Installation of new gas valve and thermopile. Existing gas valve has gone bad and unable to relight water heater. Spark button on gas valve is broken. Drained down water heater for the installation of a new gas control valve. Retested thermopile and thermopile checked out good. Was no need to replace. Discounted thermopile and 10% off. Refilled water heater and tested. Heater is currently working as should. Give about an hour for the heater to satisfy. If temperature is to high or to low, adjust temperature at control valve.