My MIL just purchased a new home and the former owners put the gas hot water heater on "vacation", our friends do not know how to turn it on and the former owner is deceased, the relatives she willed it to do not know how to turn it on either. She called a service man and he is of no help and won't come until tomorrow and she is worried it will cost $50, just to turn it on.
Please, how do you turn on a GAS hot water heater safely?
Thank you very much