Boilers are common in older Westchester homes
A boiler heats water, and either hot water or steam carries the heat to radiators or baseboard. Many homes built before and just after World War II were designed around boilers, and you will find them all over Harrison, Rye, Larchmont, Scarsdale, Bronxville and the older parts of White Plains and New Rochelle. Some still burn oil, some were converted to gas, and some now have a newer high-efficiency boiler in place of the original.
Steam and hot water systems behave differently, so tell us which you have if you know. Steam systems usually have a sight glass showing the water level on the boiler, and radiators with a single pipe and a small air vent. Hot water systems have a pressure gauge, a circulator pump and often an expansion tank.
Signs your boiler needs a repair
- Some or all radiators stay cold
- Banging or knocking pipes, especially on steam systems
- Water on the floor around the boiler
- The pressure gauge reads unusually high or low on a hot water system
- The boiler runs constantly or will not fire
- The relief valve is dripping or discharging
What usually goes wrong
On hot water systems, circulator pumps, expansion tanks, zone valves and the controls are frequent repairs. On steam systems, problems often come from low water, clogged vents or pipes that have lost their pitch. Oil-fired boilers need regular burner cleaning and filter changes, and many technicians recommend a yearly service. Any work on the burner, gas or oil supply, or the boiler's safety controls should be done by a trained technician.
Boilers often last longer than furnaces, but once one passes about 15 years, a big repair deserves a second look. Angi notes that boilers typically last 15 to 20 years, and replacement often costs about $3,700 to $8,300.
Thinking about a change
Homes with radiators and no ducts can be a good fit for ductless mini-splits, either to add cooling or to take on part of the heating. Some homeowners keep the boiler for the coldest days and let a heat pump carry the milder ones. Ask the contractor about options before you replace an older boiler like for like.
Safety
If you smell gas, smell fuel oil strongly in the house or your CO alarm sounds, leave and call 911 or your gas utility from outside. Do not try to relight a boiler, bleed a steam system or adjust safety controls yourself if you are unsure. Send a request and let a technician handle it. Use the estimate form, choose boiler repair and tell us if the system is steam or hot water.
Typical boiler repair costs
Published national ranges. Not quotes.
| Job | Typical range |
|---|---|
| Boiler repair, most jobs | about $150 to $750 |
| Circulator pump | about $300 to $1,100 |
| Expansion tank | about $200 to $800 |
| Boiler replacement | about $3,700 to $8,300 |
Ranges are national averages from the sources below, rounded, and are not quotes. Your price depends on the boiler type, fuel, the part and access.
Sources: Fixr, boiler repair; Angi, boiler repair; Angi, boiler replacement
Questions homeowners ask
How much does boiler repair cost?
Fixr puts most boiler repairs at about $150 to $750, with a national average near $450. Angi reports a similar typical range of about $190 to $660. Parts like a circulator pump cost more.
Why are some radiators cold?
On hot water systems, trapped air, a failing circulator or a stuck zone valve are common causes. On steam systems, a clogged radiator vent or poorly pitched pipe is often to blame. A technician can find the cause quickly.
Should I replace my old oil boiler?
If it is past about 15 years old and needs a major repair, it is worth pricing replacement. Ask the contractor to quote a repair, a new boiler and, if it fits your home, a heat pump option.
Other services
Furnace repair
Gas, oil and propane furnaces that will not start, short cycle or blow cold air.
Furnace replacement and installation
New gas, oil or electric furnaces, including oil to gas conversions.
No-heat requests
House cold and the heat will not come on? Mark your request as no heat.
Heat pump installation
Cold-climate heat pumps to replace or work alongside a furnace or boiler.
Ductless mini-splits
Heating and cooling for homes with radiators, additions and finished attics.
Air conditioning repair
Central air that runs but will not cool, leaks or will not start.
Where we take boiler repair requests
- Furnace repair in Harrison
- Furnace repair in West Harrison
- Furnace repair in Purchase
- Furnace repair in Rye
- Furnace repair in Rye Brook
- Furnace repair in Port Chester
- Furnace repair in Mamaroneck
- Furnace repair in Larchmont
- Furnace repair in White Plains
- Furnace repair in North White Plains
- Furnace repair in Scarsdale
- Furnace repair in Hartsdale
- Furnace repair in Valhalla
- Furnace repair in Armonk
- Furnace repair in New Rochelle
- Furnace repair in Eastchester
- Furnace repair in Elmsford
- Furnace repair in Tuckahoe
- Furnace repair in Bronxville
- Furnace repair in Pelham
- Furnace repair in Ardsley
- Furnace repair in Hawthorne