Reasons Why Furnace Is Blowing Cold Air

It’s chilly out, and you’re standing next to your heat vents, expecting to feel that gentle warm breeze, but instead, your furnace is blowing cold air at you. What’s going on? There are six main reasons your furnace may be blowing cold air at you. We’ll explain them and help you troubleshoot them below. 

1. You Just Turned it On 

Your furnace is like a kettle, it needs time to heat up. If your furnace is blowing cold air after a filter change, or if this is the first time you’ve turned it on this year it will take some time to heat up and get the warm air circulating again. 

2. Your Thermostat Isn’t Set 

When you’re troubleshooting a furnace blowing cold air, your thermostat might be the last place you think to look. But, really, it should be the first. If your thermostat is set to cool instead of heat, or if the fan is on but the furnace is not set to heat, then the result is cold air blowing through your air ducts. If you have a complicated smart thermostat, you should check the manual to ensure you’ve set it right. 

3. Your Thermostat Signal Isn’t Being Received 

So your thermostat is set, but your furnace is not heating to the thermostat setting? It’s possible that the thermostat signal is not reaching the furnace. It could be that the contacts are loose or the wiring has broken. In either case, you’ll need a professional to pop in to take a look at the connections between the thermostat and the furnace. 

Are you looking to speak with an HVAC expert? Contact the team at Advantage Airtech ClimateCare today.  

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4. Your Furnace Over Heated 

If your furnace was previously working, but it stopped and is now blowing cold air, one likely problem is overheating. Furnaces may overheat for a variety of reasons, but when they do a safety mechanism is triggered and the heating elements shut down. When this happens, the furnace waits to cool completely and then it may be reset in order to start working again. 

While you can find guides online to reset a previously too hot furnace, you don’t want to do this. The original reason the furnace overheated will happen again. So, you need to have a professional repair the furnace first. They will also reset it when they are done. 

Remember that an overheating furnace can be a safety issue, so don’t try to tackle this one on your own. 

5. The Heating Element is Damaged 

It’s possible that the heating element in your furnace is damaged and no longer producing heat. Although damage is not the only reason the heating element may not work. It might also be due to a lack of power in the furnace. It’s possible a breaker flipped or a gas line is leaking. All of these problems require the attention of a professional. 

6. Ductwork Issues 

It is rare, but sometimes gaps in the ductwork can let the hot air escape before it reaches a certain room or spot in your home. Having these gaps repaired, will ensure that the hot air is being circulated efficiently and reaching all the areas in your home.  

Are you looking to get maintenance on your home heating system? Then you should contact the team at Advantage Airtech ClimateCare today. We’re here to help! 

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