Why does not freshwater lakes become salty eventhough it meets ocean at somepoint? Do oceans grow more or less salty over time? If the oceans were only as salty as a fresh water lake, and had always been that way, would there be more life in the oceans that had evolved ...
Replacing a boiler typically costs an average of $50-$300, but this price can be drastically higher depending on where you live and the location of the boiler. Replacing leaking, aging, or bad ductwork costs an average of $35-$55 a linear foot for labor and materials, depending on the length and type of ducts.
Keep the water level in the proper range and the boiler should last for many years. It is difficult to say how much a replacement would be. I would expect a new boiler would be in the $4000 - $6000 range.I have no experience with boiler repair, so I can't advise you whether if it is even feasible. would expect a boiler to last 25 - 30 years. Your thermostat may have a battery in it, but I doubt it powers the control to your boiler. Try this experiment. Shut off the main breaker in the house, and then push the thermostat up and see if the boiler fires.