On this dryer the sensor must send signal to the board that ignition has occured and then 90 vdc is sent to the gas valve right? So if his ignitor is firing up that means he has power coming from some relay somewhere other than the control panel. Therefore the the control thermistat must be some sort of thermister connected to the main board. Are the coils remvable on the gas valve or do you have to replace the whole gas carrying assembly?