Most of the time the problem ends up blowing the fuse on the control board, (if your control board has a fuse) instead of the transformer. Ensure the happiness of your system and you will be the one smiling. That’s dangerous. I have a Trane XR90 furnace. Loose wires, in general, are often responsible for blown fuses. The first time it blew, the technician replaced the fuse and the system still wouldn't start. I have checked to see if the reversing valve or contactor are shorted and everything seems fine. When the high limit becomes coated with soot and debris, the connection will break and the limit will fail. Many times the thermostat wires will short out against the body of the furnace or air conditioner. An occasional blown fuse is nothing more than a mild inconvenience, but in cases where fuses are frequently blowing, this is a warning signal that something is wrong with your system. If this is the case, you are doing something wrong when you are connecting the stat. This video shows specific repair for this particular problem of this furnace and should be used as reference only. 1 Posts . I am still popping fuses and reading over 24 volts. Viewed 21k times 0. While there are a number of problems that can lead to this trouble, you need to get to the bottom of the problem quickly to determine if your furnace needs to be replaced. Well, almost. Call 952 767 7682 to speak with us directly or fill out the form below to schedule an appointment. Now, on the new stat wire, disconnect the Stat completely. Does the fuse now hold. Something not working? Furnace control board fuse keeps blowing [ 1 Answers ] Hi, I have a Carrier furnace 48GS-036090311TP with a Honeywell T8401C thermostat. Call us today at 877-591-7508 or contact us online to get fast answers to your furnace fuse problems. Breakers and fuses are designed to trip or blow when too much voltage is sent through the line. We have One Day Installation and No-Stress Guarantees to prove it. 5A fuse keeps blowing. If your furnace keeps blowing a fuse, the team at T.E. Accumulation of Dirt and Debris: If you have not paid any heed to the maintenance of your furnace, the various parts are likely to collect dust. In this case, you will need a technician to come and replace the old transformer with a new one. We’ll make you MVP and all it takes is one not-so-big play. Use it with your own risk. A well-maintained system is an efficient and long-lasting system. Can you help? 3A Fuse on Circuit Board Keeps Blowing. When the high limit becomes coated with soot and debris, the connection will break and the limit will fail. Now at the stat location twist together the red and the white. any suggestions on what i might look for now? Most of us are in the thick of winter already, which means if your furnace hasn’t failed you yet, you’re in the clear, right? The IFC board went out 2 winters ago. It has worked fine until 2 days ago. Wait a few minutes, then restart. We’ll get you back to perfect comfort – and we’ll do it Pronto. These could include the following and may be indicated by strange noises emanating from your furnace: If you suspect any of the parts above may be to blame, be sure to contact an HVAC professional, like Pronto, for immediate assistance. I reset it the blower used to come on until furnace would try to start then fuse would blow. Then prepare your speech. 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. | Sitemap | Privacy Policy, Serving All of Lackawanna, Wayne, Luzerne, and Susquehanna Counties, We Are Prepared to Serve You With COVID-19 Protocols - Click Here. The most logical cause of your air conditioner tripping a breaker or blowing a fuse when it comes on stems from a problem with the electrical connection, the power supply, or the circuit that powers the system. To prevent this happening, have your furnace regularly maintained and cleaned. 3. This is usually a good place to start looking for problems with your furnace as loose wires can usually be detected with a voltage meter. The 3A fuse on a furnace circuit board can keeps blowing because of a faulty transformer or damaged thermostat wiring. If the fuse doesn't blow, reconnect one thing (like the igniter) and try again. Why does the transformer burn up, about 2 minutes after i turn on the power to the furnace? Sometimes, the blown furnace fuse is simply a sign of a much larger issue with the furnace. Spall for the past 10 years is the reason why we chose no other company. Happy hunting and Good Luck. Fill out the form below to enroll. If it still blows with all the thermostat wires disconnected you know the problem is in the furnace and we can go from there. 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. When your furnace keeps blowing a fuse, you need to take action quickly. As a result, the high limit fails and causes the transformer to blow … Our expert technicians can come to your northeastern PA home to find the source of your problem and provide effective solutions. Twice in less than a 12 hour period, my Carrier 58CVA furnace blew the 3 amp fuse in the control board. But for those who’ve recently encountered one common issue – a furnace blowing its fuse – before scheduling that tune-up, it may be due to one or more of the following reasons: If you haven’t been diligent about maintaining your furnace, all its parts will have been silently and steadily collecting debris and dust. 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. Why Does My Furnace Keep Blowing the Fuse? ©2021 Pronto Heating and Air Conditioning, Inc. Tell us where, when, and why – and we’ll be there Pronto. Wrapping It Up: Final Thoughts on Why a Furnace Keeps Blowing Fuses . We can help you save energy, money and headaches. The 5 amp fuse in the air handler keeps blowing when the therm. 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 most likely suspect, so it makes sense to start there. And absolutely nothing should stand in your way of getting exactly that. Sometimes the blown fuse in the furnace comes from a malfunctioning transformer. If a wire becomes loose, it can cause a short. Just keep an eye on your furnace. Spall & Son today for help. In most cases the thermostat wires have shorted out somewhere and the thermostat wires are the problem. The main reasons for a transformer to blow in a furnace are loose wiring, the accumulation of dust, and worn out components. Fill out the form below to stop worrying about buying new filters once and for all. The sequence is like this: 1. Blowing the famous 3 amp control power fuse on air handler control board Well I've looked and can't seem to find the answer I'm in search of so here goes. The Lil Popper allows you to manually reset the fuse instead of replacing a fuse … If the fuse keeps popping in your air conditioner, you have a 24 volt short. To protect your family and ensure your furnace keeps working as it should, you need to find the source of the problem. If the fuse in your furnace is too small and cannot handle the wattage, it can cause your fuse to blow. Contact T.E. The cold is seriously starting to settle in here in Northern Virginia, and odds are you’re already in need of quality heating. If so, your blower may keep circulating cold air even after the burners fail to light and produce heat. The wires leading from the thermostat to the furnace show … 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. A faulty transformer or a malfunctioning thermostat wire can all be common culprits for fuses that continue to blow. Or, just not working right? Now turn on the thermostat. Ask Question Asked 3 years, 8 months ago. I do not know if the fuse blew during operation, shutdown, or when the next request for cool happened. If your thermostat wire touches the metal frame of the furnace, this can cause a blown fuse. You can also call us at 877-591-7508! … Regular furnace maintenance is crucial to adequately maintaining your system and saving big money in the long haul (which makes a furnace tune-up well worth it if you haven’t done so this season!). or fill out the form below to schedule an appointment. So, if the problem cannot be repaired, we can install a new, properly functioning furnace. To prevent this happening, have your furnace regularly maintained and cleaned. As the title states, I have a blown 3 amp fuse on the control board located in the air handler. © 2021 Copyright T.E. Since some furnaces can require a lot of electricity, homeowners must ensure that they have an adequate electrical system to support the furnace. Cookies were delicious!! This … They show open when disconnected and 20.8 ohms when connected to the contactor. I have … Nothing gets turned on at the thermostat. furnace system regularly inspected and tuned up by Pronto, strange noises emanating from your furnace. Thanks, gns 05-24-2006, 03:39 PM #2. t527ed . Having issues with a furnace system that flips your breaker or blows fuses? He then determined it blew my Carrier Thermidistat. (And just in case the unthinkable does happen, rest easy – Pronto is available 365 days a year, including nights and weekends, for same day furnace repair! 4.8 stars from 117 reviews. Whether it is a case of faulty wiring, issues with a gas valve, a dirty air filter, or moisture in your furnace, … When a thermostat wire touches the metal frame of the furnace, it can deliver more voltage than the wires are designed to handle. First thing I did Locating, fixing or replacing loose wiring is difficult to do by yourself. If your furnace is blowing a fuse repeatedly, leaving you with no power to the furnace, your first step should be to call in an experienced HVAC repair professional. When your furnace keeps blowing a fuse, you need to take action quickly. Active 1 year, 1 month ago. Tell us what, why, where, and when – then we’ll be there Pronto. I have seen other components inside the air conditioning system with coils and electronics cause the transformer to burn up. If this is your problem, simply replace the fuse with a larger capacity fuse that can handle the electrical demands. Don’t let electrical problems keep you from enjoying your furnace to the fullest. Broken systems are never good. This can cause the motor to overheat and burn out, which can cause the high limit to fail. ), 7415 Cahill Rd  |  Edina  |  MN  |  55439. Sometimes, your furnace may seem like it has blown a fuse, but it is actually suffering from loose wire connections. all info is required to better serve you. If you have a newer furnace with an electronic control panel, you may need to reset the system. Everything OK? Pay close attention to where the thermostat wires where the wires go through the body of the furnace or air conditioning unit. If loose wires are detected, they should be repaired or replaced by an electrical or HVAC technician. Why does the transformer on my furnace keep burning up? Over time, grime from the air filter can migrate to the blower motor. If you have an oil-fired furnace, you may be out of fuel. View Profile View Forum Posts View Forum Threads … Blowing Low Voltage Fuse Breaker Trip | Control Wiring Troubleshooting - I’ve got a 5 amp fuse that keeps popping on a circuit board. If fuse blows with nothing but the transformer wires to … After resetting the circuit breaker and replacing the fuse, if the fuse keeps blowing, there might be an electrical short in the electrical system that supplies the electricity to the furnace. The furnace should start. It was replaced along with the ignitor electrode. I checked and the furnace was off, fuse blown and thermostat was asking for cool. Problem with computerized controls. Every furnace circuit board has an inducer and if it is faulty it can cause a fuse to keep blow continuously. Spall & Son is ready to help. Gas and Oil Home Heating Furnaces - Trane XB80 furnace: Blowing circuit board fuse - Hello, I have a approximately 8 year old trane xb80 propane furnace that quit working last night. Spall & Son. I just plug it in and push in the blower door switch and it burns up. I know after a lightning strike I … We’ve been serving the Northeastern Pennsylvania area for over two decades, and we offer comprehensive furnace repair and replacement services in Carbondale, Scranton, and Wilkes-Barre, PA. Our NATE-certified technicians understand the importance of safety for your furnace, and we will quickly diagnose and repair the solution—or suggest the right furnace for replacement. Once the dust reaches the blower motor, the motor starts overheating and burning out. Trying to fix a furnace yourself can be frustrating, especially if problems occur during the winter when you need heat most. If your furnace keeps blowing a fuse, it is important to act quickly to find out what the problem is and to get it taken care of as quickly as possible. I turned my heat on 3 days ago and everything … Repeat until something blows the fuse. In this case, you should call an electrician. Try turning the furnace off via the power switch. The most common problems are: An overloaded furnace; An overloaded shared circuit; Short circuit or ground fault inside your furnace; Circuit breaker problems ; But first, do not keep resetting a tripping breaker. Now fuse blows from the start Over time, grime from the air filter can migrate to the blower motor. The team at T.E. You’re either sweating, freezing or flooding. This will blow the fuse on the control board, causing the draft inducer to not start, which then stops the rest of the furnace functions from working properly. 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