That may be a quick and easy fix. )Installing a filter that is too restrictive (1 and 2-inch pleated filters are common culprits)A filter that’s installed backwardsThe fix: Change your air filter if it’s dirty. The furnace turns … Furnace Not Blowing Hot Air – Problems & Solutions The reason your furnace is not blowing hot air could be a setting on the thermostat, a circuit breaker, or a clogged air filter. All rights reserved. Electric furnace putting out barely-warm air instead of hot air. Check Your Furnace Blower Fan. Was it turned off for any reason? There are a few potential reasons for the sudden downgrade in your unit's heating ability. Replace or clean dirty or clogged filters. Serving Hartford and New Haven Counties since 2006. It works fine otherwise, but since day one I noticed that it blows longer than old one use to work, and always blows lukewarm air. To fix this issue is simple, just flip the fan switch from “ ON ” to “ AUTO.” Auto setting will tell the furnace only to blow warm into your home when the furnace is on. Dynamic Mechanical Plumbing Heating & Air Conditioning Blog. Who Wrote the First Valentine’s Day Poem? 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. Is your furnace not blowing hot air? Do you actually have a gas furnace? For the best and most accurate answers, hire a professional to diagnose the problem. You may also see an error message on your thermostat, or a blinking LED light on the furnace control board. Your furnace blows hot air but that air quickly turns cold then the furnace shuts off altogether. The added complexity means that gas furnaces tend to be larger than electric furnaces, and more difficult and complicated to install. Cold air trapped inside will need to be expelled before the hot air can take its place! We can help you with all of your heating repair needs in Hartford, CT, including furnace and boiler services. 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. With so many complex mechanisms involved in a heating system, any given number of issues could cause the furnace to malfunction. Both of the electric heat strips (heat elements) come on; it blows warm air for a short period and then cool air. Try replacing your furnace air filter and see if this improves air flow. Warm air is sent through your ducts when the thermostat says it’s needed. Heating technicians, like those at Dynamic Mechanical Heating & Air Conditioning, can safely find what’s wrong with your Hartford, CT furnace and provide you with the correct repairs that will get your house warm once again. So it continues to run and run, resulting in excess wear and tear on the heating system that will probably shorten its productive life, as well as keeping your whole home too chilly. This can make the air coming out of the vents seem lukewarm. What to do if your heat pump is blowing cold air There are a few reasons your heat pump could be blowing cold air. If the burners ignite and heat, the problem isn’t the gas supply. The fix: Nothing. 207 SE D Avenue - Lawton, Oklahoma 73501 | 580-699-5660, © Copyright 2020, Pippin Brothers Home Services | Privacy Policy, 5 Characteristics of New Air Ducts That Improve Your Comfort. High-efficiency, two-stage furnaces are designed to run for longer periods of time and turn on and off less frequently. And make sure it’s installed correctly. To solve the problem, try these 2 things: Turn off the heat at … The fix: Contact a professional to figure out the problem and fix it. This will then heat your house more effectively, and let your furnace turn off after it reaches the desired temperature. Heat pumps typically produce air that is about 90-100°F, whereas furnaces can produce air as high as 120-125°F. Dirty air filters (Change it! My brand new Goodman furnace blowing lukewarm air. If the switch is in the ON position, then the blower keeps running, even when the furnace is not heating. So it relies on an auxiliary (AUX) heat coil (like the ones you see in a toaster) or a furnace to heat your home. However, the fan will keep running, cooling the furnace to protect it from potential damage. If the filter is clogged or dirty, it impedes the furnace's ability to heat the air. But it could also be a thermocouple or flame sensor problem (see below). A dirty air filter blocks airflow over the furnace’s heat exchanger, causing it to overheat. Is there an issue with the gas company? Your thermostat has an ON and AUTO switch that runs your blower. Replacing a Broken Hot Surface Ignitor Luckily, swapping out a … 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. 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. If your furnace overheats, it could end up blowing cold air. A professional heating contractor can quickly solve the problem before it becomes worse. Sign up for our newsletter to receive seasonal updates, news and tips. I went to check out the furnace and noticed a repeated clicking sound as though it is trying to ignite. When the air temperature reaches the setting you’ve chosen — let’s say 70 degrees — the furnace can take a break until the air drops below 70 again. Even if you can still stay “passably” comfortable from the lukewarm air coming from your furnace, you should never let a repair issue go without professional attention. Page top photo: Watch out: a return air inlet close to a gas heating furnace may be unsafe - see UNSAFE DUCT OPENINGS for details. Contact a professional heating company. These are the most common reasons a furnace will blow lukewarm air. If your gas furnace is blowing cold air and won't shut off, it could be related to a blown pilot light. Go to your furnace and watch it when it turns on. If your heater still won’t stop … The fix: Nothing. Do not attempt to diagnose and troubleshoot the problem for yourself, especially if you have gas-powered furnace. During a cold winter, your home’s furnace will become the most vital appliance you have. © 2013–2020 Dynamic Mechanical Plumbing Heating & Air Conditioning. Top 3 Reasons a Furnace Blows Cold Air #1 – Your Thermostat Is in the ON Position. Duct leaks can be caused by deteriorating seals, improper installation, and damage from pests. The cold air you feel is from the fan blowing it in because it is always running. in a 1991 or … This can cause the air to feel only lukewarm. Therefore, if it’s below 40 outside and the auxiliary heat isn’t working, then your heat pump will just blow lukewarm or cool air. |. When your thermostat is set to “on”, the fan in your heating and air conditioning system will run constantly—even when your furnace isn’t actually heating. If the furnace doesn’t light, it could be a dirty or bad thermocouple or flame sensor. Eight times out of ten, if your furnace is powering up, and everything else seems to be normal — except that it’s blowing cold air (well, unheated air) instead of hot air, you probably just need to replace your ignitor. The fix: Duct … This means that rather than just blowing air over heating elements, the clean air must be kept separate, typically by piping it through the heat created by the combustion process. Need more help? If you’re experiencing lukewarm are from your ducts in addition to symptoms of duct leaks like higher than usual utility bills, call a heating and cooling exp… Here are some reasons this could be happening. The most common reason why the air feels warm rather than hot deals with a hole in the air vents that carry the air out of the furnace. If your gas company has recently done work on the gas lines, it's not uncommon for your pilot light to blow out. Again, you can watch your furnace to see if it ignites correctly. As soon as the furnace cycles back on the air will warm up again. Furnace blows cold air: This article describes what to check if the warm air heating blower fan delivers intermittent cold air into the occupied space, or if the furnace cycles between blowing warm air & cool or even cold air into the building.. Reasons Why Your Furnace May Not Be Blowing Air. 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. The fix: Make sure the gas valve to your home is turned on. If you just turned on the heat, hot air may not yet be flowing through your air ducts. 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. Here are 6 common reasons for a furnace blowing cold air, and what you should do about it: 1. But, of course, there are many other possible causes. Learn more about how to tell if you have leaky ducts and how to fix them. Below 40 degrees, your heat pump struggles to heat your home. Have an expert inspect your ducts along with the furnace. The lukewarm air coming out of your furnace can also be the result of leaky air ducts. So when the furnace is in a lower stage of heating, the air won’t be as warm as a higher stage. Electric furnaces pull air through a filter before it heats it. Tuesday, February 18th, 2014 at 10:06 am | Categories: Heating The lukewarm air coming out of your furnace can also be the result of leaky air ducts. 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. Gas burns fine with typical noise, chimney pipe EXTREMELY HOT, but supply duct almost cold right after furnace. New heat pump owners often notice that the air coming out of the vents isn’t as warm as when they had a gas furnace. If your home’s air ducts are leaking, cold air could be making its way inside and mixing with the hot air produced by the furnace. If your furnace isn’t getting gas, or enough of it, the furnace may not be heating anything. 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. Is your furnace only blowing lukewarm air rather than hot air? 1. Once you’ve restored the correct setting, your furnace should blow warm air. Furnace Blowing Lukewarm Air Hi, I noticed that it was a little cold in the house so I put my hand by the vent and the air blowing is lukewarm at best. The fix: Set your thermostat to “auto” and the fan will only run when the furnace is actually heating. More cool air than warm. One of the most frustrating issues you can face in your home is finding yourself with a furnace blowing cold air. This is normal. Your System Was Just Turned On. You can check this by cranking your thermostat up a few more degrees to see if the air gets warmer. If there’s a problem with your thermocouple or flame sensor, it won’t let your furnace ignite the burners. Check if your thermostat is set to ON instead of AUTO. I have ho clue where the hot air disappears. Historic Preservation of Old Bristol Houses, Radiant Heat Installation and Replacement, Air Conditioning Installation and Replacement, Water Heater Installation and Replacement, Commercial HVAC Installation and Replacement, Dynamic Mechanical Plumbing Heating & Air Conditioning. As long as the thermostat is reaching the temperature you set it at, it’s working fine. 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. 3 Potential Reasons Your Furnace Is Blowing Out Lukewarm Air Posted on 26 August 2016 Has your furnace suddenly become inefficient to the point that all you can receive is lukewarm air regardless of the thermostat setting? Tags: Furnace, Hartford, Heating You expect to receive a steady supply of warm air from your vents whenever the furnace turns on. This is a short resistive element furnace (maybe an air handler with heater?) The fix: Duct sealing. This “hot then cold air” sequence happens over and over and your home isn’t warming up. In such cases, a safety control device known as the limit switch will shut off the burners. The blower motor itself does not create the heat; rather it blows the heated air created by the furnace through the system's ductwork. After ruling out all of the ‘simple’ problems above, the most likely cause of a furnace not blowing air is a problem with the blower fan itself which, if you remember, is the fan that circulates your house’s air over the heated coils. This will make the air only lukewarm (or cold). This is normal for heat pumps. You expect to receive a steady supply of warm air from your vents whenever the furnace turns on. 11. If you notice warm air only hitting one of your rooms, check the vents nearby for holes and patch up any you see. If you have a washable air filter (which I wouldn’t recommend), then ensure that … Check your gas supply. If your furnace is blowing cold air some of the time, but working otherwise, there are a few possible reasons for the problem. This can cause the air to feel only lukewarm. The cold air you feel is from the fan blowing it in because it is always running. To fix this issue is simple, just flip the fan switch from “ ON ” to “ AUTO.” Auto setting will tell the furnace only to blow warm into your home when the furnace is on. Explanation: If your furnace is overheating, that means your heat exchanger is getting too hot. If your furnace won’t stop running and blowing hot air, you should first check your thermostat and make sure it’s set to “auto” instead of “on” — this way, the furnace will shut off when it reaches a certain temperature. The reasoning here is simple: furnaces don’t pump out hot air nonstop. The problem could soon cause a complete breakdown or even a safety hazard. An electric furnace that is not blowing air could be the result of various problems. It is usual for cold air to enter the heating system until it is warm, and then for warm air … 10 Common Reasons Why Your Furnace is Blowing a Cold Air Read More » Getting home to a cold house and having a furnace that blows cold air is a headache. If your furnace is blowing cold air, or is not operating at all, a component called the fan limit switch may have malfunctioned. It's also possible that the furnace's pilot light isn't well shielded. Dynamic Mechanical Heating & Air Conditioning has heating technicians standing by to assist your 24 hours a day. You may need to call in a professional if there’s a gas issue inside the furnace itself. This makes them more efficient similar to the way your vehicle is more efficient breezing down the highway than in stop-and-go traffic. If the airflow to your furnace is restricted, it can cause your furnace burner to shut off while the blower keeps running. Other potential problems include a bad blower fan or limit control switch. Change the air filter. This results in mild, lukewarm air emerging from the vents. Your furnace may be blowing cold air because the filter is too dirty. Or is your heater an electric heat pump? 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