Furnace and Boiler Startup Checklist for Buffalo Homeowners

A heating safety guide from Matt Schultz, Owner, TRS Heating & Air Conditioning

Your heat’s been off since spring, and in a few weeks or so you’re going to ask it to run around the clock. The first startup of the season is exactly when small problems show themselves, which is good news if you’re standing there watching, and bad news if the first time you find out is on a 15 degree night in January.

September 8, 2026

Boiler, Furnace, or Heat Pump? Know What’s Heating Your Home

Buffalo and surrounding Western New York homes run on a mix of systems, and what you check depends on which one you’ve got.

If your rooms have radiators or baseboard units, you have a boiler. It heats water and moves it through pipes. Older homes across Buffalo, Kenmore, Lackawanna, West Seneca, and the East Side are full of them, and plenty of those cast iron units have been working since before anyone reading this was born. They give steady, even heat, but they have water, pressure, and air in the system to think about.

If warm air blows out of floor, wall, or ceiling vents, you have a furnace. It heats air and pushes it through ductwork. More common in newer builds and the suburbs. Furnaces bring a house up to temperature fast, but they depend on a clean filter, clear ducts, and a healthy blower to do it.

If you have wall-mounted indoor units and no ducts, you’re on a heat pump or mini split. It is important to keep your filter clean on the wall unit and to keep your outdoor heat pump free of leaves and bushes. In addition, it is also very important to clean your coils and your hose can help do the trick. More of these go in around here every year, and they’ve been running all summer as your air conditioning, so they need a different check list for maintenance. Give us a call, and we’ll get you scheduled.

Either way, boilers and furnaces share one quirk that heat pumps don’t: they sit completely off for four or five months. Seals dry out. Sediment settles. Filters pack with dust. Pressure drifts. And none of it shows up until you turn the system back on and ask it to work.

Before You Touch Anything: If You Smell Gas, Get Out

A faint burning-dust smell in the first few minutes of the season is normal. That’s dust cooking off components that have been sitting idle since spring, and it should clear within the hour.

A rotten egg or sulfur smell is not normal. If you smell that:

• Leave the house.
• Don’t flip any switch, don’t touch the thermostat, don’t use a phone inside, don’t light anything.
• From outside, call your gas utility’s emergency line. In most of Western New York, that’s National Fuel at 1-800-444-3130, 24 hours a day. If you’re unsure who your gas provider is, call 911.
• Call TRS after the gas company has cleared the house. We’ll find out why it happened and fix it.

The gas company comes free and comes fast. We’re the second call, not the first.

Your Pre-Startup Boiler Checklist

First, figure out whether you have hot water or steam. This matters more than most homeowners realize, and it changes the pressure numbers completely.

Look at a radiator. Two pipes running to it, or a baseboard unit, means hot water. One single pipe with a small silver or brass air vent on the side of the radiator means steam. Steam boilers are still out there in a lot of the older housing stock in the city, and they’re a genuinely different animal.

If you have a hot water boiler:

• Check the pressure gauge: It should read roughly 12 to 15 PSI when the system is cold. Reading low means the system may need water added. Reading unusually high means stop and call a professional rather than adjusting it yourself.
• Bleed your radiators: If any of them felt cool at the top and warm at the bottom last winter, or gurgled, there’s air trapped in the system. Open the small valve near the top of each one until water comes out instead of air, then close it. Start with the radiators farthest from the boiler and work back.
• Look at the floor. Any water pooling, staining, or rust streaking around the base of the boiler is worth a service call now rather than in December.

If you have a steam boiler:

• Do not go by the 12 to 15 PSI rule: Residential steam systems typically run under 2 PSI. If yours is reading in the low single digits, that’s likely correct. Adding water to “fix” a low reading can flood the system and cause real damage.
• Check the sight glass: On the side of the boiler. The water level should sit around the middle. Cloudy or dark water, or a level you can’t see at all, means call us before you fire it.
• Listen for water hammer: Banging in the pipes on a steam system usually means condensate isn’t draining back properly, often from pitch problems in the piping or a stuck vent. It’s fixable, and it gets worse if you run all winter with it.

Both types:

• Verify the pilot light or ignition: Older units with a standing pilot should hold a steady blue flame. Newer electronic ignition should fire cleanly on the first try, with no repeated attempts and no error codes on the board.
• Listen through the first full cycle: Humming is fine. Banging, clanking, rhythmic knocking, or persistent hissing are not, and none of them fix themselves.

Your Pre-Startup Furnace Checklist

Furnace owners, your list looks a little different, but it’s just as important:

• Replace the filter: A filter that sat all summer is often the single biggest reason a furnace struggles on day one. A clogged filter chokes airflow, makes the furnace run longer to heat the same space, and can even trip the system’s safety shutoff. Start the season with a fresh one, and plan to check it every one to three months all winter. Click here to order your filters, and we will ship them directly to your door. 
• Open and clear your vents: Walk the house and make sure supply and return vents aren’t blocked by furniture, rugs, or the boxes that migrated over the summer. Closed or blocked vents force the system to work harder and heat unevenly.
• Test the thermostat: Switch it to heat, set it a few degrees above room temperature, and confirm the furnace kicks on within a minute or so. If it doesn’t respond, check the batteries and breaker before assuming the worst.
• Watch and listen to the first startup: The burner flame should be steady and blue, and the blower should come up to speed without screeching, rattling, or repeated on-off cycling. Short-cycling, where the furnace fires up and shuts down every few minutes, is a warning sign, not a quirk.
• Do the smell check here too: Just like a boiler, a brief burning-dust smell at first startup is normal and should fade within the hour. A persistent gas smell, or anything electrical or metallic, is not. Shut the system down and call TRS.

Test Your Carbon Monoxide Detectors. Both Systems.

This applies whether you have a furnace or a boiler. Any gas-fired appliance can produce carbon monoxide if something goes wrong with combustion or venting. On a furnace, a cracked heat exchanger puts CO into the air your ducts then distribute through the whole house. On a boiler, the usual culprit is a blocked or deteriorating flue, and Buffalo has no shortage of century-old chimneys doing work they weren’t designed for.

New York requires carbon monoxide alarms in nearly all homes under Amanda’s Law, which has been in effect since 2010. If you can’t remember the last time you pressed the test button, do it now. If you can’t remember the last time you replaced the unit itself, check the manufacture date on the back. CO detectors expire, usually between five and ten years, and an expired one gives you nothing but a false sense of security.

If a CO alarm goes off, treat it exactly like a gas smell. Get everyone outside and call 911 from there.

Already Flipped It On and Nothing Happened?

Four things to check before you call anybody, because one of them fixes it more often than you’d think.

• The breaker: Gas furnaces and boilers still need electricity for ignition, controls, blowers, and circulator pumps. Check the panel.
• The service switch: There’s a switch on or near the unit that looks exactly like an ordinary light switch, because that’s what it is. Installers put it there so techs can kill power safely. Homeowners flip it by accident constantly, usually while carrying something down the basement stairs. Check that it’s on.
• The filter: If it’s completely packed, the safety limit switch may be preventing startup on purpose.
• The gas: If your stove and water heater are working, gas is coming into the house, and the problem is at the unit. If nothing gas-fired works, call National Fuel.

If all four check out, it’s a service call. We run 24/7 emergency service, call us at 716-825-9911.

When to Call a Professional

Bleeding a radiator, swapping a furnace filter, or checking a pressure gauge is well within most homeowners’ comfort zone. These situations are not:

• A gas smell that doesn’t clear quickly (boiler or furnace)
• A system that won’t ignite after a couple of normal attempts
• Water pooling near the base of a boiler
• Boiler pressure that keeps dropping even after adding water
• A furnace that short-cycles, blows lukewarm air, or trips your CO detector
• Noises that get louder or more frequent over several days

Caught early, these usually aren’t extensive problems. Left running unchecked, they can become expensive or unsafe. Even manufacturers recommend this approach: Rheem’s winter prep guide pairs a homeowner pre-inspection checklist with a professional inspection before the cold sets in.

Get Ahead of the Cold, Call TRS Today

The best time to find out your heating system needs attention is while you still have weeks before you need it. Not on the first genuinely cold night, when you’re without heat, and every other house in Western New York is calling for the same reason.

Get on our schedule for your Health & Safety Check Up. This covers what you can’t check yourself: combustion readings, heat exchanger inspection, draft and flue check, safety controls, and the electrical side of the unit. It’s the same visit that catches a cracked heat exchanger before it becomes a carbon monoxide problem.

We service furnaces, boilers, heat pumps, and mini-splits across Buffalo, West Seneca, Hamburg, Amherst, Cheektowaga, Orchard Park, Lockport, Niagara Falls, and the rest of Western New York, east to Rochester.

Don’t Stress, Call TRS. Schedule your Furnace Health and Safety Check Up today at 716-825-9911 ext. 112. 

FAQ

How often should a boiler or furnace be serviced? Once a year, ideally in late summer or early fall before you need it running daily. Annual tune-ups catch small problems early and keep either system running all winter efficiently.

Why are my radiators hot at the bottom but cold at the top? That’s trapped air, common after a boiler sits off all summer. Bleeding each radiator with the small valve near the top usually solves it. If they need bleeding every few weeks, call a professional.

How often should I change my furnace filter? Every one to three months during heating season. Homes with pets, smokers, or lots of dust land on the shorter end. A dirty filter is the most common and cheapest-to-fix cause of weak heat and high gas bills.

Why does my furnace keep turning on and off? Short-cycling usually points to a clogged filter, a thermostat issue, or an overheating furnace shutting itself down for safety. Start with a fresh filter; if the cycling continues, have a professional look before it turns into a no-heat call in January.

Is it normal for my heating system to make noise when it starts up? Gentle humming is normal for both systems. Banging or clanking from a boiler usually points to sediment buildup or circulation problems. Screeching or rattling from a furnace often means blower or motor trouble. Either way, these are far cheaper to fix early than after a January breakdown. If you’re hearing them at startup, call TRS now before the cold settles in at 716-825-9911 ext. 112.

Resources

• Boiler Repair and Installation
• Heating System Services For WNY
• Reliable Heat Pump Service
• Rheem Winter Prep Guide
• TRS Furnace Tune-Up