Removed top, controller, brace over front panel, front panel. Plugged controller back into main board and test ran dryer. No igniter glow. Using Tech Service Sheet and multi-meter, checked for open circuited components. Found the reset-able high temperature switch tripped (reset it) and the other high temperature switch open circuited. Both of these are mounted to the flame chute.
Jumpered out the open high temperature switch and test ran the dryer. Igniter began to glow, the gas solenoids opened and the flame started. This was done to prove that all the other components worked. However, the flame was very large, too hot and yellow.
There is no natural gas here, only LP gas. Dryers are fitted for natural gas and need to be converted in the field if LP gas is used.
The large flame would have been the cause of the high temperature switch failing. Probably also scorched a few sheets too.
Replaced both high temperature switches and installed the conversion kit for LP gas.