I have a Samsung DV431AGP. It runs fine but doesn't stop, always a lot of time remaining and clothes are dry. Even on the timed cycle it keeps running after the clothes are dry and the time remaining is whatever you originally set it for.

If you don't have clothes in it, the units moisture sensors will automatically end the cycle if you're on anything other than timed dry.

the cause of this is a bad timer switch it is the switch directly under the knob you turn to set the time on the dryer.You can purchase a new one on amazon or buy one from tribbles in timonium.

More than likely the temperature sensor has gone bad. If the unit is under warranty I would contact the dealer...otherwise you need to replace the sensor.

Hello,

If the clothing comes out dry within a normal time,usually 40 minutes or less. Whats happening is the computer is recatulacting the time remaining to dry a load of clothes as it senses they may still not completly dry or even will drop off some time if clotes are dry before time computer calculated at start of cycle.

Gene

How long is the vent from the dryer to the outside? Dryer vents that are longer than 8 feet with more than (2) 90 degree turns--can affect drying performance.
Setting the DRY LEVEL selector to *Very Dry* will solve most dry-ability issues. In homes with abnormally long vents--even the longer run time in the *Very Dry* setting is usually not sufficient to dry laundry loads.
Reducing the length of the vent or starting a second cycle becomes necessary to fully dry the clothing.
If a second cycle was started---only the amount of time that is needed to dry laundry will be used before dropping to 6 minutes and then the cycle will end with dry laundry.


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You can make adjustments to your Automatic Cycles by adjusting the Factory Dryness Level:
Changing the Automatic Cycle settings to increase or decrease drying time:
If all your loads on all Automatic Cycles are consistently less dry or more dry than you would like, you may change the default settings to increase or decrease the default dryness
level.

Your automatic drying settings can be adjusted to adapt to different installations, environmental conditions, or personal preference. This change is retained and will affect all of your
Automatic Cycles, not just the current cycle/load. There are 5 drying settings, which are displayed using the time display:
0 Much wetter clothes, 30% less drying time.
1 Slightly wetter clothes, 15% less drying time.
2 Factory preset dryness level.
3 Slightly drier clothes, 15% more drying time.
4 Much drier clothes, 30% more drying time.
TO CHANGE THE DRYING SETTINGS: NOTE: The settings cannot be changed while the dryer is running or paused. The dryer must be in standby mode (power is off) to adjust the default settings.

1. Before starting a cycle, touch and hold DRYNESS for 6 seconds.
2. Touch DRYNESS to select the dryness level shown in the time display: 0, 1, 2, 3, or 4.
3. Touch START/PAUSE to save the new dryness level setting.

Clean the lint filter(s) and verify unobstructed dryer exhaust. 99% of the time the dryer exhaust is clogged.

try timed dry cycle instead of the auto-sensing setting. In your drum if you have auto dry such as less dry normal dry and more dry, There is a sensor sometimes in the drum and sometimes in the exhaust right after the blower. If in the drum then your clothes brush by this and if moisture is sensed then it keeps on drying. With your rack the clothes can't touch the sensor so it tells your dial to turn and that items are dry which in fact are not. Try this and see how it does.

First try cleaning the moisture sensors with rubbing alcohol, these are two silver colored strips located inside the drier just below the lint cleanout