Repair of residential gas and electric boilers and hydronic heating systems — no-heat calls, kettling, lockout codes, circulator-pump failures, and pressure problems on radiator and baseboard loops, diagnosed flat-rate and fixed from a stocked truck.
More water heater services services in New Hampshire
Boiler Repair is one part of our water heater services coverage in New Hampshire. For the full picture — symptoms, costs, and when to repair vs. replace — start with the complete Water Heater Repair guide, or browse every water heater services service we offer.
A boiler is a different machine from a water heater: it heats the water that runs through your radiators, baseboards, or in-floor loops, and when it fails the symptom is a cold house, not a cold shower. Boiler repair is its own discipline — combustion and venting on the fire side, pressure, circulation, and air elimination on the water side, and a controls chain of thermostats, zone valves, and safeties in between. We service residential gas and electric boilers across New Hampshire with flat-rate diagnosis and the common failure parts on the truck.
Most no-heat calls come down to a short list: an ignition or pilot fault, a seized circulator pump, a stuck zone valve, a tripped high-limit, or system pressure that's drifted out of range. We work the chain methodically — verify the call for heat, confirm the burner fires, check pressure and circulation, and isolate the failed component — then quote the fix in writing before touching a wrench in the New Hampshire home.
Hydronic systems also fail slowly: kettling from scale on the heat exchanger, radiators that need bleeding every week from air ingress, or a expansion tank that's lost its charge and lifts the relief valve. Those are repairable conditions, and catching them early protects the boiler itself. We repair, descale, repressurize, and rebalance systems across New Hampshire — and we'll tell you honestly when a cracked heat exchanger means the boiler is done.
Different job? Start on the right page:
Water Heater Repair — if the unit heats your taps and shower, not the radiators.
Is it time for boiler repair? The signs
Radiators or baseboards stay cold
A cold zone with the thermostat calling means a circulator, zone valve, or air-lock problem; a whole-house no-heat points at the boiler itself. Either way it's a diagnosable New Hampshire repair, not a guess.
A boiler that rumbles like a kettle has scale insulating its heat exchanger, making it overheat the water locally. Descaling stops the noise and the efficiency loss in the New Hampshire system.
Lockout or error codes
Modern boilers lock out on ignition, flame-sense, and safety faults and show a code. We read it, fix the actual cause — igniter, sensor, venting — and clear it on the New Hampshire visit.
Pressure gauge out of range
Hydronic systems run in a narrow pressure band; too low and upper floors lose heat, too high and the relief valve drips. Both trace to fill valves, expansion tanks, or leaks we repair across New Hampshire.
Radiators need constant bleeding
Air returning week after week means the system is pulling it in somewhere — a failing air eliminator, a weeping fitting, or low pressure. Fixing the cause ends the New Hampshire bleeding ritual.
The causes we see & fix most
Scale on the heat exchanger
Hard water bakes mineral scale onto the exchanger, causing kettling and local overheating. A descaling flush restores quiet operation for the New Hampshire boiler.
Circulator pump wear
The circulator runs thousands of hours a season and eventually seizes or leaks at the flange. It's the most-replaced hydronic part in New Hampshire, and we stock common sizes.
Ignition and sensor faults
Igniters, thermocouples, and flame sensors age with every cycle and eventually fail to prove flame, locking the boiler out. Replacement is a same-visit New Hampshire fix.
Expansion tank losing its charge
A waterlogged expansion tank spikes system pressure every heating cycle and lifts the relief valve. Recharging or replacing it protects the whole New Hampshire loop.
Air and slow leaks
Weeping valve stems and fittings let water out and air in, corroding the loop from inside. Finding and sealing them ends both the pressure loss and the cold New Hampshire radiators.
Our boiler repair process, step by step
1
Start with a call — or book online. Pick a 2-hour window for boiler repair in New Hampshire, by phone or online. Within five minutes you get a confirmation carrying the assigned tech's name and photo.
2
We diagnose on-site. The tech diagnoses your boiler repair at the house — free on most repairs, $39 for minor service calls and waived if you proceed — and walks you through the issue and the fix before starting.
3
A written flat rate. You get a flat-rate boiler repair quote in writing, good for 30 days — no hourly creep and no add-ons after the fact.
4
Fixed in one visit. Most boiler repair work finishes the same visit: our trucks carry the common valves, fittings, cartridges, and fixtures, so a second trip is rare.
Boiler repair pricing in New Hampshire
Boiler Repair in New Hampshire starts at from $249, every boiler repair quote is flat-rate and presented in writing before work begins — no surprise add-ons, no hourly creep. Seniors (65+) and military save 10% on labor, and financing covers projects over $1,500 at 0% APR for 12 months, with no prepayment penalty.
Choosing a boiler repair company in New Hampshire
We've been a trusted choice since 1974 — over 50 years of family-owned plumbing service across New Hampshire. Our techs are CSLB-licensed (#1098234), background-checked, and complete an internal 12-week training program before rolling on calls alone.
Our boiler repair carries a 10-year workmanship guarantee — separate from any manufacturer warranty on the parts themselves. If the boiler repair we performed fails because of how we did it, we come back and fix it free for a full decade. Appliances and fixtures we install are backed by their full manufacturer warranty, and the parts and accessories we fit carry standard 1–5 year warranties by item.
We quote boiler repair on honest scope: no unnecessary up-sell, salaried (never commissioned) technicians, and a transparent diagnostic so you see exactly what we see — including the parts still in good shape. If a repair is the right call we say so; if replacement is the better long-term economics, we say that. The flat-rate boiler repair quote is written and good for 30 days.
Neighborhoods & cities we serve for boiler repair
We provide boiler repair throughout New Hampshire, with fast coverage in every major New Hampshire metro.
Outside New Hampshire? Our Boiler Repair nationwide page is the national hub for this service in all 50 states.
Reach times for boiler repair vary by traffic and time of day, so we quote an accurate ETA when you call — and the dispatch line routes straight to an on-call technician, no voicemail in between.
Frequently asked about boiler repair
Top questions homeowners searching for Boiler Repair near me ask us:
When is replacement smarter than repair?
A cracked heat exchanger, a rotted-out shell, or a 25-year-old unit needing its third major part — at that point we say so and quote a replacement honestly. Everything else on a New Hampshire boiler is usually worth repairing.
How much does boiler repair cost in New Hampshire?
Flat-rate by the failed component — an igniter, circulator, zone valve, or expansion tank each carry a fixed price we quote in writing before starting. Diagnosis across New Hampshire is a flat fee, waived when you proceed with the repair.
Boiler or water heater — which do I have?
If the unit feeds radiators, baseboards, or in-floor heat, it's a boiler; if it feeds your taps and shower, it's a water heater. Some New Hampshire homes have both. This page is for boilers — our water heater crews handle the tap-water side.
Do you service all boiler brands?
The major residential lines — Weil-McLain, Burnham, Navien, Bosch, Slant/Fin, and similar gas and electric models across New Hampshire. We carry universal igniters, sensors, and circulators for same-visit fixes.
My boiler is locked out — what should I do?
Power-cycle it once; if it locks out again, leave it off and call. Repeated relights against an ignition fault can soot the burner and turn a sensor swap into a bigger New Hampshire repair.