Model:dnsr473 or dpsr473 The heat kicks in for about 1 min. Then it kicks out so why is this happening?The dryer is about 11yrs old

Typically - when this happens - the gas valve solenoid is failed, and needs replacement.

The flame sensor (thermocouple) may also be the culprit if it is failed - it will not tell the valve there is a flame present.

Check those out.

Thanks!

if the heat is on when the dryer is cold then shuts down after 15 to 30 minutes and doesn't lite for a long while you have bad gas coils,the gas should come on until it hits temp. then it shuts down,when the dryer calls for heat it will turn back on,if it stays on for short periods of time you might need to clean out the dryer,this will shut the gas down to soon,you need to clean out the duct that the lint filter slides into,blow out the vent line,make sure the air is blowing outside with nothing blocking it and vac out the inside of dryer where the motor is

Well, obviously your furnace is overloading the breaker it is on. Try this, turn off the breaker that the furnace is on and go through your house to make sure everything else still works. Furnaces are large power users and should preferably be on their own breaker/breakers. If everything still works then have someone you trust check the connections at your breaker box. I have had the same issue where after approximately a half hour or so my furnace would kick off.
Upon further inspection of the breaker noticed a loose connection that apparently was causing an arc and tripping the breaker. After it was tightened down I stopped having the problem period.

it sounds like the back bearing or the iderly pully does it do it with a load and with out or it could be the the front pads i wish you luck if you give me the model number i might be able to send you the break dowmn of your dryer
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rate this advise thank you

Get a new timer. It is not that expensive and the wiring is fairly simple.

My twin stacking whirlpool washer/dry. The timer switch kicks on but does not dry clothes kicks off after 5 mins but, clothes still wet.

if the motor buzzes when you push start then it is a bad motor.as long as the drum turns freely by hand.

sound like a motor problem it does not have a resetable limit if it was over heating then it would blow the limit and it would not heat, or the blower limit if it sences overheating would not allow the machine to run at all
get ready for a new motor, or a new dryer
200 plus to replace the motor

could be a bad motor or timer contacts. can you hear a humming sound coming from the motor if you tried starting it again? if there is none, wait for about 5 mins and try starting it again, hear what happens?..

you can check where the cord is connected to the drier did you use the cord off your old drier see if the cord is tight at the back of the drier and the center terminal of the cord should be on the center of the terminal block and why did you buy a new drier hold my rating till were done please