Product review (5 stars): Fixed my aging Whirlpool Dryer.
My Whirlpool gas dryer would run, but there was no heat - the flame did not come on, and the igniter never even came on.  I thought at first it was the igniter, but I found a You Tube video that detailed how to test the sensors using a multi-meter.  This sensor (located right next to the burner) was the last one to test, and it failed (the multi-meter read zero when set to ohms and touching the leads to both terminals.)  I was able to remove and replace the sensor without removing the dryer drum, and after replacing it, the dryer started working again.