Bosch dryer keeps shutting off

GOD IS STILL GOOD !!!!

ELECTRIC Dryer no heat or little heat, or shuts down to fast:

Check your venting and lint basket. Check blower for lint build up and blower wheel obstruction., test by trying to turn the wheel manually by hand (should be easy) May have to remove cabinet or front/back plate to get to it)

Next check the heating element itself with a meter for continuity OHMS CLOSED CIRCUIT. If not its defective or has a short if its grounding out? Which in turns causes blown fuses or thermostats or overheating.

Check dryer Terminal block prongs both outside prongs should give combined 220, and 110 each if u check 1 outside & 1 center (ground) prong. Also check house electrical outlet for full voltage. 220 because if u only get half or 110 volts you will be able to run the machine which uses only 110 to run motor but not the heater which uses a full 220,

Check the thermal cut off, the cycling and the hi limit thermostats.
For continuity or OHMS. If no ohms or resistance they need replacement.

In some dryer's the control panel relies on a thermistor rather than a CYCLING thermostat to regulate the drum's air temperature by monitoring the component's resistance changes; resistance goes down as temperature increases and up when temperature decreases. Once the drum's air temperature reaches a certain level required to dry clothes, the control panel shuts off the heater. The panel will turn the heater on again and begin another heating cycle when the thermistor indicates that more heat is needed to keep the air temperature constant inside the drum

Lastly check your moister sensor. ( located inside the dryer door usually) Especially if machine seems to shut down early and clothes are still wet.
Test with a meter at room temperature and it should show continuity.
A failed moisture sensor will affect the dryer run time in the automatic moisture sensing cycle but it will not affect the heating of the dryer or the timed cycle. Which are reflected by the thermostats.

Read more :http://www.ehow.com/info_12203962_check-dryer-thermistor.html

-Sounds like the timer motor is not working .
-Check and replace it.

Good Luck

Mai

Normal 0 MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman";} Hi,

If your dryer is not drying like it once did or if you just have not taken the time to give yourself a clean dryer in a long time then you need to do that. At least once a year the dryer cleaning should take place. Lint build up in the dryer duct is one of the main causes for your dryer to fail.

Here is the rest of this tip about Dryer Maintenance

heatman101

Clean out the entire exhaust venting system. If a build up of lint is inside of it the moister sensor shuts down the heating process causing the time to take to dry clothes seem forever

Many of your better dryers have an anti-wrinkle function. When a load is complete if you don't take care of it, every little while the dryer will turn on for a few minutes to fluff the clothes and beep to remind you.

if your thermal fuse is blown you will not recieve heat. if you put your dryer on sense load it will keep running because it is not sensing that the clothes are getting dry which in return your timer does not
advance

It sounds as if the wash cycle isn't terminated by pumping the rinse water out and spinning to rid the clothing of most of the water.
Most dryers sense moisture but I think they all will have a maximum run-time to prevent possible fires if the programmer fails to shut them down at the end of the drying cycle.
I would watch the machine and when it started the drying cycle, I would shut it off and check for surplus water that hadn't been pumped out as it should have been. 

The more dry less dry settings are basically how much heat you want to use. This is the sensor drying. There is a moister sensor in the dryer that senses the moister on the clothing. When it senses no more moister it will shut off and tell you your clothes are done. The trick with this is that you want to make sure you don't mix your heavy clothing with your light stuff. A t-shirt will dry much faster then jeans and it will sense that the shirt is dry and shut off. I put mine on about the second or third line on the more dry setting and my clothes come out fine. If you are mixing your clothing just put it around the third line. It all really depends on what is being dried. If it's heavy set it for more, if it's socks and such set it lower. Let me know if you have any other questions and let me know if this was helpful for you. Good luck.

Most likely the heating element or a thermostat.