Dryer heats but after 10 minutes is cold

DRYER OVERHEATING:

Heating Element
A defective heating element can make a dryer too hot. If the element partially shorts out, it can produce heat all the time, regardless of whether the dryer is calling for heat. Remove the heating element to inspect it. The coils should not be touching each other or anything else.

Other Causes and Conditions
Air Flow Problem
Dryers need good ventilation to work properly. If the vent is clogged it can make the dryer too hot. Clean all of the vent tubing thoroughly.

Cycling Thermostat
Although not common, a defective cycling thermostat can make the dryer too hot. The cycling thermostat is supposed to turn on and off the heat to maintain the proper temperature. If the thermostat is defective it may keep the heat on too long. The thermostat is not adjustable or repairable, it must be replaced.

Felt Seal
Most dryers have a felt seal at the front and rear of the drum to keep the heat inside the drum. If the felt seal is worn away or missing, the dryer may keep heating and make the dryer too hot. This is not common.

Blower Wheel
A defective blower wheel will not spin properly and will not vent the hot air, making the dryer too hot. Check to see if there is adequate airflow out of the dryer.
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GOD IS still GOOD !!!!

ARE U GETTING THE RIGHT AMOUNT OF VOLTAGE AT THE CONNECTION,? i VE SEEN IN SOME CASES WHERE THE MACHINE ONLY GETTING 120 AND WILL RUN BUT NOT CREATE MUCH HEAT? THE DRYER USES 120 TO RUN THE CYCLE BUT NEEDS A FULL 220 FOR THE HEAT CYCLE TO WORK, THUS IF UR MISSING VOLTAGE IT WILL NOT HEAT? ANOTHER CULPRIT COULD BE A BAD TIMER STUCK ON COOL DOWN OR FLUFF CYCLE AND WILL PRODUCE NO HEAT?

What is the model number of your unit?

you have a weak or failing thermostat ,, you can check them by doing this Set your multimeter to the R X 1 setting. Take each of your meter's probes and touch one to each terminal. You are testing for continuity, and you should receive a reading of either zero or infinity. At room temperature, testing the thermostat should produce a reading of zero. But if a thermostat is tested when it is heated to its limit, a reading of infinity should be produced. be sure machine is unplugged before doing any electrical tests

One thing you might check is to make sure there is not cold air blowing across the thermostat from one of the vents. I've seen this many times make the thermostat short cycle.

Some less expensive thermostats may be programmed to short cycle. If you have instructions available for the thermostat, try to find information or the "heat anticipator". It may have an adjustable setting.

Sounds like the dryer is overheating. One of 2 possibilities. The dryer vent hose is blocked or partial blocked allowing for heat build up. The other option is that the Thermostat has gome bad or is mal-funtioning. The thermostat works just like the heat in your house it maintains the temperature called for. In the case High heat meduim heat etc, based on the dial postion or cycle you choose

The problem is either of the cycling thermostat, high-limit thermostat or the gas valve solenoid coils sitting on top of the gas valve assembly. Disconnect power then verify any of these condition by bypassing the thermostats. Refer to the image below and locate the thermostats.

Note: This is an image of an electric dryer but the thermostat and the thermal cut-off (cut-out) locations are the same.

Disconnect each of the thermostat wires then connect and insulate them properly. Once done, reconnect power and start the dryer. The gas valve solenoid coils are indeed faulty and both need to be replaced if the problem still persists. Click here for the procedure in replacing the solenoid coils.

Gas Valve Solenoid Coils Replacement Procedure

Either or both of the cycling thermostat and the high-limit thermostat are malfunctioning if the dryer continues to heat up with the thermostats bypassed. Disconnect power then reconnect the cycling thermostat wires but keeping the high-limit thermostat bypassed. Reconnect power then start the dryer. The high-limit thermostat is the culprit if the dryer continues to heat up. If not, then the cycling thermostat is the culprit.

Also do the other way; that is reconnecting the high-limit thermostat wires but keeping the cycling thermostat bypassed. The cycling thermostat is the culprit if the dryer continues to heat up. If not, then the high-limit thermostat is the culprit.

Replace the faulty thermostat and it should solve the problem.

The thermostat that controls the heat has failed. Try one of the other settings on the timer switch ans see if it will heat, the different cycles use different thermostats.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/craig_3fa289bf857b1a3c

there are different temp setting Thermostat ,check to make sure the right one was installed. recheck element continuity

sounds like you are replacing the hi limit thermostat try replacing it with the cycling thermostat as well