Even if your system runs on natural gas or oil, it needs electricity to run the mechanical components. There’s nothing as disheartening as a furnace, not turning on when you need warmth. One is to tell the blower fan when to turn on and off. Oftentimes, the furnace doesn’t kick on because the homeowner thought that the valve should only be partially turned for safety reasons. Easy Troubleshooting in 7 Steps. The most common causes of your furnace not turning on or not heating are: 1. It might sound obvious, but make sure your indoor vents are open. Hopefully, by the end you’ll have solved the problem. 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. Try the following troubleshooting steps before calling an HVAC technician. If you turn the furnace on and it trips a circuit again, you have a different type of issue to solve. Your next step should be to check your air filter. Your thermostat is responsible for telling your furnace when to turn on and off. If cleaning the pump does not work, you might have to replace it. CC license. 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. Unscrew and replace any fuses that are blown. If the furnace is working properly, the water will drain out of the pan, or a pump will pull it into a reservoir. If you haven’t updated yours in a few years, why not consider installing one of the new, programmable thermostats? Make sure the thermostat is set to “heat,” and look at the temperature. Here’s one more thing to think about when it comes to thermostats. Furnace Will Not Turn On? Furnace Not Turning On Sometimes a simple reason accounts for the furnace not turning on. 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. If the pan has a drain, check to see if a clog is blocking the drain. Hi All, I have a Lennox Pulse furnace which is over 20 yrs old (just bought the house last year). This water drips down to a pan. Gas Pressure. If the circuit breaker is tripped, turn it all the way off then back on (should hear click). If not, though, just reach out for some help, we’ll be happy to fix your furnace. I checked the main breakers, one of them were tripped. It is important to identify what tripped the circuit tripped circuits breakers and blown fuses mean your electrical system encountered a power surge. 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. For first time homeowners and people who haven’t changed the filter since they moved into the house, you’ll need to figure out where the manufacturer decided to place it. High-efficiency furnaces pull enough heat out of the air that water condenses. Details. You don't want your furnace to accidentally ignite while you're working on it. We’re laughing with you (and at ourselves, too). The switch will look like a light switch. Furnaces don’t work unless you set the thermostat to HEAT. Please don’t continue resetting a tripped breaker. The blower motor blows air through the return vent, past the heat exchanger, and into the home’s venting. If not, go to the next step. All gas appliances are set to operate with a standard supply pressure of approximately 3psi. Wait approximately 30 seconds and then turn the thermostat back on and increase the temperature to the desired level. The team at Jerry’s Heating and Cooling understands how vital a working furnace is when the temperature drops. On a forced-air furnace, the limit switch, when it works correctly, shuts off the gas supply to the furnace burners. If the breaker is flipped, that means your furnace could have overloaded your outlet. If you’re intent on spending a cozy evening at home, schedule an appointment with a qualified home furnace repair company. A faulty ignitor makes it nearly impossible for a furnace to turn on. Some of the most common explanations include: Troubles with your thermostat. The first thing you’ll want to check is your … 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. Newer gas heaters use an electric ignitor, which lights the furnace. 2) Turn back on the power switch and gas. Open the electrical panel and look for a tripped breaker. Turn any breaker that is in the "Off" position to the "On" position. After months of not being in use, various components of your furnace can fall into disrepair. Posted by. 3 Be sure the furnace’s power switch is turned on. When the pilot light is on, slowly turn the screw until the flame is a consistent 1½ to 2 in. Furnace Will Not Turn On? 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. If after you’ve performed all the diagnostics your furnace still won’t kick on, then you’ll want to call a professional. This can cause your furnace to turn off as a safety feature (to prevent overheating). I have a air ease johnson furnace it was working this morning and when I came home it was not working down to below 60 degrees, the pilot light is on but its like no power getting to it we popped the breaker switch it to manual nothing seems to help. If resetting the breaker works, you’re back in business. If the breaker has been tripped, try switching it back on. If you own a digital or programmable thermostat, you might have another problem — the power. 1. Before you do anything else, make sure you have electricity going to the furnace. The furnace is overheating: All furnaces contain an internal temperature sensor that serves as a safety mechanism. If the furnace keeps cycling on and off despite the temperature meeting then there is some problem with the furnace functioning. If power is getting to the blower motor, but the motor does not run, the motor may be burned out. Many people neglect to replace their furnace filters. Check for the furnace box, see if there is anything that is blocking the furnace vents. Common solutions for: Goodman Furnace blower not running. It can’t move out of the furnace, which creates a safety hazard. At this point, check the fuse box/circuit breaker. 3) Adjust the flame using your furnace’s pilot light screw (if needed). If the furnace is not on a dedicated circuit, another appliance might have caused the power surge that tripped the furnace’s breaker. I put it back to position but it didn't help. The LED indicator light is not on and the furnace/burner/motor is not on. It's less - Answered by a verified HVAC Technician A furnace could potentially not turn off for a few different reasons. 01 - Blower Motor. If you have an older furnace with a pilot light, it is possible the flame might have gone out. People sometimes turn off these switches accidentally. Then, let your heating and cooling professional give your furnace a more thorough inspection. Batteries in these units typically need replaced every couple of years. Nest Wifi, Google Nest Device. To prevent this issue, clean off the burners before turning your furnace on for the first time of the season. Do a thorough job, but be careful not to break anything. HVAC contractors are often called to homes only to find that the power breaker needs to be reset. The furnace should start within five minutes. If it will not stay lit, however, turn off the furnace’s power and gas supply and try the following. Anytime you're performing work on a device that requires electricity, you should turn off the power to the device. It’s better if you know where to find and how to change your furnace filter before things go awry. 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. If the heat exchanger overheats due to airflow restriction (caused by that dirty filter), where does the heat go? 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