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On average, boiler repair costs $349 nationally, with most homeowners spending between $172 and $526. This data is based on actual project costs as reported by HomeAdvisor members.
Most boilers and radiators need repair and service in order to continue working at optimum efficiency. Boilers are relatively efficient, but not always easy to fix. Hiring the right professional that offers a solid warranty on their workmanship is essential in keeping your home comfortable.
How does the system work?
Generally, a hot-water heating system consists of a boiler to heat water, a network of pipes that distributes the water, and radiators or radiant flooring that heat various rooms. Controls include a combination gauge that lets you check water temperature and pressure and lets you know when the boiler needs water or is malfunctioning. In some systems, a pressure-reducing valve takes care of the water automatically. The typical system also has an expansion tank that must be properly charged with air to prevent the water from boiling. Newer systems usually locate the expansion tank on the basement ceiling near the boiler; they also include a purge valve to release water and let in air as needed. Older systems sometimes have the expansion tank in the attic and include a gauge glass similar to that on a steam boiler.
Because they have few mechanical parts, hot-water heating systems usually perform reliably for many years. The most common problems are with the expansion tank or a circulator rather than the boiler. A hot-water system may produce no heat or poor heat and leaks can occur. These can be attributed to many problems from improper water levels to mineral deposits to a pilot or burner ignition malfunction. Other common problems are that some radiators may not heat while others do or your pipes may make a clanging noise. Whatever your issue, hire a professional to fix it. When dealing with electrical systems and water - you don't want to take any chances with your safety.
Repair Cost Factors
The best way to keep your costs down is to perform regular maintenance on your system. Most problems that occur with your boiler are "nickel and dime" expenses that will add up. It's always less expensive and less of a hassle to try and repair your boiler than it is to replace it. Boilers can last 20 years or more and by keeping it in working order, you won't find yourself in a cold shower facing an emergency situation to get your boiler fixed. Some insurance companies offer "boiler insurance" that can help you alleviate the costs and maintenance costs accrued. Most boiler technicians will charge by the hour and you may miss a day of work in order to let the repairman in.
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