Boiler Repair, Explained Straight.
Boilers are rare enough in Central Texas that most HVAC outfits quietly hope you will not call about one. We actually work on them: the ranch houses with hydronic loops, the older Hill Country homes with radiators, the shops running hydronic slab heat. If your boiler is cold, kettling, leaking, or losing pressure, this is the right page and the right phone number.
Heating · Burnet & Central Texas
The Machine Most Shops Will Not Touch
Call three HVAC companies about a boiler around here and two will suggest you replace it with a heat pump before they have seen it. Sometimes that advice is even right, but it should come after a diagnosis, never instead of one. Hydronic heat is a different discipline: water chemistry, pressure dynamics, expansion tanks, circulator pumps, zone valves, aquastats. A tech who learned the trade properly, and Bryce learned it the second-generation way, treats a boiler as a system to understand rather than a nuisance to talk you out of.
The failure patterns are their own world. A boiler that fires but never warms the house points at circulation, a seized pump or an airbound loop, rather than the burner. Kettling, that rumble like a giant tea pot, means scale on the heat exchanger flashing water to steam. Pressure that climbs and pops the relief valve says the expansion tank is waterlogged. Pressure that keeps dropping says there is a leak somewhere in the loop, found or not. Short cycling often traces to a control or a clogged strainer. Each has instrument signatures, and each has a proper fix.
Parts availability is the honest challenge with boilers here, and we manage it straight: common controls, pumps, and valves we can usually source fast, older or exotic components get a real lead-time answer instead of a vanishing contractor. Either way the system gets made safe first, always.
There is also a Hill Country layer to this work that out-of-area advice never accounts for. Limestone terrain around Burnet soaks up heat all day and radiates it back through the evening, so equipment here runs longer and later than the same unit would in a milder market. Humidity rolling off Buchanan, LBJ, and the rest of the Highland Lakes chain works on coils, drain lines, and cabinet steel every month of the year. Then winter shows up sideways: a sixty-degree afternoon collapsing into an overnight freeze finds every marginal component in the county at once. Doing boiler repair correctly here means doing it for this climate, with parts choices and settings that respect what Central Texas actually does to machinery.
Heating
Boiler Calls We Actually Run
Hydronic problems sort into a recognizable list once you have worked enough of them. Here is what fills the boiler side of our board.
No heat, boiler cold
Ignition, gas supply, aquastat, or safety lockout. We trace the firing sequence step by step instead of swapping parts alphabetically.
Fires but house stays cold
Circulation failure: seized pump, airbound loop, or a stuck zone valve. The burner was never the problem and we will not bill you like it was.
Kettling and rumbling
Scale on the exchanger flashing water to steam. We descale, correct the chemistry, and quiet the machine before the exchanger pays the price.
Pressure climbing or relief valve dripping
A waterlogged expansion tank most often. Straightforward fix, big consequences if ignored.
Pressure dropping over days
A leak in the loop, visible or hidden. We pressure-test and isolate zones to find it rather than just topping up forever.
Radiators or zones cold in spots
Air in the loop, balancing problems, or a lazy zone valve. Bleeding and balancing bring the quiet rooms back to life.
Skip the reading, make the call.
Two minutes on the phone with a real tech beats an hour of internet research. Describe the symptom in your own words and get a straight answer about cause, timing, and cost.
Why Off Duty
Respect for an Older Technology
Here is something the replace-it-all crowd misses: a well-maintained boiler is a superb heating machine. Hydronic heat is quiet, even, dust-free, and comfortable in a way forced air struggles to match, which is why the owners of these systems tend to love them. Our default is to keep a good boiler alive honestly: real repairs, correct water treatment, and straight answers about which parts of the system are aging. When a boiler genuinely reaches the end, you get the full range of options explained, like-for-like replacement or a conversion, with the real costs and comfort tradeoffs of each.
Safety gets the last word on every boiler call. Combustion gets checked, venting gets inspected, and safety controls get tested, every visit, no exceptions, because a fuel-burning appliance with a water jacket deserves that respect. If we ever find a condition that is genuinely unsafe, you will hear it plainly with the machine shut down, and you will get the fix path the same hour.
The process here never changes, whether the job is boiler repair or a full system swap. Step one, you call (512) 925-3090 and a human answers, around the clock. Step two, we test until the real cause is proven, because parts-swapping on a hunch is how invoices grow. Step three, you get the failure, the fix, and the exact number explained to the point before we touch a thing. Step four, we do the work to spec and prove it under load before we leave. Our customers keep writing reviews about exactly this rhythm, which tells us to keep it.
On pricing, the policy is the same as everything else here: out loud and up front. The visit cost gets stated on the phone before anyone drives anywhere. The repair price gets stated after diagnosis and before work. No packages with hidden contents, no commission-driven upsell in the truck, and no number on the invoice you did not already hear.
One honest note about timing. Problems in this category rarely improve on their own, and the price of waiting is usually a bigger bill: the weak part takes a healthy one with it, the small leak becomes a stain on a ceiling, the strange noise becomes a seized motor. Calling early is almost always the cheaper version of the same repair, and the phone consult costs nothing: describe what you are seeing and we will tell you honestly whether it can wait.
As for who shows up: this is an owner-operated shop, so the tech at your door is usually Bryce himself, a second-generation HVAC man with ten years on the tools, licensed, insured, and photographed doing exactly this kind of work in the job gallery. No commissioned salesman rides along, and nobody at this company earns a bonus for talking you into more than you need.
Coverage is the same as everything else we do: Burnet at the center, about 100 miles in every direction. That means the lake towns, Marble Falls, Kingsland, Horseshoe Bay, the corridor through Leander, Cedar Park, and Georgetown, plus Austin, Bell County, and the outer ring through Waco, San Marcos, New Braunfels, Fredericksburg, and Boerne. The full sixteen-county list lives on the service areas page, and if you sit just past the edge of it, call anyway and get an honest answer.
Diamond Contractor
Mitsubishi’s top ductless credential, earned with factory training.
Second Generation
Raised in the trade, ten years on the tools before the name went on a truck.
Warranty Authorized
JB and Mitsubishi warranty work: we file the claim, you skip the fight.
Open 24 Hours
A real person answers the phone at any hour, every day of the year.
The Standard
How This Work Gets Done Here
Every trade job carries an invisible line item: the standard it was done to. On boiler repair work, ours reads like this. The diagnosis is proven with instruments, because guessing is expensive and it is your money on the table. The parts that go in are parts we would put in our own house, matched to spec instead of whatever was cheapest on the shelf. The workmanship follows the manufacturer’s book and the Texas code book both, because shortcuts hide for exactly one season and then bill you with interest.
When the work is finished, it gets tested the way it will actually be used: under load, at temperature, with the readings written down. Then the area gets left the way we found it or cleaner, the old parts get shown to you on request, and the invoice matches the number you already heard. If anything acts up afterward, you call the same number and the same person answers. That is the entire warranty conversation most customers ever need, and it is why the reviews keep saying the same three things: honest, fair, showed up.
Boiler Repair Questions
Asked Before We Roll a Truck
Real questions from real Central Texas customers, answered the same way we answer them on the phone: straight.
You really repair boilers, or will you just quote a replacement?
We really repair them. The diagnosis comes first, on instruments, and the repair quote reflects what the machine actually needs. Replacement enters the conversation only when the numbers put it there: a cracked heat exchanger, a parts-unavailable control on a forty-year-old unit, or a repair bill crowding the value of the system. Even then you get both paths priced and explained. Plenty of boilers leave our schedule running better than they have in years, and their owners were braced for a sales pitch that never came.
What is that rumbling sound my boiler makes?
Almost certainly kettling: mineral scale has coated the heat exchanger, water trapped against the hot metal flashes to steam, and the collapsing bubbles make the rumble. Hill Country water is hard, so scale builds faster here than the manuals assume. It is fixable, descaling plus water treatment, and worth fixing promptly, because the same scale forcing that noise is insulating the exchanger, cutting efficiency, and stressing the metal with every cycle. A quiet boiler is a healthy one.
Why does my boiler keep losing pressure?
Water is leaving the loop somewhere. Sometimes visibly, a drip at a valve or fitting, sometimes invisibly into soil around buried lines or through a relief valve that seeps only when hot. Topping the system up weekly is treatment of the symptom, and the fresh water it adds brings new oxygen and minerals that accelerate corrosion and scale. We pressure-test, isolate zones, and find the actual escape point. One proper repair beats a season of topping up, on both cost and boiler health.
How often should a boiler be serviced?
Annually, before heating season, and the visit is more involved than a furnace check: combustion analysis, safety control tests, expansion tank pressure, circulator health, water chemistry, and a look at venting. Central Texas boilers sit idle through long summers, which breeds its own problems, seized pumps and stuck valves love a six-month nap. The October service catches all of it while the weather is still kind. If your boiler has gone years without service, book the visit before you need the machine, honestly.
Can you get parts for an old boiler?
Usually, with honesty about timing. Common circulators, zone valves, aquastats, and ignition components cross-reference well and can often be sourced quickly. Genuinely obsolete controls on decades-old equipment take longer, and you get the real lead time up front, plus safe interim heat arrangements if the machine has to wait. What you will never get is the vanishing act, where the contractor stops answering because the part hunt got tedious. We stay on it and keep you posted, because that is just the job.
Related work: Boiler Maintenance · Boiler Replacement · Radiant Heating Repair · see real jobs in the gallery
Find the Boiler People
Describe what it is doing, kettling, leaking, or just cold, and get an answer from someone who actually works on them. Prefer to write it out? Send the form and we call you back.
(512) 925-3090 Book a Free Look
