3 week old new Kenmore dryer The outside seems to get really hot when using even on 1st load is this normal

Hello,

No its abnormal the maximum operating temp is 155 degrees,the first thing to check is the vent for obstructions,espically outside since most houses have a covering over the vent that builds up with lint and blocks airflow, if the vent if fine ALL THE WAY from dryer to outdoors the thermister is defective

Your exhaust is plugged. Start your dryer go outside to the vent and feel for air coming out. If no air or just a little is coming out, check your exhaust tubing. Make sure you check the outside vent.

It normally takes about 45 minutes for a dryer to dry a full load. If your dryer is taking more than an hour, check these.
Frequently there's an obstruction in the vent duct from the dryer to the outside of the house. For the dryer to heat properly, the duct must be clean and clear of lint or any other substance.
Your dryer has some internal ductwork. If it gets clogged, your dryer can't dry properly. In most dryers, to get to the internal ductwork to clear the clog, you have to substantially disassemble the dryer. A quick way to check for internal clogs is to remove the lint filter and use a flashlight to inspect the inside of the duct. If it looks clogged and you can't clear it using your vacuum, contact a qualified appliance repair technician.
our dryer's heating element may be partially burned out. If it is, your dryer still heats, but at such a low temperature that it takes three or four times as long to dry the clothes. If the element is partially burned out, replace it.

Most dryers have a thermal fuse, which burns out when the dryer overheats, in which case the dryer will either not run at all or stop heating. The fuse is usually located on the vent duct, inside the dryer. A blown fuse will show no continuity when measured with a meter. Before replacing the fuse, make sure the blower wheel is not broken or clogged, and there is nothing blocking the venting.

Clear obstruction to hose outlet.
Vitally

Check your heating elements. check the outside exhaust door is it open.

repl/ hi limit and safety thermostat,, will solve prblems

Most common cause of this is a clogged venting going to the outside to test this remove the vent from the back of the dryer and run a load if it drys ok them you know you have a venting issue and will need to be cleaned out if not plz repost and we can look deeper into it

be sure vent to outside is not plugged or partially block be sure vet tube in back is not compressed flat or folded basically be sure you have good air flow to outside to take the moisture to the outside away from the clothes

Probably too late to help either of you since this is so old but there are two possibilities (assuming everything else works as normal).

1st
If you really mean the circuit breaker to your house, then the heating element is bad and pulling too many amps. It may be shorting out when it gets hot due to the expansion of metal.

2nd
If you mean a switch on (or in) the dryer then you mean a thermal breaker (or thermal fuse). The most likely problem is that the exhaust vent for the dryer is plugged up with lint either within the dryer itself or in the part that is in your wall and exits someplace outside (could be as far as the roof). When the hot air can't escape the dryer overheats and shuts off to prevent a fire.