- To replace a blown fuse in your home, cut power off from your circuit breaker and unscrew the broken fuse. Then, screw a new fuse of the same amperage into the socket.
- To replace a blown fuse in your car, disconnect the battery and remove the blown fuse. Then, take a new one of the same amperage and push it gently back into place.
How to Fix a Blown Fuse in Your Home
Locate your home’s circuit breaker. Your home’s circuit breaker, or service panel, is easily identifiable. Look for a gray steel box with a hinged door. It will either be placed directly into your wall or secured to it. They’re typically located in the basement, however, for homes without one, you can find it in your utility room or garage.
Unplug electrical appliances and turn off power. Before engaging in any electrical work, first unplug any appliances and shut the power off. This is so you don’t accidentally touch exposed wires or other components that can shock or electrocute you. To avoid injury, use extreme caution. For modern homes, switch the circuit breaker in the main service panel to the “off” position. Homes built before 1960 will operate on a fuse panel. To cut power off from the entire house or individual circuits, pull the small metal handle connected to the main or individual fuse blocks.
Grab your safety gear. While you don’t need to dress head-to-toe in protective gear, it’s always better to be safe than sorry. It only takes 500 volts to cause serious damage to your body. At minimal, put on a pair of electric insulated gloves to keep your fingers safe from unexpected shock or burns.
Identify the blown fuse. Every circuit breaker panel comes with steel stamped numbers and a paper glued to the back of the panel door. This helps you match individual breakers to specific circuits. For example, if you’ve blown an outlet in the bathroom, you’ll need to find the “Bathroom outlets” breaker. Once you’ve narrowed down your search, look for a fuse with discoloration, cracks, or scorches.
Replace the blown fuse. Unscrew the fuse by twisting it out of its socket, touching only its face. You can also use a fuse puller if you’re experiencing difficulty. Remove it completely from its socket, making sure to avoid touching the metal threaded base of the fuse. Replace the damaged fuse with a replacement fuse of the same amperage. Each fuse or circuit breaker should have its amperage marked on the handle. In the United States, most homes are wired with 15-amp or 20-amp fuses. On average, an individual fuse can run you between $3 to $15.
Reset your circuit breaker. Flip the breaker you’ve just replaced back to the “on” position. Return to where you originally lost power and turn on a light fixture or appliance to make sure the circuit has power. If you follow all these steps, your power should be back on track!
Call an electrician if your circuit still trips. If you find that power is not resuming or the circuit trips shortly after being restored, it’s time for a helping hand. A professional fuse replacement service can run anywhere between $400 to $2,000 in the United States.
How to Fix a Blown Fuse in Your Car
Turn off the engine and disconnect your battery. Safety always comes first. To avoid potential mishap or injury, keep your vehicle powered off. Then, raise your vehicle’s hood and locate its battery. If you’re struggling to find it, refer to your owner’s manual for its exact location. To disconnect your car battery, first locate the positive (+) and negative (-) terminals on either side of the battery. In some cases, the terminals may be covered with a plastic cap. Simply remove these with your fingers. Grab a 10-millimeter open-end wrench or socket wrench to unbolt the battery cables. Begin by unbolting the negative battery cable. Once it’s loose, you’ll be able to disconnect the cable by lifting it free. Push the cable far out of the way before proceeding to unbolt the positive cable next.
Locate the fuse panel. In most vehicles, there will be two fuse panels. One located on the driver’s side of the dashboard, beneath the steering wheel or one under the front hood. Refer to your vehicle’s owner’s manual to be sure. Once you know where the fuse panel is, remove its cover to find several rows of color-coded fuses. The backside of the cover will show a diagram of which fuse belongs to specific electrical components. For example, one fuse will be assigned to your dashboard lights. If you do not have an owner’s manual, contact your local dealership or search online for more information.
Pinpoint the blown fuse. If you suspect a fuse is blown in your car, it’s likely you’re experiencing a malfunction like your radio or power outlets won’t work. Refer to the backside cover of your fuse panel and look for the correct color-coded or numbered fuse. For example, for a faulty radio you’ll look for the fuse that’s assigned to the radio.
Remove the blown fuse. Most vehicles already come with a small fuse puller for safe removal. However, if you do not have one carefully remove the fuse with your fingers, pliers, or a screwdriver. Use the tool to grip the fuse firmly and pull straight out.
Look for a slight split in the fuse’s wire. Take a light to the fuse in question and look for a metal wire inside. If you notice a small split in the wire, that means the fuse has blown.
Replace the fuse with the same amperage rating. Each color-coded fuse has an amperage rating written on it. You must use a replacement fuse that has the same amperage. Otherwise, it’s likely it will blow again. When you have the right fuse, gently push it into the correct slot and put the panel cover back in place.
Reconnect the battery and start your vehicle. Once you’re done replacing the fuse, it’s safe to reconnect the positive (+) and negative (-) cables. With everything back in place, turn the ignition. If it’s working, you just had a temporary power surge that blew the fuse.
Take your car to an auto mechanic if replacing the fuse doesn't fix the issue. Also, see a mechanic if the fuse blows again. Expect to pay anywhere from $88-$111 for a diagnosis. An electrical repair can run anywhere between $1,300-$2,000. However, prices will vary depending on the make, model, and year of your vehicle.
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