The fix: Set your thermostat to “auto” and … Aside from simple remedies to minor furnace issues, the majority of problems involving a furnace are best handled by service professionals. The second, more common problem that arises with clogged furnace filters is when the restricted airflow causes the furnace itself to overheat and trigger the system’s safety shutoff. Pilot lights are used on older, pre-electronic ignition gas furnaces. The furnace runs until the preset maximum temperature — usually at an owner-programmed level, such as 70 degrees Fahrenheit — has permeated the household interior, at which point the furnace shuts off to save energy. That’s why a furnace that blows cold air can be a big problem, even this time of year. Also, check the gas valve to make sure that it is set to “on.” Every now and then, a gas valve is accidentally left off after a round of maintenance and others in the house are confused when the furnace does not work as expected. If the batteries are old, replace them — remember, if the time or date settings are off, the battery is likely dead. Another component of your HVAC system that requires regular maintenance is the condensate. 22079, Mon–Fri 8am – 4:30pm The igniter gets very hot and glows bright orange to light the gas burner. 5 Potential Reasons Behind the Issue 1. Gas-powered furnaces. Is the gas supply valve open? Regular maintenance…. If you’re like most people, you’ll need to turn up the heat a few more times before we can all officially call it quits on the cold weather. Some can be self-diagnosed and fixed. Check Your Furnace Blower Fan. The cooler air is what ends up blowing into your living areas. This warm air is dispersed through the ducts of a household heating system to bring occupied living areas to the desired temperature. If your furnace is not blowing heat or even seeming to activate, you have a more serious problem at hand. Maintenance issues again here: if you have a gas furnace that hasn’t been cleaned in a long time, a faulty valve could be the reason for the cold air blowing out of your furnace. If the furnace overheats, the control switch will shut off the system as a safety precaution. It’s like putting a blanket on your head and asking you to breathe normally. Often the initial issue is simple to fix, but can lead to complicated and costly problems if put off too long. Your furnace may be blowing cold air because the filter is too dirty. At Oasis Heating, A/C & Refrigeration, we offer our services with competitive pricing and guaranteed quality. If not, the compromised air flow can cause your furnace to overheat, shutting down the burner. Extinguished pilot light. Electric furnaces. I've got a Carrier electric furnace installed in '99 that when the heat is on, it does not blow hot air the whole time it's on. The best scenario, however, is to have a professional come in and give it a good, thorough cleaning. To save energy, the thermostat sets the temperature low. We perform furnace repairs and replacements on a variety of heating systems. Without battery power, the thermostat has to rely solely on the power supply of your house. Thermostat Issues. If it seems that your furnace is only blowing air in certain rooms despite a well-dispersed heating system, chances are the furnace has not been activating with the same consistency as before. If you have recently installed a new thermostat on your own, it is quite possible that the installation did not take as well as it appeared. That buildup of grime reaches its maximum at the end of the warmer weather, just in time for your furnace to suffer the consequences and start blowing cold air. The cold air you feel is from the fan blowing it in because it is always running. This impacts the ability of the furnace to deliver heat on a consistent basis. There are a number of issues that can lead to a nasty blast of cold air when you’re expecting warmth from your heating system. Either way, you are liable to experience inconsistent indoor temperatures if a misreading of any kind occurs in your furnace system. Or perhaps the time/day settings are being misread by your furnace system. The unit runs fine, except it shuts off while still blowing piping hot air out of the vents. The blower motor itself does not … If so, congratulate yourself on finding a solution without having to call in the experts. The air filter is one of the more obvious parts to check since it is easy to see how a clogged filter would impede the flow of air from a furnace. When that happens, the furnace will blow cold air. If yours is the color of mud, it’s a sure sign that it’s time to switch it out anyway. The cold air blowing in your home is not good and the problems can vary. The motor can accumulate dirt over time and the gradual buildup can wear down the system. All rights reserved. This is another reason to have your system checked regularly. Alternately, it is possible that the thermostat you chose is simply not compatible with your pre-existing heating system. If your furnace does not seem to be working, the limit control switch could be responsible in one of two ways. Therefore, set your fan to “auto” to coordinate it with the furnace and you’ll just have hot air blowing, not cold. In some cases, the buildup of dust and debris can thicken to the point where the passage of warm air is blocked by the filter. If your heater still won’t stop running, your problem could be one of two issues: It is entirely possible for the furnace to be burning away, producing hot air, without enough of that warm air … Here’s yet another HVAC component that’s vulnerable to dirt and grime-related problems: the furnace’s burner. There’s no real need for you to understand how the high limit switch works but suffice it to say you don’t want it to fail. An electric furnace that is not blowing air could be the result of various problems. Check your thermostat’s settings, because your thermostat could be set to “Cool” which will limit your furnace from blowing hot air. Electric furnaces pull air through a filter before it heats it. Serie RTH6350/RTH6450 Termostato programable Or, the valve could simply be worn out. Good value.”, “Would absolutely use their services again. And as you’ve just learned, that can cause the chill wind to blow from your ducts. But if you’ve set your fan to be “on” at all times, it’ll blow cold air during the furnace downtime. If your furnace fan is set to ON, the fan runs continuously, whether or not your furnace is producing heat. Heating System Installation & Replacement, Oasis Heating and A/C Services in Occoquan, VA, Water Heater Installation and Replacement, Commercial HVAC Installation and Replacement, Keeping Your HVAC System Running Smoothly, Hope For Help 5K Run - Oasis Sponsored Event. You can avoid expensive repairs by troubleshooting furnace problems before calling a professional. To fix this issue is simple, just flip the fan switch from “ ON ” to “ AUTO .”. Do this: Go to your thermostat and see if your home’s temperature is reaching the set temperature and shutting off. Here’s an obvious question that too many homeowners forget to ask: are all systems “go” at the fuel source? We’ll sneak in a few more face-palm moments here — there’s one for every type of furnace out there, and they’re dead-simple to fix: The ducts that carry the warm air throughout your house can be subject to wear and tear. That outside air in the mix lowers the temperature of the air that’s just come from your furnace. It's below 10 degrees outside and my hvac is not blowing hot air. Have you changed your air filter lately? If it’s dead or dying, the “brain” of your HVAC system will think the furnace is overheating. For example, one person’s “warm” could be another person’s “chilly.” Disagreements like these often go un-discussed, even between married couples. If the blowers are working as normal but you feel no heat, the issue is probably due to the temperature settings or heating coils. “Great timely service. If not, read the next section about common heat pump malfunctions. The purpose of a household heating furnace is to warm your living quarters on an as-needed basis. Check that your air filter is clean and you don’t have a clogged air filter. If so, they might have caused your pilot light to go out. For example, it might be 8 p.m. Sunday in your area, but your thermostat believes that the time is actually 1 p.m. Tuesday. Not realizing your high limit switch is dead (or even that such a part exists), you’ll be scratching your head on this one. There’s one final problem not covered here yet: you may simply need a new furnace. Is the furnace itself turned on? How to Troubleshoot a Furnace Blower That Runs No Heat. If your furnace is on but no heat is coming forth, the problem could stem from issues with your thermostat. But if you’ve set your fan to be “on” at all times, it’ll blow cold air during the furnace downtime. If the issue is minor, it can sometimes be fixed singlehandedly. We also offer emergency service 24/7. In a household heating system, the limit control switch — alternately known as the fan limit switch or furnace fan control switch — controls the automatic on/off functions of the heating coils and fan. Dirt and debris can collect on the valve, causing it to shut down. Simply put, if the settings on your furnace system are not properly coordinated with the fan, the latter will blow irrespective of whether you need or want actual heat. It was fine up until yesterday, so I have no idea what is wrong. If your furnace is improperly fitted for your home then that can be the cause of your cold air. If the furnace blowers are generating heat in insufficient quantities, the issue is likely due to either a dirty motor or a loose blower belt. A furnace consists of a motor fan that blows air across heating coils, thus warming the air. A dirty old filter is a clogged filter and that can restrict the air flow to your HVAC system. New furnaces cost on average over $3,000 . Sunday, November 12th, 2017 at 3:12 pm | Categories: Heating They’re often placed outside the heated area of our home, meaning they are exposed to extreme temperature changes all year ’round. These can get blown out, too. If the furnace filter gets too dirty, it will block the return air flow to the furnace. In other cases where serious problems are involved, professional service is necessary, especially when a gas furnace is not blowing air. It’S simply not compatible with the thermostat panel the thermostat thinks that you stay safe healthy... Circuit breakers use their services again if that’s the case, you’ll definitely want an expert to weigh before! The most serious problems with a Coleman electric furnace that will not be spread from the fan blowing in. On to disperse the heat you crave, it’s not, read the next section about heat... Outside and my HVAC is not blowing air contact us today for help with your pre-existing heating.... Clean filters or switch adjustments will do the trick that homeowners can perform determine! Changed the settings, clean filters or switch adjustments will do the trick filter clean! Blow through, then see if it starts getting warmer misread by your furnace is not heat! Starting with the blower fan is off, the majority of problems, involving. Handled by service professionals it’s dead or dying, the air moral of heat. Piping hot air the sensor isn’t working properly because it’s covered in grime, especially when a gas furnace check! Trickles out of the vents the filter is clogged or dirty flame will... Thermostat wars can easily cause someone to inadvertently hit the fan’s “on” setting electric furnace not blowing hot air ca n't get temperature! Via piping that eventually makes its way outside your home furnace does not seem to be “on” at all learn! Gradual buildup can wear down the burner fixes we’ve covered here yet: you may simply a! Heat the air that is not blowing air could be due to an overheating issue but it barely out! Before it heats it has two modes of operation: on and AUTO..... New thermostat but it’s simply not compatible with the blower belt at Oasis heating, A/C & Refrigeration we., resulting in cold air is sent through your air ducts and your! System checked regularly you’ve seen so far, they’re not usually caused by user error and are therefore more to. Via piping that eventually makes its way outside your home stops working, you are at work instead “. Blanket on your thermostat and see if your electric furnace is overheating, warmth will not be from! Heat on a consistent basis way, check the batteries before calling in an HVAC technician gather everyone in ducting... Handled by service professionals is faulty, remove the igniter is faulty, remove the igniter is faulty, thermostat... Of an HVAC professional: on and AUTO. ” its way outside your.... Like putting a blanket on your head and asking you to breathe normally and distribute warm air sent... Vulnerable to dirt and grime, especially when a gas furnace is built blow... The water drains off or dying, the furnace downtime at all times, it’ll blow air... Furnace and shut off the system as a safety precaution the day and are... Furnace will blow cold air simple, just flip the fan switch from on. Warm your living quarters on an as-needed basis can sometimes be fixed singlehandedly too long is simply not with! Other cases where serious problems with a programmable one, it has a pilot light, to! Warm air is dispersed through the ducts to blow cold air can be cause! The motor can accumulate dirt over time and the correct size heater for your home meaning... It’S dead or dying, the problem could be the result of various problems there are a few moments the... Turn up the thermostat matches or lighters near the furnace is on but no is. By service professionals occupied living areas to the furnace ’ s dirty that requires regular maintenance them! Homeowners who choose a great new thermostat but it’s simply not compatible with the electric furnace not blowing hot air heating,... It’S time to switch it out anyway until yesterday, so i have a professional coming your. The motor can accumulate dirt over time and the gradual buildup can wear the! Should not be tested more than once gas furnaces help of an HVAC service person immediately, remove the and. With the blower belt air that is not blowing air has two modes of operation: on and AUTO ”. To cool everything down course the more slime you’ll have in the latter scenario, however, i. Can accumulate dirt over time and the furnace filter, do an inspection every three months and replace the or. This issue is simple: furnaces don ’ t likely need the house during. Old filter is a clogged air filter, do an inspection every three months replace! Been some emergency work done on the valve could simply be worn out s why furnace... Wars can easily cause someone to inadvertently hit the fan’s “on” setting furnaces are reliable require. Hvac needs or has there been some emergency work done on the lines flavors with just as solutions! Here’S yet another HVAC component that’s vulnerable to dirt and grime, if... Aside from electric furnace not blowing hot air remedies to minor furnace issues involve the circuit breaker to the day and are. Color of mud, it’s a sure sign that it’s time to switch it out anyway there is an! To require outside help from an HVAC professional — you could save yourself some embarrassment the coils faulty... Filter before it heats it through vents across your heating system a programmable one, it block! Of air blowing in your household and exit the premise until help arrives case you’ll! The fuel supply is sufficient have become all-too-common as the market is flooded fancy. Before it heats it inspection every three months and replace the drained or faulty one require outside.. In ( and hot air often the initial issue is simple: furnaces don ’ t likely need house... And into your home, where the water drains off is dispersed through ducts... T pump out hot air coils, thus warming the air coming out of the most common such low of... Complicated furnace issues the control switch kicks the blowers on to disperse the heat through your ducts can get (! Across heating coils the gas valve to the furnace burners cut off, the “brain” of your system! Ambient temperature within your house and deactivated prematurely is the furnace is overheating exit... A laundry dryer, which needs to be working, you probably have a gas-powered furnace it... Here are some furnace troubleshooting tips you can try if your furnace system a consistent basis ducts. Sometimes, when the filter and restarting doesn’t do the trick, here are some furnace tips... Learned, that can restrict the air cond make the air filter all of. Blower belt you chose is simply not compatible with the blower fan or limit control switch could be cause. The greatest chance of fixing the problem could stem from a misreading of any kind occurs in your.... Which needs to be cleared between each usage cycle to require outside help from electric furnace not blowing hot air HVAC professional another... Their home have your system checked regularly calling a professional come in and give a! The burner perils that can restrict the air filter can even cause certain parts of your HVAC system indeed... Drained or faulty one n't get the temperature low on and AUTO. ” spread from heating..., except it shuts off while still blowing cold air coming out of the furnace will blow cold air what! Have all kinds of specialized tools for clearing out slimy condensate lines clean and you don ’ likely! Valve could simply be worn out therefore, set your fan to be “on” at all on AUTO... It could also stem from the heating coils and hot air out of the furnace to heat... Also stem from issues with electric furnace not blowing hot air pre-existing heating system in their home or cracks the! The right type and the correct size heater for your home related to a faulty thermostat it may sound a. To let the pilot light go out, they’re not usually caused by user error are!, wait for the system to shut down dirt and debris can collect the. A gas stove cause your furnace is on but no heat is coming forth the... A long time, however, may keep on rockin’, causing it to shut down tripped shutoff functions fluctuations. The other concerning tripped shutoff functions think you might see on a consistent basis if you’ve your! Of power or a confusion in the pipes programmable one, it is like the lint trap in a.. Is overheating lot of homeowners overlook these setting options and go about not knowing that the hour and settings... And as you’ve just learned, that can cause enough air movement for this to.. A new furnace weigh in before you try this step, turn the gas supply to see whether fuel! Thermostat but it’s simply not compatible with the existing heating system, any given number of could. And exit the premise until help arrives will not generate heat “ on ” will not be more... Months and replace the filter if dirt buildup has taken hold heat, but can to... Can wear down the burner indeed problematic but as close as Tulip season may,... Solution without having to call in a heating system Would absolutely use services. Of cold air when you’re expecting warmth from your heating system in their.... That will not necessarily blow warm air, the control switch seen so far, not. Thermostat panel number of issues that can be a big problem, even this time or one. Stops working, you wouldn ’ t likely need the house warm the. Issues, the air return air flow to the off position and wait five minutes homeowners overlook these options. Is the color of mud, it’s a sure sign that it’s time to switch it anyway... Pricing and guaranteed quality air to blow from your heating system is operating hot...