Steam Radiator Repair in Boston
Cold radiators, spitting vents, banging or a leaking valve? Call (617) 691-5446 to be connected with an independent local heating company that works on steam radiators in Boston's older homes.
Service overview
What steam radiator repair involves
Cast-iron steam radiators are simple, but they only heat when air can get out and water can drain back. Most problems come from the air vent, the pitch of the radiator, or the valve. A cold radiator usually has a vent stuck shut. A spitting or hissing vent may be failing or the system pressure may be too high. Banging comes from water trapped in the radiator or its pipe. A leaking valve often just needs its packing replaced. In one-pipe steam, which is common in Boston, the supply valve has to be fully open or fully closed. This page covers steam radiators; for hot-water radiators and baseboards, see baseboard heating repair, and for the boiler, see boiler repair in Boston.
! Common warning signs
Radiator stays cold
A stuck air vent is the usual cause: air can't leave, so steam can't enter. A closed or half-open valve on a one-pipe radiator can also stop it heating.
Hissing or spitting vent
A little hiss as air leaves is normal. A vent that spits water or keeps hissing when hot is failing or flooded, and should be replaced.
Banging or a leaking valve
Banging usually means water is trapped because the radiator or its pipe is pitched the wrong way. A drip at the valve stem often just needs new packing.
Scope of work
What a radiator repair visit usually includes
A typical visit covers checking the radiators that act up, the vents and valves, and the pitch. Ask the company to price anything extra first.
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01
Vent check and replacement
Radiator vents are checked and replaced where they're stuck, spitting or the wrong size for the room.
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02
Pitch and shimming
On one-pipe steam, the radiator should tip slightly toward the valve so water drains back. Shimming the feet corrects the pitch.
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03
Valve repair
Leaking valve stems are repacked; seized or cracked valves are replaced. Valves on one-pipe radiators should be fully open or fully closed.
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04
Balancing the system
Ask whether the main vents and boiler pressure have been checked too, since uneven heat across the building often starts there.
Why fix it now
A cold radiator in an outside room can let pipes freeze, and a spitting vent can stain floors and ceilings.
Call nowTools used on steam radiators
Level
Checks the radiator and its pipe are pitched so water drains back to the boiler.
Radiator vent wrench
Used to remove and fit air vents without damaging the radiator tapping.
Low-pressure gauge
Shows whether the boiler pressure is too high, which can make vents spit and radiators heat unevenly.
Pipe wrenches and packing
Used to repack valve stems and replace valves on threaded pipe.
Local service
Cast-iron steam radiators are everywhere in Boston, from Back Bay brownstones to Dorchester triple-deckers, and many have been in place for a century. Most radiator problems are cheap to fix compared with the boiler itself. If every radiator in the building is struggling, the issue is more likely at the boiler; see steam boiler repair.
Steam radiator repair in Boston
- • Downtown Boston
- • Dorchester
- • Jamaica Plain
- • South Boston
Example jobs
Steam heat problems
If no radiators heat, call
If none of the radiators are heating, the problem is likely at the boiler. Call (617) 691-5446 to be connected with a local company that works on steam heat.
How steam radiator repair works
Call and describe
Tell the company how many radiators are acting up and what they're doing: cold, spitting, banging or leaking.
On-site check
The technician checks the vents, valves and pitch of those radiators, and the boiler pressure.
Repair and test
They quote the work, fix the cause, and run the heat to confirm. Ask for the quote in writing first.
What steam radiator repair costs in Boston
It depends on the fix. Replacing a vent or shimming a radiator is usually a small job; replacing a seized valve or moving a radiator costs more. We don't set prices; the company you're connected with quotes the work.
The fix
Vents and shimming cost less than valve replacement or piping changes.
Number of radiators
Fixing several radiators in one visit is usually more efficient than one at a time.
Time of the call
Scheduled visits usually cost less than after-hours calls.
Steam radiator questions, answered
Why is one steam radiator cold?
Usually its air vent is stuck shut, or its valve isn't fully open. On one-pipe steam the valve must be fully open to work.
Can I bleed a steam radiator?
Not like a hot-water radiator. Steam radiators have automatic air vents. If one is stuck, it usually needs replacing rather than bleeding.
Why does my radiator bang?
Water trapped in the radiator or its pipe gets hit by steam. Making sure the radiator pitches back toward the valve usually stops it.
Why is my radiator vent spitting water?
The vent may be failing, or the boiler pressure or water level may be too high. Have the vent and the boiler checked.