Hi Garry,
This is one of the most common situation.
You can find the complete troubleshooting instructions in the one of my previous posts:
No Heat on Gas Dryer
- The part number for the thermal fuse is
AP3132867
- The part number for the cycling thermostat is
AP3131939
- The part number for the igniter is
AP3094138
- The part number for the flame sensor is
AP2910747
- The part number for the gas valve coils kit is
AP3094251
Here are the break down diagrams for the Whirlpool dryer
Model LGR5636EQ3
Good luck.
Gene.