Hello,
In trying to trouble shoot may gas dryer I found out that when I first start the dryer, in putting my hand over the dryer exhaust the air comes up to hot/warm temp but then shortly after starts blowing cool air. The temp swith will be on REGULAR. The air will go cold and I switch it to MEDIUM (switch). Air will then go HOT/WARM but then returns to cold. Seems like to me it is either the Dryness or Radiant sensor. Are thes sensors easy to get to and change out.