"my heater don't turn on polit is on it is made by williamson it is a gas fired water heater of my house heating"
My heater doesn't turn on. Pilot is on. It is made by Williamson. It is a gas-fired water heater (I guess "as part of my house heating system"?).
What kind of heating system do you have? Hot water, steam, baseboards, rads,....?