If the IGNITER functions (glows red)---likely a "tripped" THERMAL LIMITER.
The Thermal Limiter is located at the 7 o'clock position on the Burner Assy (if looking at it from the front of the dryer).
There's a small reset button on the THERMAL LIMITER.
Push the reset button---if it makes a *click* sound---it was "tripped".
Also---replace the THERMOSTAT on the Burner Assy (6931EL3004B
When done---clean/clear the *entire* exhaust vent system in the home---from behind the dryer through to the outside dryer vent hood.
Vent systems that are buried in walls---require the services of a professional vent cleaning company---for best results.