I've a Whirlpool Dryer was working fine in first load of drying today. Second load and it won't heat (Timer and drum work OK). Heating element fine by checking it connectivity. So I also checked its Thermostat. It has 4 different Thermostat, and I checked with my multi-meter with result as below: 1) Fuse Thermal - checked connectivity OK 2) Thermostat High Limit 250 F - connectivity OK 3) Thermal Cut-Off (Hi limit Thermostat illus.) - no connectivity - I tried to short it and turn on the dryer, but still not heating. 4) Thermostat internal Bias - Two Red thick Wire connectivity OK; 2 Brown thin wire has no connectivity. Can anyone tell me what is the above result mean? Where went wrong? Thank you.