Do you charge a diagnostic fee for boiler service?

Aire Serv of Alamo Heights waives the diagnostic fee from your total invoice when you complete the repair or move forward with a new installation. Pricing is confirmed upfront and charged by the job rather than by the hour, so the amount you approve is the amount you pay, whether the work happens on a Tuesday morning or a Saturday evening. New customers also receive $50 off their first completed repair.

How long does a boiler last?

Most residential boilers last 20 to 30 years with annual maintenance, which is considerably longer than a typical forced-air furnace. Lifespan depends heavily on water quality, since scale buildup on the heat exchanger accelerates wear, and on whether the system was properly sized and vented at installation. Once a boiler passes 25 years and needs a major component, replacement is usually the better financial decision.

Why does my boiler keep losing pressure?

Repeated pressure loss almost always indicates a leak or a failed expansion tank. Common sources include the pressure relief valve, a waterlogged expansion tank that can no longer absorb thermal expansion, a leaking circulator seal, or corrosion in the piping or radiators. Because a leaking boiler can damage flooring and framing before it is visible, we recommend scheduling an inspection as soon as you notice repeated pressure drops.

Why is my boiler making a banging or rumbling noise?

A banging or rumbling boiler is usually kettling, caused by mineral scale forming on the heat exchanger and trapping steam pockets. Hard water accelerates the process. Kettling reduces efficiency and puts stress on the heat exchanger, so it should be diagnosed promptly rather than ignored. Depending on severity, the fix ranges from a system flush and water treatment to heat exchanger replacement.

Can you service a radiator system without replacing the boiler?

Yes, radiators, zone valves, circulator pumps, thermostats, and controls can all be serviced or replaced independently of the boiler. Many uneven-heat complaints are resolved by bleeding trapped air from radiators or replacing a zone valve rather than touching the boiler at all. We inspect the full hydronic loop before recommending any equipment replacement.

Do you offer emergency boiler service?

Yes, Aire Serv of Alamo Heights answers calls 24 hours a day, including nights, weekends, and holidays, and offers same-day appointments. Because we charge by the job rather than the hour. If you smell gas or your carbon monoxide detector activates, leave the building first and call from a safe location.

Boiler repair and replacement in Alamo Heights, TX

Upfront pricing by the job, with the diagnostic fee waived when you complete the repair

Boiler systems are less common in South Texas, which makes finding a qualified service professional harder. Aire Serv of Alamo Heights repairs and replaces boilers and hydronic heating systems throughout Alamo Heights, Terrell Hills, Balcones Heights, Kirby, Castle Hills, Windcrest, and Monte Vista. We answer calls 24 hours a day, schedule same-day and Saturday appointments, and confirm pricing before work starts. Every visit carries the Neighborly Done Right Promise®.

Upfront pricing by the job, with the diagnostic fee waived when you complete the repair

Residential
Commercial

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Boiler Problems We Diagnose and Repair

Boiler faults usually announce themselves through pressure, noise, or heat distribution. Our service professionals in Alamo Heights diagnose the cause before quoting a repair, so you are not paying for parts that were never the problem.

No heat or intermittent heat commonly traces to a failed circulator pump, a stuck zone valve, a faulty aquastat, a failed thermocouple or ignition control, or an air-locked loop. Low pressure often means a leaking relief valve, a waterlogged expansion tank, or a leak somewhere in the piping. Kettling, that rumbling or banging sound during operation, usually indicates scale buildup on the heat exchanger from hard water.

Uneven heat across rooms or floors typically points to trapped air in the radiators, a zone valve that no longer opens fully, or circulation problems in one loop. Visible corrosion, persistent water around the base, or a relief valve that discharges repeatedly all require immediate inspection.

We repair and service boilers from all major manufacturers, including Dunkirk, Pensotti, Energy Kinetics System 2000, Lennox, Rheem, and Bryant, along with the radiators, zone valves, circulators, and controls connected to them.

Pricing is confirmed before we start, charged by the job instead of the hour. Our current offer waives the diagnostic fee from your invoice when you complete the repair, and $50 off applies to your first completed repair. We are fully insured, and financing is available on replacement projects.

Commonly traced to a failed circulator pump, a stuck zone valve, a faulty aquastat, a failed thermocouple or ignition control, or an air-locked loop. We diagnose the cause before quoting parts.
Repeated pressure drops usually mean a leaking relief valve, a waterlogged expansion tank, a failing circulator seal, or corrosion in the piping. Leaks can damage flooring and framing before they become visible.
Rumbling or banging during operation typically indicates mineral scale on the heat exchanger from hard water. Uneven heat across rooms usually points to trapped air, a partially open zone valve, or a circulation fault in one loop.

When Boiler Replacement Makes More Sense Than Repair

Boilers are durable. Many run 20 to 30 years with consistent maintenance, which is longer than most forced-air furnaces. That longevity means the repair-versus-replace decision usually arrives later, but when it arrives, the numbers matter.

Replacement generally becomes the better value when the heat exchanger is cracked or corroded through, when the unit has passed 25 years and requires a major component, or when repair costs have accumulated across consecutive heating seasons. A heat exchanger failure cannot be safely repaired, and continuing to operate a compromised unit creates a combustion safety risk.

Efficiency is the other consideration. Older cast-iron boilers commonly operate well below the efficiency of modern condensing units, and in a home that relies on hydronic heat, that gap shows up on every winter utility bill. Newer boilers also modulate output rather than running full-on and full-off, which produces steadier temperatures across zones.

Because boiler and radiator systems are relatively rare in Alamo Heights, Monte Vista, and Terrell Hills, they are often found in older homes where the piping, expansion tank, and controls have aged alongside the boiler itself. We inspect the full system rather than the appliance alone, so a replacement recommendation accounts for what the existing loop can support.

You get written options with pricing before anything is ordered, and we explain what each path costs over the next several years rather than only today. Financing is available, calls are answered 24 hours a day, and there is no additional charge for evening or weekend work because we bill by the job.

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When Boiler Replacement Makes More Sense Than Repair

The Aire Serv Advantage

From tune-ups and maintenance to heater repair and air conditioning replacement, we provide services that keep the air you breathe clean and keep your home or business at the perfect temperature.

Guaranteed Upfront Pricing

We quote by the job not the hour, so you know the final price won't change with no hidden fees.
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The Neighborly Done Right Promise^®

We'll get the job done right and ensure you are happy with our work.
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We Treat Your Home Like Our Own^®

Expertly trained, background checked, and committed to respecting your home and putting you first.
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Anytime Customer Service

We're here for you 7 days a week, 365 days a year, and we always take extra precautions to safeguard your home during our visits.
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Aire Serv of Alamo Heights

Aire Serv of Alamo Heights repairs and replaces boilers, radiators, and hydronic heating components for homes and businesses in Alamo Heights, Terrell Hills, Balcones Heights, Kirby, Castle Hills, Windcrest, Monte Vista, and surrounding San Antonio neighborhoods. Calls are answered 24 hours a day, and every visit is backed by the Neighborly Done Right Promise®.

HVAC Services in Alamo Heights and Surrounding Areas

Alongside boiler service, our insured professionals handle furnaces, heat pumps, air conditioners, mini-splits, radiators, ductwork, water heaters, and indoor air quality systems throughout Alamo Heights and nearby communities. We service all major brands and confirm pricing before work begins. Review the services below or schedule your appointment online.

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Commercial

Boiler Repair and Replacement FAQs

Boiler systems operate differently from forced-air heating, and homeowners in Alamo Heights often have questions about pressure, noise, lifespan, and cost. The answers below explain the most common failures we see, how we price the work, and when replacement becomes the better investment. Our team is reachable 24 hours a day for anything not covered here.

Most residential boilers last 20 to 30 years with annual maintenance, which is considerably longer than a typical forced-air furnace. Lifespan depends heavily on water quality, since scale buildup on the heat exchanger accelerates wear, and on whether the system was properly sized and vented at installation. Once a boiler passes 25 years and needs a major component, replacement is usually the better financial decision.
A banging or rumbling boiler is usually kettling, caused by mineral scale forming on the heat exchanger and trapping steam pockets. Hard water accelerates the process. Kettling reduces efficiency and puts stress on the heat exchanger, so it should be diagnosed promptly rather than ignored. Depending on severity, the fix ranges from a system flush and water treatment to heat exchanger replacement.
Repeated pressure loss almost always indicates a leak or a failed expansion tank. Common sources include the pressure relief valve, a waterlogged expansion tank that can no longer absorb thermal expansion, a leaking circulator seal, or corrosion in the piping or radiators. Because a leaking boiler can damage flooring and framing before it is visible, we recommend scheduling an inspection as soon as you notice repeated pressure drops.
Aire Serv of Alamo Heights waives the diagnostic fee from your total invoice when you complete the repair or move forward with a new installation. Pricing is confirmed upfront and charged by the job rather than by the hour, so the amount you approve is the amount you pay, whether the work happens on a Tuesday morning or a Saturday evening. New customers also receive $50 off their first completed repair.
Yes, radiators, zone valves, circulator pumps, thermostats, and controls can all be serviced or replaced independently of the boiler. Many uneven-heat complaints are resolved by bleeding trapped air from radiators or replacing a zone valve rather than touching the boiler at all. We inspect the full hydronic loop before recommending any equipment replacement.
Yes, Aire Serv of Alamo Heights answers calls 24 hours a day, including nights, weekends, and holidays, and offers same-day appointments. Because we charge by the job rather than the hour. If you smell gas or your carbon monoxide detector activates, leave the building first and call from a safe location.

Residential
Commercial