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. Your furnace may be blowing cold air because the filter is too dirty. Other potential problems include a bad blower fan or limit control switch. Check the air filter.. Has it been awhile since you changed your furnace air filter? runs constantly and can't get the temperature down. Because it illustrates just one of many reasons why a heater might blow cold air, and an air conditioner might blow hot air. Instructions. Why Is My Furnace Blowing Cold Air (And Other Signs It's Time To Get It Looked At) One thingâs for certain: Your furnace should be keeping you warm â not blowing cold air. But if you have low refrigerant charge (due to a leak, most likely) then itâs not bringing in enough heat to warm your air. If youâre getting cool air instead of warm, the problem may not be your furnace at all. When you have your thermostat in the âonâ position, your furnace will constantly blow air even if your furnace is not producing heat. The Circuit Breaker Is off If a duct has collapsed or is severely obstructed, youâll experience a reduction in airflow. While working with the ignitor is a job for a pro, you can check for a dirty ignitor if you know how and feel absolutely comfortable shutting off power to your furnace, taking off the front panel, and locating the ignitor. With such low volume of air blowing, the air cond. Whether you need a new forced air furnace, a mini split system or a room heater, Total Home Supply has you covered. How to Troubleshoot a Gas Furnace That Produces No Heat Tools and Supplies You Will Need. Is your furnace not blowing hot air? Hello, My furnace is running but the burners aren't firing up. Check that the gas valve handle is inline (parallel) with the gas pipeâthat means itâs on. It may... 3. Donât freeze on days and nights you should be warm and cozy. Leaving the fan set to On causes the blower to continue running air, even when itâs not warm. Â© 2018 Althoff Industries. To save yourself from a large expense and time without your furnace when you need it most rely on an HVAC repair service you can trust. Here are some reasons why this is happening and tips on how to fix it. I tried bleeding the lines, reset the gas valve and cleaned the burners but still no luck. If youâre getting cool air instead of warm, the problem may not be your furnace at all. Is your furnace blowing hot air in some rooms but not in others? Thereâs only one thing worse than a furnace not working, itâs a furnace blowing cold air. Gas leaks are dangerous. You might not think your filter contributes to your AC not blowing cold air, but it does. If youâre in the Greater Chicago area, schedule your furnace service online or give us a call at (815) 455-7000. Why is my furnace only making a If you havenât been regularly checking and changing your air filter, itâs most likely extremely clogged. Heat pumps typically produce air that is about 90-100°F, whereas furnaces can produce air as high as 120-125°F. Top 10 Furnace Questions & Answers By Andrea Pohlsander January 22, air filter and see if it starts blowing only warm air. Regular furnace service prevents costly repairs such as a cracked heat exchanger, frozen evaporator coils, refrigerant leaks, faulty thermostats, and clogged air filters. Typically this will be accompanied by a limit open error code on the furnace control board. Here are the most common signs of a faulty furnace. But if your furnace comes on and the air coming from the ventilation system is only lukewarm, resulting in insufficient heating for your house, you should call for professional repairs right away. You should also take the time to make sure that the thermostat isnât being changed by other people, and that your thermostat also isnât on the âFANâ option. A clogged filter will restrict air â¦ Eight times out of ten, if your furnace is powering up, and everything else seems to be normal â except that itâs blowing cold air (well, unheated air) instead of hot air, you probably just need to replace your ignitor. Thatâs why minor issues with your heating system still deserve a lot of attention, even if itâs something that is as simple as a furnace thatâs blowing warm air rather than hot air. Your furnace might lock down for safety reasons if it is not getting the amount of gas it requires to provide warm air. Thermostats are fiddly thingsâplus, you never know who in the house might have done some âunauthorized adjustments.â. If youâre in Orange County or surrounding areas, schedule your service online with White Mechanical, Inc., or give us a call at (949) 328-3370 for all your HVAC needs. The fix: Nothing. The amount of hot air and which direction it blows are controlled by the buttons and switches on your dash, which direct the â¦ Your Thermostat Setting Is Wrong This may seem like a painfully obvious reason for why your furnace isn't blowing hot air, but you'd be surprised at just how many people don't check their thermostat first before â¦ 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. These can malfunctionârepairing or replacing them is a job for a professional HVAC technician. What temperature do you feel blowing from the vent? Has it been awhile since you changed your furnace air filter? Thanks a million for your support! If that doesnât help but you still suspect your furnace is overheating, itâs time to call in a professional HVAC technician. Why Is My Furnace Running but Not Blowing Hot Air? Cleaning the furnace filter and the surrounding areas is easy to do. the fan is always on (because we're not at the desired temperature). The cold air you feel is from the fan blowing it in because it is always running. Does it seem like the airflow is weaker than you remember? When you get to your destination, you expect to walk into a toasty warm space. Youâll need a visit from an HVAC professional to make this furnace repair. Furnace Not Blowing Hot Air? The most common issues that cause your furnace to blow lukewarm air, including: Check your thermostatâs settings. If the airflow to your furnace is restricted, it can cause your furnace burner to shut off while the blower keeps running. This is normal for heat pumps. Still getting cool air from the vents? Lastly, if your furnace is overheating, it can result in your furnace blowing out cold air rather than warm air. However, not as many people have experienced a central heating system that doesnât work. Or maybe the air starts off hot, then turns cool before the furnace shuts down. 1. Clogged and Dirty Filters Yet so many homeowners do not know what to do to reap these benefits. It is entirely possible for the furnace to be burning away, producing hot air, without enough of that warm air ever actually being distributed through your home. But if you have low refrigerant charge (due to a leak, most likely) then itâs not bringing in enough heat to warm your air. This gives us a small commission at no additional cost to you and helps us continue producing more videos! Once the air flow is no longer restricted and the unit cools down, the furnace should start blowing warm air. Most modern gas furnaces have an electronic pilot igniter coupled with a flame sensor rather than a physical pilot light. 8001 South Route 31Crystal Lake, IL 60014Phone: (815) 455-7000Office Hours: Mon-Fri 9:00a-5:00p, 4152 May St.Hillside, IL 60162Phone: (312) 332-5700Office Hours: Mon-Fri 9:00a-5:00p, 24 Hour Emergency ServiceToll-free: (800) 225-2443Fax: (815) 455-8354. 1) Change the furnaceâs air filter if itâs dirty. The reasoning here is simple: furnaces donât pump out hot air nonstop. The cold air you feel is from the fan blowing it in because it is always running. Common furnace issues like when a furnace is not blowing hot air can be as simple as a filter. The most common reason why your furnace is not blowing hot ar is related to the filter. The furnace is a York 8.T 80,000/64,000 BTU model from 2005, model number PT8A12N080UH11B. The cold air you feel is from the fan blowing it in because it is always running. In the end, it may not even be a problem with your furnace if it's not blowing hot air. If youâre still not getting warm air from your furnace, we can help. Your furnace has one job: blowing hot air. Even after performing the necessary troubleshooting, if your furnace is still not blowing hot air, the best solution is to call HVAC professionals. 7 Reasons Your Heater Blows Cold Air/AC Blows Hot Air. 5 Potential Reasons Behind the Issue 1. The furnace is old but the air cond. (916) 256-4447 Schedule an Appointment Click for Financing Call Today! It will cause your furnace to overheat and eventually stop functioning. COLD â This means your thermostat is cooling correctly, but the heating isn't working properly. It is usual for cold air to enter the heating system until it is warm, and then for warm air â¦ 10 Common Reasons Why Your Furnace is Blowing a Cold Air â¦ There is a good chance that you will find and correct the... Major Service Issues. Cracks, holes and gaps in your ductwork allow the hot air from your furnace to escape before it reaches the vents. Even worse, the furnace is blowing cold air! Not only will you have cold spots, but leaky ductwork will run up your energy bills and pull in dust and debris that then gets circulated into your home. If your furnace wonât stop running and blowing hot air, you should first check your thermostat and make sure itâs set to âautoâ instead of âonâ â this way, the furnace will shut off when it reaches a certain temperature. Check if your thermostat is set to ON instead of AUTO. The air blows cold but it barely trickles out of the vents. New furnaces cost on average over $3,000 . There may be a problem with the thermocouple or ignition system. If the furnace filter gets too dirty, it will block the return air flow to the furnace. There are some other causes of improper furnace air flow, but those are the most common and easiest to detect and repair. Check the Service Door It is possibleâparticularly if youâve recently changed your furnace filter or done other maintenanceâthat the door to your furnace â¦ To address this issue, weâve come up with some common reasons your furnace may not be blowing hot air. Make sure the thermostat is set to a higher temperature than your home, and running on... 3. Here are some of the common problems related to a faulty thermostat. To warm your cold inside air, the heat pumpâs outdoor unit uses liquid refrigerant to absorb heat from the outside air. If itâs running constantly, it will keep air circulating whether the furnace is actively heating or not, which could explain the cold air you can feel swirling around your feet while you watch TV. Ask a Phoenix tech. Do you have an automatic electric starter or a pilot light? Solution: Change the air filter and see if your furnace starts only blowing warm air. If the fan limit switch malfunctions, the blower might continue to operate even when the furnace is not heating the air resulting in your furnace blowing cold air from your registers. 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. Someone may have shut off the gas supply valve to do a repair and then forgot to turn it back on. When the air temperature reaches the setting youâve chosen â letâs say 70 degrees â the furnace can take a break until the air drops below 70 again. There could be a few reasons why your furnace is chilling the room. The fuel system, the burners, the fan and the ductwork. Problems with your vents or ductwork are likely to blame. Without the gas supply, thereâs nothing for your furnace to burn to create the heat. A clean and healthy furnace filter results in energy savings, home comfort, better air quality and a longer lasting furnace system. what can be happenin â¦ read more If your thermostatâs fan setting is set to ON, then your furnace blower will constantly be operating ever when it is not putting warm air into your home. The pilot light might be out. If you use disposable air... 2. Shop our heating products today and enjoy fast, free shipping on any order. Simply put, a clogged air filter can cause your furnace to overheat, shut itself off and give you the illusion of a furnace not blowing air when, in fact, it is your air filter that is causing your furnace to turn itself off as a safety precaution. If you use disposable air filters, we recommend checking them every month and changing them if theyâre dirty. There are many reasons an HVAC (heating, ventilation, air conditioning) system might stop working. See the Ignition section from above. 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