Dryer runs, but no heat

Removed screws in hinges and on opposite side inside the door to remove the front panel.

You can put the door back on at this point to run the dryer with the burner exposed. At this point I could tell that the igniter was working and the gas valve would occasionally work so that burner would fire. The valve only seemed to work when everything was completely cooled down. I first replaced only the solenoid coils on top of the valve, this did not fix the problem. When I replaced the entire valve the problem was fixed.

Replacing the valve is easy.

1) Unplug dryer from wall outlet
2) Turn off gas supply cutoff valve
3) Remove door and front panel
4) Unplug wires from solenoid coil terminals. There are two coils on top of the valve body.
5) Remove gas line from valve body.
6) Remove two screws which secure the bracket holding the valve body and burner nozzle to the bottom of the dryer cabinet.
7) Remove two screws which secure the valve to the bracket.
8) Reverse the procedure for installation of new valve.