How can you test the steam heat, house pipes, when furnace has been dead for 19 yrs.? The house was built in 1939, and has numerous problems I'm trying to fix where possible. No heat in the house for 19 yrs. hasn't been good for either the physical plant of the house or myself. I have inquired about the heat; but, I was told, the furnace would have to be replaced before the rest of the system (pipes and radiators) can be tested?? Why would I pay for a new furnace when I don't know about the pipes.. ISN'T THERE SOME WAY TO TEST THE PIPES BEFORE PAYING FOR A NEW FURNACE AND ITS INSTALLATION?? I'm praying the pipes are OK; but, it seems to me the should be checked first.