You should repair your boiler when fixing it costs less than $600 to $1,000 or if the manufacturer's warranty is still valid to help cover repair fees. However, you should typically replace your boiler if it's more than 15 years old or costs more than $2,000 to repair.
A boiler replacements costs $2,200 to $7,000 for standard units or $4,000 to $10,000 for high-efficiency models. This price includes disposal of the old boiler as well as new wiring and plumbing connections. A new hot water tank is sometimes also necessary in some home systems.