I have a whirlpool gas dryer GGW9200LW1. starts to heat then qiuits. i have remove lent and blew out exhaust. thought it was fixed. starts to heat and then cools off.

If you disassemble the dryer, you probably will find the exhaust blower is clogged with lint (especially if you use softener). Also, the heating element(s) may have failed partially or a temperature sensor isn't working.

go to this site..
I think the first item is what is bad. here's where to start.
https://www.repairclinic.com/RepairHelp/How-To-Fix-A-Dryer/8-5-654402-/new/Whirlpool-Dryer-not-heating-LGQ8611PW2

thermal fuse more then likely blew:

http://www.davesrepair.com/DIYhelp/DIYthermalfuses.htm

Hi,

If you are having problems with your gas dryer not heating the most common problem is that the ignitor goes bad. Even though it glows sometimes it is still not working properly.

if you dryer is gas check out this gas no heat tip....

If you have an electric dryer, you can have many different things that can go wrong causing the dryer not to heat.

check out this electric no heat tip...

heatman101

Hi,

If you are having problems with your gas dryer not heating the most common problem is that the ignitor goes bad. Even though it glows sometimes it is still not working properly.

if you dryer is gas check out this gas no heat tip....

If you have an electric dryer, you can have many different things that can go wrong causing the dryer not to heat.

check out this electric no heat tip...

heatman101

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Hello, Unfortunatly your wrong on all 3 counts sorry :) This problem is going to be your safety valve coils...basically they get old and over time of heating then cooling develop a short when they heat up...It may appear the gas lights to start but then goes out until the safety valve coils cool back down. Here is a picture of the coils This The coils are mounted to the gas safty valve, This should solve your problem. Hope this helps, Please feel free to comment again if you have any further questions or concerns. Good Luck! Mike

there is a thermal fuse inside the dryer it is a one time fuse also there is an ignitor that could be bad

the motor is over heating cutting out on the thermal overload inside the motor replace the motor 279787 part number

either you are pushing the dryer back to far and crushing the exhaust vent hose .your exhaust vent going outside is stopped up , or your low temp thermo will not let the dryer cycle and it is over heating.