Utica, NY and nearby towns
Radiator repair in Utica, NY
Cold radiators, leaking valves or a radiator that hisses and spits. Call to reach a local company that works on cast iron radiators and the boilers behind them.
This is a referral line. When you call, you are connected with an independent local heating company.
Common radiator problems
- Cold at the top on hot water: trapped air. Bleed it.
- Cold on steam: a stuck air vent, or the radiator tilted the wrong way.
- Leaking valve: packing or valve replacement. Angi lists a radiator valve at $180 to $330.[source]
- Hissing or spitting on steam: a failing vent.
Is it the radiator or the boiler?
If one radiator is cold, the problem is usually local. If many are cold, look at the boiler. See no heat and steam boiler repair.
Steam radiators and hot water radiators look alike
Cast iron radiators in Utica homes can be steam or hot water, and they look similar. A steam radiator usually has one pipe at the bottom and an air vent on the side near the top, on the end opposite the supply valve. A hot water radiator has two pipes, one at each end or both at the bottom, and a small bleed valve near the top instead of a vent that sticks out.
Knowing which you have changes everything. A steam vent should never be swapped for a bleed screw, and bleeding a steam radiator like a hot water one will not work.
Steam radiator vents
On a one pipe steam system, the air vent on each radiator lets air escape as steam fills the radiator, then closes when steam reaches it. A vent that sticks closed leaves the radiator cold. A vent that sticks open hisses steam and may spit water. Vents come in different sizes that control how fast each radiator heats, which is how steam systems are balanced.
Replacing a radiator vent is a simple part swap on many systems, but choosing the right size matters. A technician who works on steam can rebalance a house by changing vent sizes so the far rooms heat as fast as the near ones.
Radiator pitch and banging
One pipe steam radiators need to pitch slightly back toward the supply valve so condensate can drain. Old floors settle, and a radiator that has tilted the other way traps water, which bangs when steam hits it. Shims under the feet on the far end can fix it. Check with a level.
The supply valve on a one pipe steam radiator must be fully open or fully closed. A half open valve traps water. If you want less heat from a steam radiator, a smaller vent is the right tool, not the valve.
Leaks at radiators
Radiators leak at the valve packing, at the union where the valve meets the radiator, or between sections. A drip at the valve stem can often be fixed by tightening or repacking. A leak between sections or a cracked section is a bigger repair, sometimes requiring the radiator to be taken out.
Cast iron radiators are heavy. Moving one safely takes two or more people and the right equipment, and the system has to be drained or valved off first.
Radiators and old houses
Census estimates put about half of Utica's homes, and well over half in Clinton, Frankfort, Ilion and Mohawk, as built before 1940.[source][source][source][source][source] Those are the houses most likely to still have cast iron radiators. Many owners keep them for their even, steady heat and repair them rather than replacing the system.
If you are replacing a boiler, keep the radiators in mind. Large cast iron radiators hold a lot of water and give off heat at lower water temperatures, which can help a new condensing boiler run efficiently on a hot water system.
Covers, painting and heat output
Radiator covers and heavy paint both reduce heat output. Metallic paint, in particular, reduces how much heat a radiator gives off. If a room never gets warm and the radiator is enclosed in a cabinet or covered in layers of paint, that may be part of the problem.
Furniture and curtains in front of a radiator do the same thing. Leave space around it so air can move.
Radiator problems by symptom
- Cold at the top, warm at the bottom (hot water): air in the radiator. Bleed it.
- Completely cold (steam): stuck vent or closed valve.
- Hissing constantly (steam): vent stuck open.
- Water spitting from the vent (steam): radiator tilted wrong, or boiler water level too high.
- Drip at the valve: worn packing or loose union.
- Whole floor cold (hot water): low pressure or zone problem.
Frequently asked
Can I remove a radiator myself? It is heavy, the system must be drained or valved off, and old fittings can break. Most owners hire it out.Should radiators be painted? Paint is fine, but thick layers and metallic paint reduce heat output.Adding or moving radiators
Renovations sometimes move radiators or add new ones. On steam, any change has to respect pipe pitch and the boiler's capacity. On hot water, new radiators or baseboard change the system balance. Have a heating company plan it rather than moving a radiator during a remodel without them.
Removing radiators without adjusting the system can also cause problems, especially on steam, where the boiler was sized for all of them.
Covers and furniture
Radiator covers and furniture pushed against radiators block heat. Metal covers with open grilles work better than solid wood boxes. Keep curtains from hanging over radiators so warm air can rise into the room.
Leaking radiator valves
An old radiator valve may weep around the stem. Packing can sometimes be replaced without draining the system.
Cold radiator checklist
Check that the valve is open, the radiator is pitched correctly (steam), and the vent or bleeder is not clogged. Note which rooms are cold.
What to have ready when you call
- Your address, so the company can tell you if you are in their area.
- Boiler type and fuel if you know it: steam or hot water, gas or oil. A sight glass with water in it usually means steam.
- What it is doing, plus any code on the display or the reading on the pressure or temperature gauge.
Not sure about any of it? Call anyway. The company will ask the right questions.
Common questions
Can old radiators be moved or removed?
Yes, but it changes how the system is balanced. Ask the company.
Should I paint my radiator?
Never paint over steam air vents. They need to breathe.
Talk to a local boiler pro
Call now and get connected with an independent heating company that serves the Utica area.
Call about your boiler(888) 835-0429