24 hour emergency service! Call 973-794-4636
Home » Blog » Why Is Your New Jersey Furnace Blowing Cold Air?

Why Is Your New Jersey Furnace Blowing Cold Air?

Heating and Furnace Maintenance in Morris County, NJThose cold New Jersey winter temperatures can really take their toll. And the last thing you want on a cold winter day is for your furnace to be blowing cold air!

Things can go wrong to cause your furnace to blow cold air – even if your furnace is fairly new. Sometimes you’ll be able to fix the problem all by yourself, but it’s important that you know when it’s time to call the professionals.

Here are some common reasons that your furnace is blowing cold air.

  1. Incorrect Thermostat Setting – This is especially common in offices or businesses where “thermostat wars” are a daily occurrence. If someone has accidentally changed the thermostat fan setting from “auto” to “on,” the fan will run continuously without providing any heat. So change the setting back to “auto,” and you’ll have heat again.
  2. Other Thermostat Issues – If you did a “do-it-yourself” thermostat installation recently, you might have chosen a thermostat that is not compatible with your heating system. If so, consult your HVAC professional for advice. If you’ve had the thermostat for a while, the battery might be low, so try changing the battery.
  3. Problem with Computerized Controls – Newer furnaces with electronic control panels may need to be reset. Try turning off the furnace using the power switch and wait a few minutes, then restart your furnace. (It’s just like rebooting your computer.) If this doesn’t solve the problem, call a professional.
  4. Empty Oil Tank – If your furnace runs on oil, you may be out of fuel.
  5. Overheated Furnace – If you haven’t changed your filters lately, the compromised airflow can cause your furnace to overheat, shutting down the burner. Try changing the air filter and restarting your furnace.
  6. Extinguished Pilot Light – If you have an older furnace with a continuous pilot light, it may have gone out.
  7. Valve Problem – If the pilot light won’t light you could have a faulty gas valve. Or if your system hasn’t been cleaned in a while the valve could be stuck due to dirt and debris. Have your system cleaned and checked by a professional.
  8. Faulty Thermocouple – If the pilot light keeps going out, you probably have a faulty thermocouple. This is a sensor that controls the gas valve and ignition.
  9. Clogged Oil Filter – If your furnace burns oil, the filter can become clogged with dirt and debris. Cleaning or replacing it is a dirty job, so you probably want to call a professional.
  10. Faulty Electronic Ignition – This problem requires a professional service call.
  11. Leaking Ducts – Hot air could be escaping through the ductwork, causing the system to blow cold air.
  12. Compromised Flame Sensor – If your furnace starts blowing warm and then quickly turns cold, you may have a problem with your flame sensor.

As you can see, there can be many causes to your furnace problems, but many of them can be prevented with regular cleaning and maintenance. If you haven’t had your system checked this year, schedule an appointment.

For furnace and heating repair, trust the specialists at Air 1 Heating and Cooling.

Contact us to learn more or to schedule an appointment. Air 1 Heating and Cooling is located in Whippany, NJ, serving residential and commercial customers in Morris, Essex, Union and Bergen Counties.

Written by Air 1 Heating and Cooling