Boiler Repair in Merrimack, NH
Voted Manchester, NH Top Plumbing Company
- High Quality
- Customer Service Focused
- 20+ Years Experience
Merrimack started as a string of small river villages and grew into a busy town between Nashua and Manchester, so its homes come from many different decades. In older sections like Reeds Ferry and Thornton’s Ferry, homes from the 1800s and early 1900s often still heat with steam or hot water radiators that deal with worn valves, sediment, and tired piping. The town’s biggest growth spurt in the 1970s and 1980s brought capes, split-levels, and colonials across neighborhoods on both sides of the Everett Turnpike, most with hot water baseboard and circulators that have been running for decades. Newer homes and condos built since then mostly use forced air furnaces rather than boilers.
LHR Plumbing and Heating works on all of them. Our boiler repair technicians are skilled with old radiator systems and modern condensing units, and you’ll know the price before any work begins.
Boiler Repair & Troubleshooting
Merrimack’s long winters keep boilers working hard for months, and many homeowners guess wrong about what’s really going on when the heat acts up.
- Many people assume cold rooms mean the whole boiler is shot, but a failed circulator, a stuck zone valve, or air in the lines is often the real problem.
- Banging or gurgling pipes can seem like a sign of something serious, though trapped air or water sitting in old piping is usually the cause.
- A little water near the boiler might look harmless, yet it often points to a relief valve, expansion tank, or pressure problem that needs attention.
- A pilot that won’t stay lit or an error code isn’t always a dead boiler, since a bad igniter, flame sensor, or control is a common fix.
- Higher fuel bills aren’t always about the weather, because a boiler that short cycles wastes fuel all season long.
We take the guesswork out, fix the root cause instead of the symptom, and test the full system before we leave.
Boiler Repair Prevention & Replacement
Homes in Merrimack change hands often, and many new owners have no idea how well the boiler was cared for before they moved in. A tune-up gives you a clear starting point and catches the kind of wear that leads to mid-winter repairs. We clean the burner, check pressure and safety controls, bleed the lines, and replace worn parts before they fail. Our membership plans keep that visit on schedule every year and give you priority service if a problem comes up later.
Time for a new boiler? If your boiler is close to 20 years old, needs repairs every winter, or can’t keep every room warm, replacement is usually the smarter choice. A high-efficiency boiler burns less fuel and delivers steadier heat. If the upgrade requires new or extended gas line work, we take care of it as part of the job, install to current code, and offer financing to help with the cost.
Furnace Repair for Newer Homes
Newer homes and condos in Merrimack are mostly built with forced air furnaces, and our furnace repair technicians handle them as often as boilers.
- A furnace that won’t light usually needs a new igniter, a clean flame sensor, or a control repair.
- A furnace that blows weak or cold air often has a blower, filter, or airflow problem.
- A furnace that works too hard can get help from heat pumps that share the heating load.
- A thermostat that doesn’t match the system can cause short cycling, so we install and set up the right one.
- A furnace that fails on a freezing night gets emergency heating repair, and we’ll thaw any frozen lines.
Boiler or furnace, one trusted number covers it all.
A Recent Boiler Repair in Merrimack, NH
Brian called us from his split-level in Reeds Ferry because the baseboard pipes were banging loud enough to wake the whole house every morning when the heat kicked on. Our technician found that a failed air vent was letting air build up in the system instead of releasing it. He replaced the vent, purged the air from each zone, and listened through a full heating cycle to make sure the noise was gone. Brian said the mornings were quiet again, and nobody in the house needed an alarm clock thanks to the pipes anymore.
Why Choose LHR Plumbing and Heating for Boiler Repair
Merrimack homeowners have good reasons to call us first.
- First, our certified technicians know older steam and hot water systems as well as modern high-efficiency boilers.
- Second, we give you transparent, upfront pricing before any work begins.
- Third, we offer same-day scheduling and emergency heating service when you need help fast.
- Finally, every job is backed by warranties and a satisfaction guarantee.
When you need heating, cooling, or plumbing help, one dependable team has you covered.
Frequently Asked Questions
Not necessarily. Many older boilers still have good years left with the right care. A tune-up and inspection will show us its condition so we can tell you honestly whether to keep it or start planning a replacement.
It’s often a dirty flame sensor, a failed igniter, or a clogged filter that makes the furnace overheat and shut off the burner. Our technicians can track down the cause and fix it fast.
In most cases, yes. Boiler replacements typically require a permit and inspection through the Town of Merrimack, and our team handles that paperwork for you.
Keep doors and windows closed, open cabinet doors on outside walls, and let faucets drip to help prevent frozen pipes. If the boiler doesn’t restart once the power is back, give us a call.
Yes. Our emergency heating service covers Merrimack, and we work to get a technician to you as fast as possible. Call us as soon as your boiler stops working.