The grand rowhouses ringing Logan Circle and lining the blocks toward P and Q Streets were raised between roughly 1875 and 1900, and the tall-ceilinged parlors, deep floor plans, and ornate bays that make them so handsome are exactly what makes them hard to heat evenly. Most were plumbed for gravity hot-water or one-pipe steam from a single basement boiler, with cast-iron risers climbing two and three stories to feed radiators in every room. That original logic still governs how these homes warm up today — which is why a fourth-floor bedroom going cold, or a radiator that bangs every time the boiler fires, usually traces back to how the steam or water is moving through pipe that was laid more than a century ago.
This is the kind of heat a lot of DC contractors quietly avoid, because forced-air diagnostics don't translate to steam traps, air vents, and pitched returns. We work on it deliberately. In Logan Circle we get called for water hammer that rattles the plaster, radiators that stay lukewarm at the top while scalding at the bottom, boilers that keep dropping pressure or gulping make-up water, hissing or weeping valves, and the long, slow decline of a cast-iron boiler that has heated the house since long before the neighborhood's 1990s revival. We read the whole system before we touch a wrench, explain what's actually wrong in plain terms, and hand you an upfront, flat-rate price so a heating repair never drifts into an open tab. We're licensed and insured, available same-day and 24/7 when the heat quits on a January night, and every repair carries our satisfaction guarantee.
Logan Circle note: Many Logan Circle boilers and returns sit in damp English basements or run beneath finished parlor floors, so the real fix is often re-pitching a sagging line or freeing a buried steam trap, not just swapping a part — and because the homes fall inside the Logan Circle Historic District, we keep any visible flue, vent, or relocated equipment discreet to stay clear of approval headaches.
Common Boiler & Radiator Repair Issues We Fix in Logan Circle
- 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 Logan Circle.
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.