in July than in January. That is not a fault.
What it means practically: a marginal duct that just about coped through the winter will start failing noticeably in summer. If your dryer got worse around May, the duct was probably already restricted and the humidity exposed it.
The other local point is that a lot of housing here has the laundry in an unconditioned garage or a closed closet. A dryer pulls its air from the room, and a sealed closet starves it. Leave the door open, or fit a vented door.
The safety part, which is not optional
Restricted dryer ducting is a documented cause of house fires. Lint is highly combustible, and a blocked duct means the machine runs hotter with dry fiber sitting in the hot path.
So a load that suddenly needs two cycles is not only an inconvenience, it is the signal to clear the duct. If you take one thing from this, take that.
While the machine is down
A dryer waiting on a vent service or a part can leave a household several loads behind, and wet laundry does not wait in this climate.
The machines at our self-service laundry on Guess Road are vented through short, straight, properly sized ducting maintained on a schedule, which is most of why a load finishes in one cycle here. The washers also extract far more water, so there is less for the dryer to remove in the first place.
Our machines and the store are cleaned daily, and lint screens are part of that, so you are not running through a coated screen someone else left.
Nou wash-dry-fold service covers everyday laundry until the repair is done.
The short version
Reach into the drum ten minutes in. Warm and damp means airflow, cold and wet means heat. Airflow is the usual answer: clean the screen every load, wash the screen itself with soap every few months because softener coats it invisibly, vacuum the duct, and check the exterior vent hood for strong airflow. On an electric dryer with no heat at all, one of its two breakers has probably tripped, which leaves the drum turning. Do not overload it, and do not replace a thermal fuse without clearing the duct first. A load that suddenly needs two cycles is a fire risk signal rather than an annoyance.
WaveMAX Durham is at 3222 Guess Road, easy to reach from Durham and the surrounding area. If your dryer has quit and the laundry cannot wait, call us at (919) 748-3180.