Take a minute and explore the many reasons why people turn on the furnace and hear, well, nothing but crickets. The furnace should turn back on within five minutes (many thermostats have time delay in them), but if it does not, visit the furnace itself. Known as one of the favorite heating companies in the area, we’d love to welcome you into our family. If you cannot fix it, go to the next step. Try the following troubleshooting steps before calling an HVAC technician. One is to tell the blower fan when to turn on and off. If a pump empties the condensate pan, see whether the pump is stuck in the “up” position. The process goes like this: All of the above initiate combustion, which you need to create heat. Look for the switch next to or inside the furnace cabinet. “Furnace Switch,” courtesy of Jen Durfey. People sometimes turn off these switches accidentally. This can be caused if the furnace vents are blocked. Details. All HVAC technicians have at least one humorous story to tell about service calls for broken furnaces. If you own a digital or programmable thermostat, you might have another problem — the power. Or has an appliance been acting funny or not running well? 1. The team at Jerry’s Heating and Cooling understands how vital a working furnace is when the temperature drops. Also, if the limit switch forces shut-off of the furnace burners too often, the furnace could go into a hard shut-down. Before you do anything else, make sure you have electricity going to the furnace. 3) Adjust the flame using your furnace’s pilot light screw (if needed). Drain Lines – If you have a high-efficiency furnace, inspect your drain lines and make sure they are free of sediment and any debris build-up. Before starting any cleaning or repair process, be sure that your furnace’s electricity, and gas, are off. 5 Common Furnace Problems Homeowners Experience, Copyright © 2020 Jerry's Heating & Cooling. Unlevel Thermostat. We’ve shared some of the most common problems that cause a furnace to give you trouble. This can cause your furnace to turn off as a safety feature (to prevent overheating). The valve should be either all the way on or all the way off (this is one reason why many manufacturers have switched to switches and buttons). Oftentimes, the furnace doesn’t kick on because the homeowner thought that the valve should only be partially turned for safety reasons. CC licensing. If your furnace is not turning on, you may have a faulty limit switch. At that point, your heater repair technician will need to service the furnace. Consider adding condensate pan tablets to your tray when this happens. All gas appliances are set to operate with a standard supply pressure of approximately 3psi. The next issue you should for when the furnace doesn’t turn on is the filter. Design by Media Bug. In most heating systems, you’ll find the filter in the blower compartment. To turn the furnace back on, relight the pilot light. If a bird or mouse blocked up the PVC pipe or flue and the furnace’s fumes cannot escape, the furnace might stop running. While cleaning, keep an eye out for rust or misaligned parts that may need to be addressed by a professional. When the pilot light is on, slowly turn the screw until the flame is a consistent 1½ to 2 in. With parts of the country already enjoying the first snowfall, it’s time to gear up for the home heating season. There’s nothing as disheartening as a furnace, not turning on when you need warmth. If you’ve tried to turn your electric heater on and nothing has happened, there are a few things that you can try to correct most electric furnace issues. Filters trap dust and debris, including pet hair. Anytime you're performing work on a device that requires electricity, you should turn off the power to the device. On your thermostat, turn the setting to “on” instead of “auto.” If the furnace’s fan comes on, the furnace has power. Newer gas heaters use an electric ignitor, which lights the furnace. If you or the previous homeowner ran the furnace last winter (or for several winters) without changing the filter, it’s likely clogged with grime and dust. If not, it lacks power. The LED indicator light is not on and the furnace/burner/motor is not on. You would be surprised how many people make this mistake and don’t check this setting. Flush the hose out with a bleach solution if it appears dirty. Failing appliances can send surges through your electrical system. It was just working yesterday. If it will not stay lit, however, turn off the furnace’s power and gas supply and try the following. If your furnace isn’t turning on, you should check for issues with one of the following: Thermostat; Electricity; Fuel; Don’t worry, we’ll walk you through some troubleshooting steps to help pinpoint the issue. The mercury switch inside your thermostat must be perfectly level in order to read the temperature accurately. Hi All, I have a Lennox Pulse furnace which is over 20 yrs old (just bought the house last year). At that point, your heater repair technician will need to service the furnace. The other function, and the one we’re concerned about here, is to act as a safeguard. If it is neither of these reasons causing the issue, try turning the fan switch to "on" to force the furnace to start blowing air. Unscrew and replace any fuses that are blown. Upvote (0) Subscribe Unsubscribe. 4 The motor may need to be reset because of an overload. Ask yourself: Were you running too many appliances/devices on the circuit? It's less - Answered by a verified HVAC Technician Possible reasons a furnace continues to trip circuits include: You may also have a general problem with the electrical panel or your circuit breakers. u/valtmiato. At the furnace, find the furnace’s power switch. The first thing you want to do if your furnace won’t kick on is to check and see if the thermostat is set to heat and not the air conditioning function. Otherwise, faulty wirework or a broken thermostat is to blame. Archived. Hopefully, by the end you’ll have solved the problem. Blinking lights that has a code 2-3. Turn any breaker that is in the "Off" position to the "On" position. If everything with your thermostat is fine, your furnace might lack power. My furnace is not turning on. Lennox Pulse furnace not turning on? Patriot has more than 25 years of HVAC experience and is available 24/7 for emergency repairs. Why Is My Air Conditioner Blowing Hot Air? Most of the time when a furnace will not turn on, it is because the thermostat or furnace itself has lost power. Replacing furnace filters is especially important during seasonal changes when furnace or AC system kick on for the first time. Open the electrical panel and look for a tripped breaker. However, if the control board is defective, it may not be sending power to the ignition system, which … If not, though, just reach out for some help, we’ll be happy to fix your furnace. Another way to determine whether your furnace will not turn on due to your air filter is to listen for whistling sounds. Posted by. Do a thorough job, but be careful not to break anything. Wait approximately 30 seconds and then turn the thermostat back on and increase the temperature to the desired level. If changing the batteries does not help, go to the circuit breaker or fuse box and see if the circuit for the thermostat has been tripped. If the furnace keeps cycling on and off despite the temperature meeting then there is some problem with the furnace functioning. If it is clogged, it has not been replaced as frequently as it should have! Remember, we’re not laughing at you. The first thing you’ll want to check is your … If your thermostat does not turn on, you will need to check on its power supply. Your next step should be to check your air filter. If the circuitry has been tripped in these panels, turn back on the circuit. If the breaker doesn’t turn … If after you’ve performed all the diagnostics your furnace still won’t kick on, then you’ll want to call a professional. This button controls an automatic shut-off feature that shuts down the furnace if it gets too … If you turn the furnace on and it trips a circuit again, you have a different type of issue to solve. I have a furnace and it shows as code 2-3. You come home from work, and your house is freezing: the furnace has stopped working. On the other hand, if you own your own gas or propane supply, make sure the storage tank still has fuel. Check your thermostat when your furnace won’t start. If the circuit breaker is tripped, turn it all the way off then back on (should hear click). Replace the batteries if the thermostat is battery operated. Easy Troubleshooting in 7 Steps. If resetting the breaker works, you’re back in business. The switch will look like a light switch. Close. If it isn’t on, turn it on, and wait for the furnace to engage. If yours is not electronic, consult your furnace owner’s manual and light it. Furnaces don’t work unless you set the thermostat to HEAT. These appliances need repaired or replaced. The most common causes of your furnace not turning on or not heating are: 1. It is very easy to remove the sensor with a screwdriver. The result is restricted airflow, the heat exchanger’s potential to overheat, and, eventually, limit switch failure. You might chuckle a bit, but before you start rolling on the floor, check your thermostat! It worked fine all winter but the other day I noticed the thermostat light was on (calling for heat) and the furnace wasn't running. Batteries in these units typically need replaced every couple of years. The first thing you will want to do when figuring out why you furnace does not work is to check the thermostat. Make sure the gas line is turned on. If the furnace fires up but then shuts off after a few minutes, it could be that the control board is faulty. If you haven’t updated yours in a few years, why not consider installing one of the new, programmable thermostats? Then, turn off the power supply to your furnace at the breaker box. Learn more. Closed vents will not allow air to circulate in your house. 3 Be sure the furnace’s power switch is turned on. When you can fix the water issue, the furnace should kick back on within a minute. Make sure you’re not still using the COOL setting. Your thermostat is responsible for telling your furnace when to turn on and off. Make sure the thermostat is set to “heat,” and look at the temperature. By the way, inspecting and cleaning the ignitor is typically something your HVAC technician does as part of your annual furnace maintenance. It might sound obvious, but make sure your indoor vents are open. You come home from work, and your house is freezing: the furnace has stopped working. If your furnace still refuses to turn on, check your programmable thermostat for an error code. Why is my furnace not kicking on? First, make sure that power is getting to the motor. Oil furnace not turning on . Furnace Will Not Turn On? Sometimes, pressing the reset button is all that is required to get your furnace working properly. Set the Thermostat on HEAT Power surges damage electronics and appliances and, at worst, can cause thousands of dollars in damage. 1) Take a fine wire and poke it into the holes where the pilot flames burn to knock out debris. These tablets will keep the drain from clogging. Furnace not turning on 0 Recommended Answers 0 Replies 0 Upvotes. Unfortunately, some homeowners find themselves in the very difficult, confusing circumstance of turning their heater on and getting no results. Before You Call – A Few Simple Troubleshooting Tips Can Save You Money This Summer, © Copyright 2017 by Patriot Heating and Air Conditioning. I went downstairs and took the cover off the furnace to see what I could see, and didn't really see much. Step 1 Replace your "furnace limit switch." Even if your system runs on natural gas or oil, it needs electricity to run the mechanical components. Also, if the limit switch forces shut-off of the furnace burners too often, the furnace could go into a hard shut-down. If your pilot light will not come on after cleaning the furnace, check your gas or propane supply as a final step to find out why your furnace will not start. I put it back to position but it didn't help. Step 2 Turn the power button next to the AC/heating unit to the "On" position. If your furnace is coming on and isn't turning off, you need to investigate the issue, as it could end up costing you excess money on your utility bill at the end of the month. If your system overheats or experiences a similar malfunction, you can simply reset your furnace.Here are the 4 steps needed to reset your Lennox furnace, Find your electrical panel and switch the breaker that controls your furnace, and have it up and running again in seconds. 1. If the furnace is not on a dedicated circuit, another appliance might have caused the power surge that tripped the furnace’s breaker. Your furnace will not turn on if your air filter is clogged. Everybody hits a rough patch at some point, and yours might be today. Check for the furnace box, see if there is anything that is blocking the furnace vents. A faulty ignitor makes it nearly impossible for a furnace to turn on. The lockout condition can be reset by turning the thermostat off and reducing the temperature to a value which would not cause the furnace to turn on. In addition to this, make sure that the thermostat is set to a temperature higher than the … Oil furnace not turning on. You can use thermostat to test it. If your furnace has a reset button (it’s often a red button located on the front, side or back of your furnace), try pressing it. If you’re intent on spending a cozy evening at home, schedule an appointment with a qualified home furnace repair company. Clean the probe on the sensor by rubbing it with some medium grain sandpaper. You don't want your furnace to accidentally ignite while you're working on it. I checked the main breakers, one of them were tripped. Most of the time when a furnace will not turn on, it is because the thermostat or furnace itself has lost power. So if your thermostat is not set or working properly, it might never tell your furnace to kick on. If you have a Honeywell thermostat not turning on the AC or the heat, this could be a quick fix. It’s better if you know where to find and how to change your furnace filter before things go awry. You indicated you have already done this, so this is not the problem. Most disposable, pleated furnace filters need changed every 90 days, per manufacturer instructions. To prevent this issue, clean off the burners before turning your furnace on for the first time of the season. High-efficiency furnaces pull enough heat out of the air that water condenses. A dirty filter can cause a heating system to shut-down. CC license. The control board sends power to the ignition system, which fires up the system. If the pan has a drain, check to see if a clog is blocking the drain. After months of not being in use, various components of your furnace can fall into disrepair. One of the first things to consider when your furnace isn’t working is that your commands are simply not reaching the machine, meaning there could be a problem with the thermostat you use. Now, we’re getting down to the nitty-gritty—on its own, a dirty filter may not interfere with your furnace turning on, but if it causes overheating in the heat exchanger too many times, it could kill the electronic limit switch. Nest Wifi, Google Nest Device. Basically, the furnace will not continue in the starting sequence because the sensor/igniter is dirty and needs to be cleaned. Furnace Will Not Turn On? 01 - Blower Motor. Then, let your heating and cooling professional give your furnace a more thorough inspection. Hi there, HVAC! If the heat exchanger overheats due to airflow restriction (caused by that dirty filter), where does the heat go? HVAC contractors are often called to homes only to find that the power breaker needs to be reset. If the switch is on and the furnace still lacks power, check the furnace’s main and secondary electrical panels. We have already addressed what to do if you have a furnace blowing cold air, or when your furnace keeps turning on and off repeatedly in different posts, but in this article we will be addressing what to do if your furnace is not blowing air through your ducts at all. Community content may not be verified or up-to-date. Step One: Check For Electrical Issues. Every furnace has one, and the limit switch plays two roles. It can’t move out of the furnace, which creates a safety hazard. It is the list of basic checks to make before calling for service. To ensure your thermostat is on the right settings, start by: Making sure your thermostat is powered on. If not, go to the next step. Your furnace may not be turning on if your thermostat is on the wrong settings. If your furnace is not turning on, you may have a faulty limit switch. When things go smoothly, you switch over from COOL to HEAT, and the warm air circulates. No power to your furnace: Check the furnace breaker switch at the main breaker panel. Gas Pressure. Thermostat Issue. Nests says heating but warm air is not coming out. Call a licensed HVAC company to tune up the unit, and consider enrolling in an annual maintenance plan to keep your unit as efficient as possible and to save money on additional repairs. If debris (buildup) have accumulated on the pilot, the furnace likely needs additional maintenance. We’ll start with the most logical and easiest to fix and then move on to a few more complex issues that may require home furnace repair. Any obstruction in the vents will result in malfunctioning and heating of the furnace. As a result, start by checking to see if your furnace is receiving power. If you find the source of the power surges, address it. You might save yourself the expense of a service call. Often, newer electronic thermostats will display an error code if something is wrong. I have an oil burning furnace about 10 years old. When the furnace won’t turn on, and you know you’ve changed the filter, your thermostat could be the problem. However, there are other issues that can cause a furnace to not start up, things which, if you know what to look for, you can fix yourself. If the furnace starts, great. If the fuse is blown, replace it. 2. Did the power go off through the entire building? At Jerry’s Heating and Cooling LLC, Since 1991, We have been Committed to Excellence in our Trade and Complete Customer Satisfaction of Our Services. You should check filters every 30 days, however, to make sure they have not accumulated too must dust. To understand why you’ll need to grasp the role the filter plays in keeping your furnace running. Many people neglect to replace their furnace filters. It is possible someone (accidently) changed the settings. A furnace could potentially not turn off for a few different reasons. Try to turn it back on and rerun it. If the breaker is flipped, that means your furnace could have overloaded your outlet. Common solutions for: Goodman Furnace blower not running. Furnace Not Turning On Sometimes a simple reason accounts for the furnace not turning on. The furnace is overheating: All furnaces contain an internal temperature sensor that serves as a safety mechanism. Here’s one more thing to think about when it comes to thermostats. “Gas,” courtesy of Daniel R. Blume. If this is your problem, replace the furnace filter. If you’re considering turning on your heater for the first time since last winter, you’ll want to read today’s post. 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