Installed heat sensor which was very easy because once you remove front panel you can see all the things to check with your multimeter of which i just learned how to use,checked heat sensor and it was bad, so i ordered it,. my dryer was 9 or 10 yrs.old so for good measure i also ordered 2 gas valve coils and installed them althow old coils were still good. ordered parts about 2 o'clock and next day they came . very good service and fast. next project i will order from again.