If your furnace is blowing cold air, or is not operating at all, a component called the fan limit switch may have malfunctioned. Also, why is my heater blowing out cool air in my house? This time of year, especially when it gets cold outside in the evenings, we get many calls from homeowners concerned that there is cold air blowing out of the duct registers in their home when their heat is running. Changing the air filter can possibly fix the cold air problem, but only if that’s the only problem that is keeping the heat from blowing hot air as opposed to cold air. If cool air continues to blow out, the first thing you should check is your coolant level. 11. In the summer, a heat pump picks up the heat in your home and dumps it outside. There are two different system types: forced air duct systems that push warm air with the aid of a blower into the system and vents, and gravity furnace systems that use convection currents to circulate the warm air. Simply put, the furnace inside the equipment needs to get heated up for the fan to emit warm air. God's grace of all people in Christ. If you have an electric furnace, a tripped breaker can cause problems and heat won’t be able to circulate through your home, in fact, the system may not run at all. To troubleshoot a misbehaving gas furnace, start with the easiest explanations and solutions, then work your way to the most complicated. As the frost builds up on the outdoor coil, it could potentially inhibit the ability for air to flow across that coil. Don't panic if you have a heat pump and if cold air blows out of your duct work for a little while on and off while you run your heat at home. There are many reasons your car's heater isn't working. In that case cool air will be running through the system This just means a simple thermostat adjustment. It's all part of the process of heating your home with a heat pump! Your furnace blowing cold air could be caused by hot air escaping through holes in the duct work that carries the heat throughout your building. This is plenty warm to heat your home to your desired 72°F. Make sure no one is lowering the thermostat to cool things down or, in an attempt, to save money by turning down the temperature. Basically, the furnace isn’t lighting the fuel, meaning it can’t heat your home, either. If you have ruled out number 1 and number 2 on the list, the next thing you want to consider is checking to see if you have a thermostat problem. Even if you have a gas furnace, they typically have an electric starter that ignites the gas burner. Your ducts are usually in the attic and outside of your insulation, exposing them to the bitter cold. People’s comfort level where indoor temperature is concerned can vary. If your heat pump has iced over or if drifting snow has covered up the unit, this can cause a malfunction. And you wait — and wait — but the heater just blows cold air. Your heat pump might not actually be blowing “cold” air. If the air feels warm for a moment or two, then switches to cold, it may be that the flame sensor is dirty. The lukewarm air coming out of your furnace can also be the result of leaky air ducts. If you only feel your furnace blowing cold air briefly, and the air is quickly replaced by warm air, this is … If you’ve just bumped up the temperature or if you’ve just turned your furnace... 2. Some other issues that may be causing your heat pump to malfunction include, low refrigerant, bad valves or a faulty metering device. Now, that may be hard to grasp, but this is the way it works. Heat Pump – If a heat pump is blowing cold air, its auxiliary heat strips might be malfunctioning or the level of refrigerant might be too low. Let us explain… The air could be warm but still feel cool. A lack of heat can be a symptom of a much larger problem. HVAC & Electrical SC License: #M111708 If you experience this problem, this list may help you discover the issue and make the fix. A Note About Our Hours and COVID19: Open As Usual! The flame sensor tells your gas heating unit to turn on and warm the air that is cycling through. Electrical NC License: #L.24758, All Content Copyright © 2020 Horne Heating and Air Conditioning Inc. | Privacy Policy | Sitemap, Six Reasons To Schedule Your Air Conditioner Tune Up, Learn About the Steps Involved in Installing a New Furnace. Phone: (704) 321-4173 You may also see an error message on your thermostat, or a blinking LED light on the furnace control board. Well this happens sometimes and a few things can be the cause. Have an expert inspect your ducts along with the furnace. If your heater is blowing cold air, it can be incredibly frustrating and make for a chilly winter in Georgia. Perhaps your temperature gauge is running below normal. The sound you hear is the reversing valve switching your unit over to cooling mode. If your furnace seems to be blowing cold air, it could be a problem with the ignition system. He called me over to help repair his system. It can also prevent them from igniting. Solution: Change the air filter and see if your furnace starts only blowing warm air. There could even be a puddle of liquid under the front of the vehicle. Why is My Heating System Blowing Cold Air? Check out this article, on how to tell if your unit is a heat pump or air conditioner. In the summer, your indoor coil is cold (and pulls humidity out of the air, and comes in the form of water) which is drained from that PVC pipe located on your roof, or side of your house. The importance of a church family where you can build and mature in a life of service and faith. If your flame sensor is dirty, it may not recognize whether your burners have turned on. 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. If this doesn’t happen after 10 minutes, then you are looking at another issue. Is someone else adjusting the thermostat? 6. Have you cranked up your thermostat to knock the chill down only to discover that your heater is blowing out cold air. We wanted to address this, as many times homeowners think this is an issue with their heating and cooling system, but if they have a heat pump, it's actually typically a very normal process. Frost on the outside coil is condensation that forms up on the coil in the form of frost. This is something you can easily fix yourself. 7 common reasons a heat pump blows cold air BEFORE READING FURTHER: Watch this video on how a heat pump works. Heating systems work by heat exchange, which means that your HVAC system returns the cold air to the outside of your house. This is because hot refrigerant circulates through the outdoor coil, which in turn melts the frost. Don't panic if you see frost on your outside equipment's coil. Call a professional for inspection and repairs. Two thermostat issues that could cause your furnace to blow cold air include: Your thermostat is still set to COOL not HEAT Your thermostat fan setting is set to ON not AUTO There are four main cooling system problems that can cause a heater to blow cold: Stuck thermostat. Hopefully, being patient will pay off and your heater will soon be sending warm cozy air throughout your home. The air coming from your supply vent should be anywhere from 15-30 degrees hotter than the air near your return vent (depending on how cold it is outside). If your pilot light refuses to remain lit, this is an indication of a problem that will need to be fixed by a professional. Check with the folks that live with you to make sure they aren’t adjusting the thermostat. If the furnace is cold, it cannot heat the air being propelled outside. This cycle must be completed a few times before air from the heater can successfully warm your home. In the winter, that same humidity is pulled out of the air, but it comes in a form of frost on the outdoor coil (condenser). Your furnace may be blowing cold air because the filter is too dirty. A dirty air filter can block airflow over your furnace’s heat exchanger, which can cause it to overheat. Over time, the changing temperatures wear on all sorts of things and your ductwork is no exception. If you have a programmable thermostat, make sure that your thermostat is properly programmed. You may have noticed a loud sound right before cold air blows out through the vents in your home. How to relight your furnace ’ s heat exchanger, causing it to overheat pushed through the outdoor air your... ’ s pilot light the coldest days of the outside equipment 's coil loud sound right before air... 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