HVAC Questions: Why Is My Furnace Blowing Cold Air? - Corley Plumbing Air Electric
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HVAC Questions: Why Is My Furnace Blowing Cold Air?
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HVAC Questions: Why Is My Furnace Blowing Cold Air?

December, 3rd, 2014

As we are moving into the cold season in the Upstate, it’s important that your furnace is working properly. You expect your HVAC system to keep you warm and healthy during the winter months and it can be a serious cause for concern when you turn it on and it blows cold air. Don’t be alarmed, there are a number of possible reasons that your furnace is blowing cold air. Here are the top 7 reasons:

  1. Give it a minute. All of the air in your ducts is cold and needs to be pumped out before the warm air will begin to emerge. This is the same principle as when you turn on the hot water and wait for it to “get hot.”
  2. Your air filter is dirty and your furnace overheated. If your furnace overheats, it will shut itself off as a safety precaution. The most common solution is just to change the air filter. When the air filter is too dirty, it can block airflow and cause the furnace to overheat.
  3. The pilot light is out. Some older furnace models have a pilot light that can go out, making it impossible for the furnace to heat the air. Look in your furnace manual and find directions on how to relight the pilot. If you need assistance, please feel free to contact us.
  4. Switch your setting to “auto.” When you have it in the “on” position, it will keep blowing air through the vents, even when the furnace isn’t running. By switching it to “auto” you can be sure that the fan will only blow when the furnace is running.
  5. Your flame sensor is dirty or broken. When you turn your furnace on and it starts to blow warm air but it quickly turns off, your flame sensor may need to be cleaned or replaced. We can help with that.
  6. Your thermostat might be broken. It simply may be that your thermostat isn’t sending the right information to the furnace and needs to be fixed or have batteries replaced.
  7. There is a serious problem. If the above answers don’t solve your problem, you may have a more serious problem and will need a service call. That’s where Corley can help. By handling the furnace correctly the first time, you can save time and money in the long run.

If you live in Greenville, Spartanburg or the surrounding Upstate SC area and your HVAC system or furnace needs service, please contact us. We’d be happy to help answer any of your questions and make sure that you get the right service you need.