Dryer shuts off prematurely

timed cycle mean dryer not on sensor dry mode. check wire connection on moisture sensor bars (i think you forget to put 2 wire connector put together). when you use other cycle dryer use moisture sensor to dry cloths so sensor not working dryer will stop in 5 minutes or so because dryer think there are no wet cloths to dry. hope this help you.

Hello. I don't know what make/model dryer you have but the problem could be with load size and type of clothing. The sensor bars are usually located on the front of the lint screen housing(you have to put your head in the dryer and look back to see them--they are 2 metal strips, approx 1/2" apart and at least several inches long). The damp/wet clothing keeps shorting across the strips, telling the main board to keep the dryer running. If there isn't enough of a load, the dryer may think that the clothes are dry prematurely and count down too quickly. The sensor bar technology *is not* an exact science--it works best on large loads with like clothing. For smaller loads, use time dry and adjust the temp setting accordingly. I hope I helped you.

it is a problem with how you are loading the unit. you must use the same type and weight of clothes or the sensor will think the light items are dry and then shut the unit off.
try to do a load of all towels and see what happens on the automatic cycle. if it does well then you just need to sort your clothes better.
the sensor is just 2 metal strips and will never fail.

find the metal sensors in the drum
scratchem up with sand paper

especially if you wash rugs, sneakers , or anything with acyrlic

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.

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

you have thermistor failure/ located inside machine reason for premature heat

it sounds like an airflow problem. check everywhere the air flows. inside the lint catch. the vent behind the dryer may be clogged or kinked. the exhaust line in the floor or wall of the house might be clogged.

It is the moisture sensor system, it is not sensing the wet clothes. Open the door, inside you should see a part with 2 metal bars that is around 3 inches long, clean these bars with a mult purpose cleaner. Sometimes fabric softner sheets and detergent builds up on this so that the machine cannot sense the moisture. Hope this helps.