A dirty air filter hinder air movement through the furnace. It’s Just Been Switched On – Any furnace will blow cold air when it starts up, since it takes time for hot air to travel through the system and into your home. You can go ahead and change the air filter yourself. If you cannot find a pilot light, then an electric heating element is probably what ignites your furnace. If your furnace is blowing cold air, there are chances that someone has adjusted fan settings from ‘Auto’ to “On’. Pilot Light. Related: Heat Pump vs. Air Conditioner and Gas Furnace, Which is Better? If your furnace overheats, it could end up blowing cold air. It has a clean air filter in it also. Furnaces can be dangerous if not serviced properly. Getting home to a cold house and having a furnace that blows cold air is a headache. #3 – The Furnace Has Overheated. 10 Common Reasons Why Your Furnace is Blowing Cold Air Furnaces / By Smile HVAC When the furnace is turned on after a certain period, whether it be days, weeks or months, turning on the system does not mean that warm air will automatically begin to pass through the vents. I turn thermostat onto the "heat" position and set temperature at a higher temp than room temperature. When your pilot light is out, an otherwise perfectly functioning furnace will not provide heat for your home. I then switch thermostat back to "heat" and unit shuts off as if the set room temperature has been reached although it hasn't. In this article we try to help you with the issues caused by cold air blowing from an electric furnace, do you need heating repair? Is The Thermostat Set To Auto or On? 2. Details. In such cases, a safety control device known as the limit switch will shut off the burners. The furnace blowing cold air, or there is no heat in the house. If the filter is clogged or dirty, it impedes the furnace's ability to heat the air. I have an American Standard furnace that is just blowing cold air but no heat. A/C & Refrigeration offers HVAC Repair to Phoenix Valley homes and businesses. I have an electric furnace that blow cold air sometimes. According to the chart on the panel this indicates a stuck limit switch. There are, incidentally, some common causes for why your furnace may be blowing cold air instead of warm, and what you can do to fix the problem. Schedule furnace repair today . AC works properly with a clean filter. If your electric furnace is blowing cold air, it has power, but there may be something else that is preventing it from operating properly. Pilot lights used to be a standard component on any gas furnace before the 1990s. If your heater starts by throwing warm air out of your registers, but you are soon left with a heater blowing cold air, then I would suspect that your flame sensor needs to be cleaned. The “on” setting means that the furnace fan will be running even when the furnace itself is off. In many cases, the solution is much simpler than you may realize. There are a few things to check in your home in the case that your furnace is blowing cold air, such as your thermostat settings, air filter, and your home’s ductwork. Furnace Still Blowing Cold Air? The fuel system, the burners, the fan and the ductwork. Here are 7 possible causes, and only some cost money to fix Ph: 425.402.4456 If your heating elements are burned out, the system will blow cold air. Why Does My Furnace Blow Cold Air? We’ve tried to troubleshoot the issues your furnace might be having. If your furnace is blowing cold air, give us a call today! What shoul I do next or how do I identify the limit switch. I?ve had people say to me, ?My furnace blows cold air only! Check if your thermostat is set to ON instead of AUTO. Sometimes, it’s best to call in the professionals when you’re stumped. If you can’t figure out the issue, give us a call and we will inspect your furnace. If your ducts are leaking (and ENERGY STAR says that almost all homes leak about 30% of the air in their ducts), cold outside air is making its way into your ductwork. There are four main components of a furnace. 6. It only takes one or more components to be out-of-whack, or not tended to that creates problems. Then when the thermostat is switched to "emer", heat blows. Electric Furnace. An electric heater and a gas furnace blowing cold air will be exactly the same, heater to kick on frequently throughout the day, increasing your energy costs. Here are 6 common reasons for a furnace blowing cold air, and what you should do about it: 1. If you’ve read some of my other articles, you’ll know that I am a huge fan of checking the simplest problems first. So, if you have a tripped breaker, the furnace may stay on however, the air can’t warm up because the gas burner can’t ignite. It has an led indicator on the control panel that is blinking 4 times. All gas, oil, and electric furnaces are sensitive and calibrated pieces of equipment. Electric heaters require power. Troubleshooting a Furnace That's Blowing Cool Air. Here are some of the reasons your furnace might be blowing cold air: #1. Replace or clean dirty or clogged filters. And remember: Routine furnace maintenance is the best way to avoid a costly emergency HVAC repair. Even if you have a gas furnace, they typically have an electric starter that ignites the gas burner. A dirty air filter blocks airflow over the furnace’s heat exchanger, causing it to overheat. If your furnace is blowing cold air, it … It will also depend on how much insulation you have around your ducts and how old your furnace is. 900 Northcrest Dr. Crescent City, CA 95531 The following are seven common problems that can cause your furnace to emit cold air. Is your furnace blowing cold air? If I shut if off for a few minutes and then try again, about half the time it will blow hot air. However, the fan will keep running, cooling the furnace to protect it from potential damage. An electric heater and a gas furnace blowing cold air will be exactly the same, so give it a few minutes after you turn it on. This post shows some basic troubleshooting ideas to get your furnace blowing hot again. In this setting, your fan will run continuously and will blow cold air. If gas supply is interrupted for any reason, the gas furnace … My two year old Lennox electric heat pump furnace stops blowing warm air every couple of days. You wouldn’t take your car to just any mechanic. Dirty Filter. Cold air trapped inside will need to be expelled before the hot air can take its place! Is the Pilot Light lit? If your fan only runs when your furnace is heating the air, then you’re much less likely to experience your furnace blowing cold air. Why let just anyone work on your unit? When an element malfunctions, you will need to call an HVAC professional. If they’re not, try changing the batteries. This raises temperatures inside the furnace, and the limit switch shuts heating cycles down if the unit becomes too hot. The blower begins blowing, but does not blow warm air, only cold- it doesn't heat up. 6. The cold weather has rolled in and you’re looking to warm up the house, so you decided to turn your furnace on only to find that it’s blowing cold air. The fix: Duct sealing. If it has, reset the breaker. This air might not always be cold, and could be room temperature as well. If this doesn’t fix your problem, and your furnace is still not blowing hot air, you can move on to some of the other potential culprits. This can cause the air to feel only lukewarm. Additionally, here are a few troubleshooting tips for you to consider if your AC stops blowing cold air. Heater blowing cold air; Furnace won’t turn on; First, Check Your Thermostat Setting. If you have a dirty filter, replacing the filter typically stops cold air from blowing. Before you call a pro, try these fixes: First, check your thermostat. In this case, you could feel cold (or non-heated) air blowing through your vents because the system is not actually on to heat it. Replace the old air filter. Dust and debris in your indoor environment can usually accumulate around the filters. There is a reason for this – it works! The lukewarm air coming out of your furnace can also be the result of leaky air ducts. How to tell if there’s really a problem. If your Oil Furnace is Still Blowing Cold Air, Check Your Flame Sensor. If you’re noticing that your furnace starts blowing cold air here and there, not consistently, it may be because your thermostat is set to ON. I can fix it by turning off the system and resetting the circuit breaker, but it gets pretty cold … If you can’t get your furnace to blow any air, hot or cold, it’s possible it has overheated. When overheating, your furnace can trip a high limit switch, causing the furnace burners to shut off so that the heat exchanger does not crack. We offer furnace repair and maintenance throughout the Chicago area, and our talented technicians can handle any furnace problem you may encounter. If your furnace keeps blowing cold air, you may notice that your air filter is too dirty. Call 888-868-6667 today or contact us online to schedule furnace repairs in Chicago! The fan blows fine. Frank’s Heating & Refrigeration. You’d want to take it to someone who’s certified to work on your make of car. I replaced the thermostat and that did not fix it. Dirty Filters. 707-464-9529. Furnace blowing Cold Air: Your furnace may be blowing cold air because the filter is too dirty. blowing cold air furnace broken It was a dark and stormy night. Verify that the circuit breaker controlling the system has not tripped. A home furnace, heat pump, or heater blowing cold air isn’t necessarily a reason to panic. If your furnace is blowing cold air, not blowing any air at all, or making odd noises, it’s important to schedule a repair as soon as possible. If your furnace is blowing cold air, our team at ABC Plumbing, Sewer, Heating, Cooling and Electric can help. Is my furnace not working?? Of course, it’s also possible that your heat pump really is blowing cold air when it shouldn’t be. If you’ve run through the thermostat test described above, you’ll need to take the next step of bringing in a professional for repairs. 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