Here is how you check it. If the ignitor comes on, replace the coils. If the ignitor does not comes on, in the back of the dryer, there is a white part, about an inch and a half long, by a half inch wide, it is a thermal fuse. Take the two wires off of it, and ohm it out. If you get no reading it is bad, replace it, and that will do the trick. If it is good, then go to the flame sensor, mounted on the side of the flame tube. Pull one of the wires off of it, and ohm it out. If you get no reading, replace it, and you will be good. If you get a reading, then replace the ignitor. There you have it, blow by blow. Follow those directions, and let me know what you find. Tom ApplianceEducator.com