In some parts of the country, like Arvada, it gets very cold come the wintertime and you rely on your furnace to keep your home nice and warm. So when you fire it up and it’s blowing cold air around your home, you start to panic. But you shouldn’t. This doesn’t necessarily mean that you need a new furnace at the most inconvenient time of the year. There are some very simple possible explanations, like a lack of furnace and air duct cleaning, that we’re going to talk through in this article.
As we just mentioned, don’t start panicking just yet, as often a furnace blowing cold air can be quite simple to fix. Here are some of the more common reasons that it can happen.
Have you come to this page after turning on your furnace for the first time this season? If so, your issue might just be a lack of patience. Your HVAC system will take a few minutes usually to kick into gear and start producing the hot air that will warm your bones. If 15 minutes pass and the air that is being blown out of the vents is still cold, then you can start to think something might be wrong and look at other possible explanations in this article.
We’ve seen clients in Arvada make this mistake and then feel rather silly when we’ve come to troubleshoot the issue. We’d always advise that you have it on the “auto” setting. Some people have it simply set to “on” But if you do that, air will be circulated around your ducts even if the furnace is not firing. And that air will be cold…
Set it to auto and air will only be blown around the house when the furnace is on too.
Some homeowners make the mistake of thinking that their air filters last forever, or at least a lot longer than they actually do.
Over time, your filter will become dirty and clogged. This makes it much harder for air to pass through it. If it gets to this stage, it can cause the heat exchanger to overheat. All furnaces have a safety mechanism in place whereby if this overheating is detected, a “high limit switch” is triggered and the burners will cut out. This is to protect the heat exchanger, as at very high temperatures it can crack. And you don’t want that, as it’s expensive to replace.
A professional furnace cleaning company will check on the filter as part of their service, but as the homeowner, you should also be checking it periodically.
That same “high limit switch” may be triggered for reasons other than a clogged air filter. Here are some other common issues that could be causing your furnace to overheat.
This obviously only applies if you have a gas furnace. If so, it could be that there’s an issue with the gas valve and no gas is getting through to be burnt to produce the heat you desire. Sometimes this could be due to a faulty valve, in which case it needs replacing. But other times it can be due to a build-up of dirt inside this valve, which prevents it from working correctly. In this case, a call to a furnace cleaning company is what you need.
It’s possible that your furnace is blowing hot air, but it feels like it’s not because all of that hot air is escaping before it actually gets to you. How is that so? Well, if your air ducts are full of holes or cracks, or your air vents are blocked up, the hot air will be lost. This is why it’s so useful to have an annual air duct cleaning arranged, as these issues will usually be picked up and you can make the necessary arrangements, rather than having to try and “figure it out” once winter has already arrived.
It’s not a good idea to wait until winter to see if everything is fine with your furnace. An annual furnace cleaning can help you to get ahead of any potential issues well in advance. If you’ll like us to give your system the once over, call our service team today at (720) 419-7792.