The first cold night in North Jersey always brings the same calls: the heat clicks but never lights, the blower runs cold air, or there's a burning smell nobody can place. Most of those calls are avoidable. A furnace that gets checked in early fall almost always starts cleanly when you need it, and small problems get fixed on your schedule instead of at 2 AM.
Test your heat this week (15 minutes)
Before you book anything, run this quick check yourself:
- Change or check the air filter. A clogged filter is the most common reason a furnace overheats and shuts itself off.
- Set the thermostat 5 degrees above room temperature and listen. You should hear the inducer fan, then ignition, then the burners, then the blower within a few minutes.
- Let it run 15 minutes. A light burning-dust smell for the first few minutes is normal after a summer off. It should fade.
- Walk the house. Warm air should come out of every supply register.
If it clicks over and over without lighting, lights and then shuts off, makes a new rattling or banging noise, or the smell doesn't fade, stop there and call a technician.
The 6 things a real furnace tune-up covers
- Heat exchanger: inspected for cracks and corrosion. This is the part that keeps combustion gases separate from the air you breathe, so it's the most important safety check on the list.
- Burners and ignition: cleaned and checked for an even, steady flame and a clean, reliable start.
- Flame sensor: cleaned. A dirty sensor is one of the most common reasons a furnace lights for a few seconds and then shuts off.
- Flue and venting: checked for blockages, loose joints and proper draft, so exhaust leaves the house the way it should.
- Blower motor: checked for airflow, noise and electrical health, so it doesn't fail in the middle of January.
- Air filter: checked or replaced, plus a look at the thermostat and electrical connections.
Signs you shouldn't wait for a tune-up
- Your carbon monoxide detector goes off, or anyone in the house gets headaches that ease when they step outside. Get everyone out and call 911 or your gas utility first.
- You smell gas (rotten eggs). Leave the house and call your gas utility from outside.
- The burner flame looks yellow or flickers wildly instead of a steady blue.
- The furnace short-cycles, turning on and off every few minutes.
- Heating bills jump with no change in how you use the heat.
Boilers and oil systems need it too
A lot of older homes in Paterson, Haledon and Clifton heat with boilers or oil. Those systems need yearly service too: pressure, expansion tank, circulator pump, and, on oil, the nozzle and filter. If you're tired of oil deliveries, fall is also a good time to ask about an oil-to-gas conversion. See our boiler and heating service page for more.
How to make it automatic
The easiest way to never skip a tune-up is our Rescue Club at $19 a month. If something does break, we're available 24/7 across North Jersey, our techs are NATE-certified, and every job comes with a 1-year parts and labor warranty. Learn more about our furnace repair and service, or read how often HVAC systems really need service.
- When is the best time for a furnace tune-up in New Jersey?
- Early fall, September through October, before you need heat every day. You get easier scheduling and any repairs happen before the first cold snap instead of during it.
- How often should a furnace be serviced?
- Once a year for most homes. Older systems, and homes with pets or heavy use, benefit from having the filter checked more often between visits.
- Is a burning smell normal when I first turn on the heat?
- A light dusty smell for the first few minutes after summer is normal. If it lasts more than about 15 minutes, smells electrical, or smells like gas, turn the system off and call for service.
- Do you service furnaces in my town?
- We serve Bergen, Passaic, Morris, Essex, Hudson and Union counties, including Haledon, Wayne, Paterson, Clifton and the surrounding towns. Call (866) 737-2830 to confirm your address.