Furnace will not start or stay lit
Failed ignitors, dirty flame sensors and safety switches doing their job are the usual no-heat causes. We test the ignition sequence in order and replace only what has actually failed.
HVAC Contractor — Union County, New Jersey
Furnace Repair in Union County, New Jersey
Need furnace repair you can trust? Get Air Hero handles no-heat calls, short cycling and strange furnace noises found and fixed for homeowners across Union County and northern New Jersey, with a proper diagnostic and a written price before work starts.
- Free written estimates on new systems
- Repairs priced in writing before work starts
- Serving Union County and northern New Jersey
What our furnace repair covers
Short cycling and uneven heat
A furnace that starts and stops every few minutes wears itself out and leaves rooms cold. Airflow restrictions, oversized equipment and failing controls all cause it, and each has a different fix.
Blower and noise problems
Squealing, rattling or a blower that never stops points at motors, bearings or control boards. We isolate the noise to the part before quoting anything.
How furnace repair works with us
- Tell us what the furnace does when the thermostat calls for heat, and whether the problem is constant or comes and goes.
- We run the full start-up sequence under test, ignition, flame, blower and safeties, and show you where it breaks down.
- You approve a written repair price before parts are fitted.
- We repair, run the furnace through complete cycles and check carbon monoxide safety before leaving.
What furnace repair costs in New Jersey
Most furnace repairs in Union County, ignitors, flame sensors, pressure switches and blower work, land roughly between $150 and $900. Heat exchanger and full control board jobs run higher, and a cracked heat exchanger is a safety conversation about replacement, not a repair quote. Every price is written before work starts. Guidance ranges checked November 2026.
Get an Honest QuoteQuestions callers ask about furnace repair
How fast can you come out?
Call as early in the day as you can. No-heat and no-cooling emergencies are placed first, and we give you a straight arrival window on the call, not a vague promise.
Do you charge for the visit?
Estimates on new systems are free. For repairs, any diagnostic charge is explained on the call before anyone is dispatched, and the repair itself is priced in writing before it starts, so there are no surprises.
What should I do before you arrive?
Check the thermostat is set right and the filter is not clogged solid, both save real visits. If you smell burning, hear loud electrical buzzing or your CO alarm sounds, switch the system off and call us from a safe spot.
My furnace keeps shutting off after a few minutes. What causes that?
Short cycling usually comes from a dirty flame sensor, restricted airflow from a clogged filter or blocked returns, or a safety limit switch tripping on overheating. The first two are inexpensive, the third needs a proper airflow fix, which is why we test the whole sequence instead of swapping parts blind.