Inconsistant Heat... had heat for one cycle and none the next or heat would stop half way through dry cycle

Removed the screws from the back of the control panel. Unplugged the old timer assembly and the timer knob. Plugged in the new timer assembly and put the timer knob on. Put the back panel back on and screwed it back on. Very simple. The dryer now works like new. It has instant heat right away and everytime it used. The selector knob was also installed by just slidding it on. I absolutely love this website...it's save me so much money in having to pay someone else to fix it. :)