Maryland · Heating · 24/7 emergency
Boiler Repair Service in Maryland
Steam and hot-water boiler repair by technicians who actually work on hydronic systems — including the 60-year-old ones still heating half of Takoma Park.
Hydronic work is a specialty, and it is disappearing. Plenty of HVAC companies in this market will happily replace your air conditioner and quietly hope you never ask about the boiler in the basement. We repair steam and hot-water systems every winter, including one-pipe steam systems with original main vents and cast-iron sectional boilers older than the technicians working on them.
The most common calls are no heat in one zone, banging pipes, a boiler that will not maintain pressure, a low-water cutoff locking the unit out, and a system that heats the first floor but not the third. Every one of those has a diagnosable cause — air in the loop, a failed circulator or zone valve, a waterlogged expansion tank, a clogged main vent, or wet steam from a boiler that needs skimming. Guessing is expensive; measuring is not.
Where we workScope
What the job actually includes
- Full hydronic diagnosis: pressure, temperature, circulator operation, zone valve function and air content
- Steam-specific service: main vents, radiator vents, pigtails, low-water cutoff and skimming
- Expansion tank test and recharge or replacement
- Circulator and zone valve replacement, with correct flow direction and isolation flanges
- Combustion analysis and CO test on gas- and oil-fired boilers
- System purge of trapped air, zone by zone
- Water treatment check on closed-loop systems
Maryland specifics
Code, permits and rebates
Boiler repairs do not require a Montgomery County permit, but replacement does, and any gas piping alteration does. Maryland's carbon monoxide alarm requirements apply to homes with fuel-burning boilers, and older atmospheric boilers sharing a masonry chimney are a common source of draft problems in this area — particularly after a high-efficiency furnace or water heater has been installed alongside and orphaned the flue. We check draft on every boiler visit.
Licensing
MD HVACR Contractor License #01-XXXXX. All refrigerant handling is performed by EPA Section 608 certified technicians, and equipment replacement is permitted and inspected through the county.
Process
How we run a boiler repair job
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Identify the system type first
One-pipe steam, two-pipe steam, gravity-converted hot water and modern zoned hot water all fail differently and get diagnosed differently. Half of bad boiler repairs start with a technician treating a steam system like a hot-water system.
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Read the gauges
Pressure, temperature and the sight glass tell the story. Steam systems should run at ounces of pressure, not pounds — a pressuretrol set at 5 psi on a residential one-pipe system is a classic cause of banging, uneven heat and wasted fuel.
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Trace the affected zone
For a cold zone we check the circulator or zone valve, the thermostat call, and whether the loop is airbound. For a cold radiator on steam, we check the vent, the pitch and the supply valve before assuming a boiler problem.
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Repair and rebalance
After the repair we purge air, verify every zone comes up to temperature, and re-check pressure at operating temperature — not cold.
Pricing
What moves the price
We do not publish a single number, because a number without your house attached to it is marketing rather than information. These are the variables that actually decide what a job costs, and we itemise all of them in writing before any work begins.
Component versus system fault
A radiator vent or thermocouple is a small repair. A failed circulator, zone valve or aquastat is moderate. A cracked section in a cast-iron boiler or a leaking heat exchanger in a condensing unit is a replacement conversation.
Access and age
Sixty-year-old threaded black iron in a tight Takoma Park basement does not disassemble as cooperatively as modern piping. We quote realistically rather than optimistically.
Parts for legacy equipment
Many parts for older Weil-McLain, Burnham and Peerless boilers are still available. Some obsolete controls are not, and the honest answer is sometimes a control retrofit instead of a like-for-like replacement.
Local coverage
Boiler Repair Service by service area
Every one of these pages is written for that specific market — the housing stock we actually find there, the permitting authority, the utility situation and the failure patterns that repeat in those streets.
Montgomery County
Boiler Repair in Silver Spring
Steam and hot-water boiler repair for Silver Spring's pre-war housing
Read more →Montgomery County
Boiler Repair in Olney
Hydronic and oil boiler service for Olney and Sandy Spring
Read more →Montgomery County
Boiler Repair in Potomac
Hydronic and radiant repair for Potomac's complex mechanical rooms
Read more →Montgomery County
Boiler Repair in Bethesda
Hydronic repair for Bethesda's pre-war homes and renovations
Read more →Montgomery County
Boiler Repair in Germantown
Hydronic service for Germantown condominiums and radiant systems
Read more →Montgomery County
Boiler Repair in Takoma Park
Steam and hydronic repair for Takoma Park's century-old systems
Read more →Questions
Boiler Repair Service questions
Why do my pipes bang when the heat comes on?
One radiator stays cold while the rest heat. What is wrong?
My boiler keeps losing pressure. Is that serious?
Do you service oil-fired boilers?
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Tell us what the house is doing.
Describe the problem and we will tell you what it usually means, what it typically costs to diagnose, and when we can be there. No obligation, no scripted sales call.
Mon–Fri 7:00am–6:00pm · Saturday 8:00am–2:00pm · 24/7 emergency service