
Rensselaer
Diagnosed a boiler tripping its manual-reset aquastat at a Rensselaer home: the relay aquastat was faulty, and on the return visit a new relay was installed and a burner plate that had not been screwed in was fixed.
Rensselaer · Booking Now
Heating repair in Rensselaer, NY for loud boilers, cold radiators and furnaces that lock out. Call (518) 482-4205.

Licensed & Insured
Family-Owned Since 2006
Same-Day Service
Heating repair in Rensselaer starts with a technician who listens to the symptom, checks the boiler or furnace and says what failed and whether it is worth fixing. The price comes in writing before any work begins. Rensselaer crews start at the US-20 shop in Nassau, NY (Rensselaer County). The company has served the Capital Region since 2006.
Water heaters and pipes are with plumber in Rensselaer, NY, air conditioning with AC in Rensselaer, and sewer laterals with Rensselaer drains and sewer. The Rensselaer overview shows every trade, and the heating overview explains each repair type. This page is for boilers, furnaces and gas conversions.
People often ask about gas conversions: if you heat with oil or propane and a gas main reaches your street, an oil-to-gas conversion is possible, and we confirm the main for your address before quoting. If it does not, a modern oil or propane unit is the like-for-like replacement, installed and sized for the house.

What we handle
Every service below links to the full page for that job. We keep one canonical page per service rather than a thin copy for each city, so you get the real detail.






From a quick repair to a full replacement, book online or call. We answer Monday through Friday and dispatch same-day across Rensselaer.
Representative work in the Rensselaer neighborhoods we serve.
Real homeowners
Verified Google reviews from Capital Region homeowners.

Plans & Financing
Join our maintenance plan for yearly tune-ups and big savings, or choose flexible financing that fits your budget with quick pre-qualification. Smart options that help protect your home, your time, and your wallet.
Best value
Regular care. Real savings. Total peace of mind.
Flexible payment plans to fit your budget.
Financed through Acorn Finance · Service Finance
Subject to credit approval. For qualified buyers.
Start with the symptom: noise, cold rooms or a system that has stopped.
Banging, hissing or a boiler that starts and stops constantly is a boiler repair call; do not keep resetting it.
Air in the loop, a weak circulator or a zone valve is the cause more often than a failed boiler; see heating system repair.
Where a gas main reaches the street, a conversion is possible; furnace repair and furnace replacement cover the forced-air side.
Questions we hear
Straight answers from the team that does the work. Still unsure? Call and a real dispatcher picks up.

Rensselaer boiler calls go to technicians who handle steam and hot-water systems alike, whatever the fuel. Describe the symptom when you call so the visit is planned around it. Call Monday to Friday, 7:30am to 6pm, or book online. Same-day service is offered within business hours when the schedule allows.
Steam boilers, hot-water boilers, forced-air furnaces and heat pumps can all be found in Rensselaer, sometimes in the same block. If you are unsure which you have, a photo of the basement equipment is enough to start.
Yes, all three. Combustion testing, venting and safety controls are done for the fuel you burn, not a generic checklist. Say which fuel you use when you book, and if you are weighing a switch we will explain what each option means for equipment and upkeep.
If a gas main serves your street, conversion is possible, and it means removing the tank and burner and installing gas equipment and venting. We verify the main for your address before pricing. The oil-to-gas note lists what to ask.
Noise and short cycling often come from sludge, a failing low-water cutoff, an oversized boiler or air in the system, and several of these are repairable. If the boiler is cracked, leaking at the block or repeatedly failing, replacement makes more sense. The replacement signs guide helps.
It depends on what you heat now, how much of the house a heat pump can serve, and whether you keep backup heat. Gas boilers and furnaces remain straightforward replacements. See heat pump versus furnace for the comparison, then ask us to scope both.
Trapped air is the usual first suspect, followed by a weak circulator, a stuck zone valve or a radiator valve that has failed. On a hot-water system, bleeding the upstairs radiators is a safe first step, and the cold radiator note explains how. If that does not help, book boiler repair.
Same-day service is offered within business hours when the schedule allows. We do not work nights or weekends, so the first available window follows the office opening at 7:30am on a weekday. Check the thermostat, breaker and fuel supply first, and tell dispatch what you find, because a boiler that is silent and one that is leaking are very different calls.
Look for a sight glass on the boiler: a water level that rises and falls usually means steam. Hot-water boilers have a pressure gauge and a closed loop of pipe to radiators or baseboard. One-pipe steam radiators have a single connection and a vent, while hot-water ones have two connections.
Equipment, fuel, venting and pipe or duct work all vary from house to house, so the quote is written after a visit. The high-efficiency heating upgrade guide covers the cost drivers. Acorn Finance can finance larger jobs.
Where we work
We dispatch to Rensselaer from our shop in Nassau on US-20. Real address, real phone, no fake storefront. Nassau is our licensed home base. Rensselaer is part of our service area, dispatched same-day across the surrounding Capital Region.

Rensselaer heating calls also take our crews to East Greenbush, Troy and Menands, to Schodack, and over the river to Albany.
Repairs, repipes, water heaters
AC repair, mini-splits, installs
Backups, laterals, camera inspection
City service-area hub