Fuses are very sensitive to overload, and so they overheat extremely fast. I replaced it during the day time (indoor temperature was about 68 and the outdoor temparature was maybe 60), I set the thermostat to 70 and the heating worked fine during the day. Wear and tear will eventually take its toll on sensitive HVAC components, causing them to break down and blow the fuse. Just because your equipment is functioning properly now doesn’t necessarily mean major issues won’t present themselves when temperatures are at their lowest. Why Air conditioner Keeps Blowing Fuse In Circuit Board? You need to find the root cause of the blown fuse on the furnace … If you fix the fuse once and it immediately blows again, you have a much larger problem on your hands that seriously needs to be addressed. A couple of days ago, I went to turn the heat on and my old programmable thermostat was dark and not working. While a fuse blowing or breaker tripping might not seem like a big deal, other then the annoyance of having to fix it over and over, often there are reasons behind why an HVAC system or a furnace keeps blowing its fuses and tripping your breaker. This will, in turn, break the electrical connection and cause the unit to fail. This is dangerous for your furnace because the motor can overheat and burn out. It’s recommended that you schedule an inspection at least once a year, ideally in the spring or fall. What are the usual culprits behind a blown furnace or heat pump fuse? A blown furnace or heat pump fuse is the last thing anyone wants in the middle of winter. If Your Furnace Is Leaking Water in the Winter, Here’s What to Do, HVAC Talk: How Heating & Cooling Systems Differ by Region, Why Your Furnace Is Making a Clicking Noise, What to Do if You Lose Heat in the Middle of Winter. However, if you have pets or household members with allergies, you need to replace the filters at least once every two to three months. Allison Air Conditioning has been offering professional HVAC and furnace services to local residents for over three decades. Why Your Furnace Keeps Blowing Its Fuse February 2, 2021 by Thomas Fannon Leave a Comment It’s a good idea to hire a professional to perform regular maintenance on your furnace and water heater , particularly before the start of winter every year. If the wires are loose or poorly connected, it will cause your furnace to short circuit. The valves, blower motor, transformer and starting capacitor are worth checking if your furnace stops working. Allison Air Conditioning, your trusted heating and air conditioning service contractor, lists them here. Instead, call a professional to fix your furnace. [HVAC] Fuse keeps blowing mysteriously after thermostat install! Well, the fuse blew. Fuses … The transformer of a furnace helps to convert the electrical signals to the right voltage. HVAC contractor Allison Air Conditioning lists them here. … Every furnace circuit board has an inducer and if it is faulty it can cause a fuse to keep blow continuously. While replacing the fuse in the unit’s fuse panel or resetting the breaker can be a temporary fix, the fuse will keep blowing if the underlying issues aren’t taken care of properly. Poor airflow and overvoltages. Any malfunctioning of the furnace should be inspected by a professional technician. Concerned about the air you breathe in your home everyday? If fuse does not blow then you have a short in the wiring feeding the furnace.. You didn't by chance connect your battery up incorrectly? Having issues with a furnace system that flips your breaker or blows fuses? Electrical shorts. Regularly tripping the fuse can be a fire risk because it indicates an electrical problem. Wrapping It Up: Final Thoughts on Why a Furnace Keeps Blowing Fuses . Office Hours: Common Reasons Your AC Fuses Keep Blowing. © 2021. Loose wires. If you haven’t been diligent about maintaining your furnace, all its parts will have been silently and steadily collecting debris and dust. I removed all the wires going to my thermostat and it would not blow the fuse when powered on. It makes this easy to install, and you can normally buy this from one of the local suppliers. The fuse is the incorrect amperage rating Check what devices or lights are on that circuit, as it may be the case that a new amplifier pulls too much power, causing the fuse to blow.The more devices there are on one circuit, the heavier the amp load. Required fields are marked *, -- I'm Interested In --HeatingCoolingWater HeaterFuel Oil. Loose electrical wiring. I turned off the input power and attached terminal R (24 VAC power to thermostat) and the fuse blew. I am still popping fuses and reading over 24 volts. There are a number of fuses located throughout your furnace. Thomas J. Fannon & Sons is committed to quality so expect only the best HVAC services when you work with us. Replacing the fuse or resetting the breaker can temporarily fix the problem, but if the underlying issue is not fixed, the fuse will just blow again. Your furnace has a system of wires. 369 E. Harrison St., Corona, CA 92879 As a rule, if your heat pump or furnace keeps experiencing the same issue over and over again, you should have an electrical technician or heating repair contractor inspect it. Allison Air Conditioning, Ways to Keep Winter Allergy Symptoms Under Control, Why Heat Pumps Run Constantly in the Winter, How Your Heat Pump Cools & Heats Your Home. The air filter will get inundated with grime, which can then transfer to the blower motor. If it did blow, it meant the control board was bad. Ensure the power works through the switch, breaker, fuse and indicator light. If fuse blows with nothing but the transformer wires to board then board is shorted and will need to be replaced. Inspecting the wiring in your home is the best method for discovering if this is the cause of your issues. Click to see full answer. It’s possible that the problem could turn out to be with your electrical system rather than the furnace itself, but your HVAC system is the … Here are some of the things that you should keep in mind with Goodman furnace troubleshooting issues: Examine the settings on the thermostat. Dirt on sensitive furnace or heat pump components. If the refrigerant level is low, your AC system has to work harder. Call us today at (703) 549-5700 or tell us about your cooling or heating concerns here. So I bought a couple fancy new wifi enabled thermostats for my house recently and screwed up installing one of them. It’s a good idea to hire a professional to perform regular maintenance on your furnace and water heater, particularly before the start of winter every year. I replaced the battery, but nothing happened. Monday – Friday : 8:00 a.m. – 5:00 p.m. All Rights Reserved. We will start by disconnecting the components like limits, pressure switches etc and making sure fuse does not blow with just the board connected to the 24v from transformer. Check the transformer for any faults. In case the transformer fails to do so, it may blow up. If fuse blows on the temporary wiring then you have a SHORT IN THE FURNACE. All Rights Reserved. The voltage out of the transformer reads 26.3 volts. I was blowing the 5 Amp fuse on the control board for my forced air gas furnace. The Furnace Fuse Keeps Blowing. The cold is seriously starting to settle in here in Northern Virginia, and odds are you’re already in need of quality heating. Zoned HVAC: Is It the Best Choice for Your Comfort Needs. All of the fuses are important, but because there are so many of them, it is inevitable that you will occasionally have to deal with a blown fuse. To keep your family safe and warm, and to stop fuses from blowing, replace your furnace’s air filter regularly, and have one of our courteous technicians come clean out your furnace at least once each year. Your email address will not be published. Some of the most common problems are: Low refrigerant.