Why Is My Furnace Blowing Cold Air?

It can be an inconvenience if your furnace is blowing cold air. Not only will you be uncomfortable, but you could also end up with a higher energy bill.

The furnace is the primary heat source in many homes and is usually powered by gas or electricity. Regular servicing and maintenance will help keep it running efficiently.

Read more: What Is The Ideal Schedule For Servicing A Furnace?

There are several possible reasons why a furnace may be blowing cold air. We will discuss the most common reasons below.

1) The Thermostat Is Not Set Up Correctly

The thermostat is responsible for controlling the temperature of your home. If it is not set at the right temperature, the furnace will not turn on or will only blow cold air. Make sure that your thermostat is set to the right temperature and that it is in heating mode.

2) The Pilot Light Is Out

Many furnaces rely on a pilot light to ignite the heat that’s then blown into your home. If the pilot light has gone out, your furnace won't be able to create the heat it needs and will instead blow cold air. To fix this issue, you should look for instructions on relighting your pilot light in the owner’s manual or online.

3) The Ductwork Is Faulty

When cold air is coming from the furnace, it could be because it's leaking out through holes in your ductwork. Ensure that your vents and registers are correctly sealed to prevent heat from escaping. If you can feel cool air coming from certain areas in your home, it may be time to get them inspected or repaired.

4) The Condensate Line Is Clogged

The condensate line may be blocked if your furnace is blowing cold air. This can occur when water builds up in the line, preventing proper drainage and blocking heat flow from your furnace to your home. You should have a professional inspect and clean out your condensate line to get it back into working order.

5) The Air Filters are Blocked

The air filters work for the furnace, and when they are blocked, the furnace will need to be able to provide enough heat. The filters must be cleaned and changed regularly to keep the air flowing efficiently. Check the air filter to see if it needs to be cleaned or replaced. If you have to replace your air filter, select one compatible with your furnace with a high MERV rating.

6) Old Age and Wear and Tear

As your furnace ages, parts and components may wear out or become less efficient at their job. This can decrease heat production, leading to cold air being blown from the vents. Wear and tear can also cause clogs or blockages in the system, causing it to blow cool air and not warm air. If your furnace is over ten years old, it may be time for a replacement.

The last thing you want is a chilly home when the weather gets cold and your furnace isn't providing heat. Contact Moncrief for the best heating and air repair in Atlanta. Our team is available 24/7 for all your HVAC needs. We provide quality service and use top-of-the-line parts to keep your furnace working again.