Dryer temp doesn't change with selector

No matter what is selected, (Delicates, Knits, Permanent Press, Heavy), the temperature on this gas Whirlpool Ultimate Care clothes dryer (Model LGR8848EQ3) is always the same (125-160 Fahrenheit). It does, however, cool down in the final 10 minutes of timed drying. A new thermostat made no difference. What needs to be replaced? What do I need to troubleshoot?

Well, 125-160 is the normal range of temperatures so I don’t understand the problem. Measuring the temperature at the dryer exhaust duct, what are the temperatures for each setting of the temp switch? You have to wait a few minutes for the temps to settle as the overall temp is achieved by cycling the burner on/off at different duty cycles for each temp setting.

Eric

My husband turned the dryer on, selected a setting and tested the temperature at the dryer duct several times. He repeated this for each setting and got temperatures ranging from 125-160 for each setting while the burner cycled on and off. I would think, at the very least, the delicates and knits cycles should not get as hot as 160, right?