dryer did not shut off no heat

took control pannel apart removed timer took new timer and replaced wire for wire the mounted new timer . removed old buzzer and replced wire for wire then mounted new buzzer screw was just in case I lost or stripped old one not needed . reassembled control pannel ,tested and found I needed more parts no heat so I opened the bottom and I ordered Igniter, sensor ,and thermostat and new coil kit . now i have heat but thermostat is back ordered timer works but not on regular auto dry but I do have heat ?? it has to be thermostat . now all the repair was relitivly easy but you had to watch and be carefull of what you were doing . when thermostat comes in I hope that will solve all the problems if not