Mount Pleasant's housing stock is largely early-1900s rowhouses and a handful of grand apartment buildings off the avenue, and a lot of them are still heated the way they were built to be: cast-iron radiators fed by a steam or hot-water boiler in the basement. That's a beautiful, durable system when it's tuned right, but it's also a kind of heat most modern HVAC techs rarely touch. We do. When a radiator on your top floor stays cold while the one in the living room cooks you out, the problem is usually a stuck steam trap, a clogged air vent, or a system that's lost its balance over decades of partial repairs, and chasing it takes someone who actually understands one-pipe and two-pipe steam, not just forced air.
The other thing that comes with a hundred-year-old building is age in the iron itself. We see tired sectional boilers losing pressure, water-logged returns, leaking valve packings, and the wet, knocking water hammer that wakes the whole house when the heat kicks on at 5 a.m. Some of these systems are worth restoring and rebalancing; others are candidates for a high-efficiency boiler swap or a ductless mini-split retrofit that respects a home with no room for ductwork. We'll tell you honestly which camp your system is in, give you upfront flat-rate pricing before any wrench turns, and back the work with our satisfaction guarantee.
Mount Pleasant note: Mount Pleasant sits inside a historic district, so exterior changes near the street face and visible flue or condenser placements can trip preservation review. We plan boiler venting and any mini-split line-set and condenser routing with that in mind, keeping the work compliant and as unobtrusive as the block deserves.
Common Boiler & Radiator Repair Issues We Fix in Mount Pleasant
- Banging, knocking, or hammering noises in pipes and radiators (water hammer)
- Cold or only partially warm radiators and uneven heating between floors
- Failed or stuck steam traps and air vents
- Boiler leaks, low water level, or pressure problems
- Aging cast-iron boiler at end of life — repair or replace?
- Hissing radiator valves and trapped air needing bleeding
What's Included
- Diagnosis and repair of water hammer and loud banging pipes
- Fixing cold or unevenly heating cast-iron radiators
- Steam trap testing, repair, and replacement
- Leak detection and repair on boilers, valves, and piping
- Low-water and low-pressure troubleshooting and correction
- Radiator bleeding and whole-system balancing
- Annual boiler tune-ups and safety inspections
- Honest assessment and replacement of aging cast-iron boilers
Explore our full Boiler, Radiator & Steam Heat Repair service, or see all HVAC services in Mount Pleasant.
What It Costs
Most boiler and radiator repairs in Washington, DC fall between $200 and $1,000, depending on the part and the labor involved, while major repairs on older systems can run from $1,200 to $3,000 or more. An annual service and tune-up typically runs $200 to $500, and a full boiler replacement generally lands between $6,500 and $11,500. Every system is different, so call us for a free, no-obligation estimate before you decide anything.