Getting Your Heating System Winter-Ready

Heating systems fail on the first truly cold night of the year, when every HVAC company in Bergen County has a two-day backlog. The point of a fall tune-up isn’t efficiency, though you’ll get some. It’s being the house that doesn’t need the emergency call.

Here’s what to do yourself, what to expect from a technician, and when to stop patching and start planning.

Know what you have

Bergen County homes run on a mix that’s unusual compared with most of the country:

• Gas forced-air furnaces (most common in post-war homes and anything renovated since)
• Gas or oil boilers feeding baseboard, radiators, or in-floor heat (very common in older Bergen homes; oil is still around in the northern and western towns)
• Heat pumps, increasingly common as primary heat in newer and renovated homes, and as mini-splits in additions
• Steam boilers with cast-iron radiators in pre-war houses

The service and warning signs differ, so find the label on your equipment first.

What you can do yourself

• Replace the filter on a forced-air system now, and every 1–3 months through the season. Write the date on the filter edge.
• Clear the area around the equipment. Three feet of clearance, nothing stored against it, nothing flammable nearby.
• Check the exhaust and intake pipes outside for high-efficiency furnaces (the white PVC pipes). Make sure they’re not blocked by leaves, nests, or, later, snow.
• Bleed hot-water radiators and baseboards if the top of a radiator stays cold while the bottom is hot. Small key, small bucket, a few minutes per radiator.
• Test the thermostat. Raise the setpoint and confirm the system starts within a few minutes. Replace thermostat batteries if it has them.
• Test every CO alarm. Any fuel-burning appliance can produce carbon monoxide if combustion or venting goes wrong, and the symptoms (headache, nausea, fatigue) are easy to mistake for a cold. A working CO alarm on every level is non-negotiable.

What a real tune-up includes

A tune-up that takes fifteen minutes isn’t a tune-up. For a gas furnace or boiler, expect the technician to:

• Inspect the heat exchanger (furnace) or the boiler sections for cracks or corrosion
• Check and clean the burners and ignition system, and verify flame characteristics
• Test combustion and measure CO in the flue
• Inspect the flue and venting for blockages, corrosion, or disconnection
• Check gas pressure and the condensate drain (high-efficiency units)
• Lubricate motors, check the blower or circulator pump, test safety controls and limit switches
• For boilers: check the expansion tank, pressure relief valve, and system pressure, and bleed air

For an oil system, add: replace the nozzle and oil filter, clean the combustion chamber, and run an efficiency test.

For a heat pump: clean or replace filters, clean the outdoor coil, check refrigerant charge and the defrost cycle, inspect the reversing valve, and verify the auxiliary/backup heat engages correctly. If your heat pump has electric strip backup, ask what outdoor temperature it’s set to switch over at; a wrong setting quietly doubles your winter electric bill.

Ask for the combustion test results in writing. A contractor who doesn’t measure CO and flue conditions isn’t doing the safety part of the job.

Warning signs that mean call now, not next month

• A CO alarm that goes off, ever, even once. Leave the house and call the gas utility’s emergency line or 911.
• A furnace that short-cycles (starts and stops every few minutes)
• A yellow or flickering burner flame on a gas appliance instead of steady blue
• Soot, scorch marks, or rust streaks around the equipment or flue
• Water pooling under a boiler, or a boiler pressure gauge reading much higher or lower than usual
• Rooms that used to heat fine and now don’t
• A heat pump that runs continuously and never seems to catch up once it’s below freezing

Repair or replace?

The rough rule from the Department of Energy and most contractors: if the system is past about 15 years for a furnace or heat pump, or 20–25 for a boiler, and the repair is a significant fraction of replacement cost, replacement usually wins. Efficiency gains are real but the bigger issue is reliability and parts availability.

Three Bergen County-specific things to know:

1. Oil to gas conversions are common here and often worth it if gas is on your street. Get quotes that include tank removal; abandoned or buried oil tanks are a well-known problem at resale in New Jersey.
2. Heat pumps now work in our climate. Cold-climate models maintain capacity well below freezing. Whether one makes sense depends on your electric rate, your existing ductwork, and whether you keep a backup; get a load calculation, not a rule of thumb.
3. Incentives change every year. New Jersey’s Clean Energy Program and the utilities (PSE&G and Rockland Electric in Bergen County) have offered rebates for high-efficiency equipment and heat pumps, and federal tax credits have applied to some installations. Check current programs before you sign, and make sure the contractor is participating if the rebate requires it.

Whatever you install, in New Jersey the work requires a licensed HVAC or plumbing contractor and, in most towns, a permit and inspection. A contractor who suggests skipping the permit is telling you something about how they’ll do the rest of the job.

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Reviewed October 2026. General homeowner information. Fuel-burning equipment and its venting should be inspected by a licensed professional; this guide doesn’t replace that.