I would like to know if the roper dryers have a reset button only cool air will come out what could be the problem model #rex3514rqo

Tgail - NO RESET BUTTON :: To try to fuind your trouble do this :: #1 Check to make sure that you r double breaker is not tripped ( IF you have Screwin fuses there will be two fuses you will have to check .:: IF you are only getting 110 volts ,there are parts of it that will still work because that part works on 110volts, LIGHTS WILL WORK::THE TUB WILL SPIN <ECT.ECT. ( #2 )- IT COULD BE ONE OF THE FOLLOWING ITEMS :: ( A ) - Check your vents , in the dryer and where it goes out ,the flappers may be stuck or blocked ; ; ( B ) - The heating element may be bad or the heat protector may be grounded out or the element it self may be faulty :::::
IF you have a VOLT-OHM meter (that will handle 220 0 Then I can lead you threw step by step on testing to find the trouble( MORE THEN LIKELY IT WILL BE THE HEAT ELEMENNT ::: You also could have a FAULTY START SWITCH:: A FAULTY SELECTOR SWITCH . WE WOULD START AT THE EASIEST ITEM FIRST AND GO STEP BY STEP ::
Tgail - check the items that are numbered then come back to this post and let us know what you find out :: Good luck and GOD BLESS ;; F.B.E.

Well checked all the parts and it was the heating element thanks for the help ;)

Tgail - please hit the ( RATE this answer at the bottom of my post :: Thanks for letting me know and am pleased to hsave helped ;;
Good luck and have a nice day ::GOD BLESS::: F.B.E.