The pool that came with our house also has a Hayward H150 heater next to it. The previous owners said they never used it and we have not used it since moving it, so it likely has not been used in 6 years. Do you think that it should still work at this point in time? Is there anything we should have checked out on it? How much fuel do these things take to run (we are on propane)? Is there a solar heater that would work so we don't have to mess with figuring this thing out?