Here Is Why Dryer Keeps Blowing Thermal Fuse
You hear a pop and all the power goes out. Everyone says, "Probably a blown fuse," but what does that even mean and what causes it? Find out here. Most people probably have experienced a blown fuse at one time or another. Someone always knows what to do when this happens. Blown fuses are a common occurrence. Most people nowadays have had the old-fashioned fuse panels also known as fuse boxes in their homes replaced by modern electrical panels with circuit breakers—if the fuse boxes were even still there when they purchased their houses.
You might be wondering, then, how to tell if a fuse is blown—an actual fuse, that is. You will see that the fuse has melted, and there might be charring on the panel. A true fuse typically consists of a piece of metal, most commonly an encased wire, that actually melts when overheated.
The destroyed fuse must then be replaced with a new one. Circuit breakers, on the other hand, have internal switches that are tripped by electrical surges to temporarily disable a given circuit. A short circuit is a type of electrical fault. Faults, in general, occur when an electrical current strays beyond its intended path circuit due to a lack of resistance e.
The result is a weak connection between the two conductors supplying electrical power to the circuit. Overloaded wires will overflow and cause damage. A short circuit might even cause the electrical device responsible for it to be destroyed. Short circuits are typically stopped by circuit breakers, though, hence their name.Temblores en el ano
First, test the circuit. Then check for any damage on or around the electrical panel. If you see any damage, call an electrician before doing anything else with it. If there is none, flip the breaker switch back to its operating position. If it trips again, though, call an electrician. A ground fault is a specific type of short circuit in which the unintentional pathway of the straying electrical current flows directly to the earth ground or touches a grounded part of the system such as a grounding wire or the electric box.
The danger of shock increases when a person is in direct contact with the weak path to the ground. Be sure and test all affected system components and electrical devices.
Call an electrician if something is still amiss. Arc faults result from problems with wiring and terminal connections—for example, a loose terminal screw.A thermal fuse is a small device - just an inch or two long - that plays a critical role in preventing fires.
Federal law mandates the inclusion of a thermal fuse on all dryers manufactured since the s. A thermal fuse operates if dryer exhaust temperatures climb too high. The fuse shuts off the dryer or its components if this happens. A thermal fuse only works one time. If it triggers during a high-exhaust temperature event, the fuse must be replaced. Many dryers simply will not run once a thermal fuse triggers.
On other models, the drum continues to turn and the dryer operates, but the heating element does not. Clothes come out of the dryer wet once the appliance completes its drying cycle.Download airac 1907
Manufacturers are not consistent from model to model, even within the same brand. Typically, you must remove the back panel of a dryer to access the fuse. Ensure to shut off electrical power to the dryer before attempting to locate and troubleshoot the fuse. Most dryers plug into a volt wall outlet, so you can unplug the unit to cut off power. Thermal fuse shapes and sizes vary. Some are made from plastic; others are metal.
Look for a small device about the size of a quarter to about 2 inches long, mounted directly on top of the exhaust duct. A thermal fuse has two wires connected to it. A reliable method for testing whether a thermal fuse has burned out is to temporarily bypass the device. However, it is tempting to operate the dryer this way, or forget to replace the fuse once the dryer is running.
Bypassing the fuse is only a quick means of detecting whether the fuse is bad. It is not a permanent fix. Disconnect the two wires from the fuse and tie them together with a jumper wire, then turn on the dryer. If it runs and heats, the thermal fuse burned out and must be replaced. A better, faster means of testing requires an electrical multitester set at its lowest RX setting. Remove the two wire leads from the thermal fuse and touch a multitester probe to each wire terminal on the fuse.
If you get a reading of infinity, the fuse is fine. Any reading less than infinity indicates a triggered thermal fuse you will need to replace. Replace the fuse with an exact match for your dryer make and model. Then check the dryer for a reason why the fuse burned out. Sometimes, age wears out a fuse, but other times something else failed and caused exhaust temperatures to rise.
Ensure the power is still off before troubleshooting, then examine the exhaust duct for obstructions that limited air flow. You may also want to replace the dryer cycling thermostat along with the thermal fuse.
If this thermostat fails, it will likely trigger the thermal fuse. Robert Korpella has been writing professionally since He is a certified Master Naturalist, regularly monitors stream water quality and is the editor of freshare.
Korpella's work has appeared in a variety of publications.Dryer heater won't cycle on and off. Vents are clear because I can feel cold air from outside when dryer is off.
I've also inspected ducts. Can a damaged blower wheel cause the cycling thermostat to fail or the thermal fuse to blow? Or both? If the heating element is not glowing evenly could that cause the high limit thermostat to trip before the temperature control thermostat? So, possibly there's a multitude of other problems and other conclusions why it's not allowing power to get to the element.
Tengo una secadora marca General Electric,que corta el secadomuy frecuente y no calien. Okay, same problem here. Replaced the thermostat 2 times, the thermoster, and the heating coil, good airflow. Drum apins, Dryer will dry about 3 loads then stop heating works otherwise, just won't heat. Does throw any codes. Any thoughts?
Why does my dryer keep blowing thermal fuses.
February 20 by Scott Priester. Show 7 more comments. Thank you all for your suggestions. It was the blower wheel that was the problem. I replaced it, and everything is back to normal. Thanks again. Just wanted to askI noticed the heater is still on after the cycle ends.
That is why my fuse are burn all the time. Every time I have to pull the plug off the wall. Your heating element is grounded out.
Repair or replace the heating element. Some part of it is touching the heater housing. What was the issue with the blower wheel exactly?The Mustachian Forum.
Welcome, Guest. Please login or register. Did you miss your activation email? Home Help Search Login Register. Author Topic: Thermal fuse in dryer keeps blowing - cause? Read times. Hello, Mustachians! Our Whirlpool Cabrio dryer stopped working and we had a Sears tech look at it. He plugged in his little computer and determined the thermal fuse had blown.
He replaced it and the dryer worked for 2 days and did the same thing. We put in another thermal fuse, the dryer worked for 3 loads, then stopped again. What is the root of the problem??? Can I fix it? The Sears work is under warranty we won't tell them we put in another fuse ; but the techs suck and won't come out again until mid-December. Spork Walrus Stache Posts: I am taking a big WAG.
I'd start at the back of the dryer and make sure it is clean all the way to wherever it exits your house. Again, I'm just guessing The reason the fuse blew should be fixed before you replace it again.
The ducting could be blocked as Spork suggests, or the motor is going bad or you're overloading it and creating too much of a draw, something. Quote from: worldstrad on November 29,AM. Just make sure you're clear that the fuse is not a problem -- it is a symptom of another problem.
Fuses are protective devices, installed to protect more expensive equipment. Quote from: worldstrad on December 01,PM. I had to replace the heating element in our dryer and I found repairclinic. Their prices for replacement parts seemed to be pretty good, and the kicker was that they actually had the service manual for our dryer. Since the job involved extensive disassembly, I didn't want to be without the diagrams and step-by-step instructions.
They even have video tutorials for many jobs. They allow returns for up to a full year so I just sent back the stuff I didn't end up needing. SMF 2.Dryers have included thermal cutoff devices since the s as a required safety measure.
They are basically fuses that react to excessive temperature -- not electrical current -- but they shut off electrical power when they blow. When a thermal cutoff blows, you have to replace it to get the dryer working again. If the new one also blows, you need to troubleshoot the cause of the excessive heat before you install another one.
The thermal cutoff isn't the same as a thermal fuse. The fuse controls the dryer's heating element whereas the cutoff controls the motor. When the fuse blows, the dryer won't get hot, but when the cutoff blows, the tumbler won't spin. The location of the cutoff varies according to dryer model, but it's usually attached to the dryer housing.
It monitors the temperature inside the housing, and when that temperature exceeds its limit, it melts, thereby opening the circuit to the motor. Since it only responds to temperature, its failure usually doesn't signify an electrical problem. A number of components inside the dryer can cause overheating.
The first and most obvious is the heating element itself. If it has shorted, it may stay on even when the cycling thermostat turns it off. A visual inspection may reveal that it's touching some part of the assembly casing, but if not, you should unplug the dryer, remove the heater assembly and test it for continuity with an ohmmeter.
If the meter indicates very low or no resistance, the element is defective, and you should replace it. The fact that there is too much heat in the housing suggests the possibility that the blower, which pushes hot air through the exhaust, is broken. If this is true, you won't feel much air coming from the vent outlet. A defective cycling thermostat can also cause the dryer to overheat if it doesn't turn off the heat at the proper temperature.
If it isn't working, a continuity test will reveal infinite resistance.
A third possible cause of overheating is worn felt seals on the front and back of the drum. They allow hot air to escape, forcing the heating element to stay on. The number one cause of dryer overheating is poor venting, and while it may be caused by a defective blower motor, it's more often the result of a clogged lint filter or lint-clogged vents. You're especially likely to have clogged vents if your pipes are made with corrugated metal or worse, plastic.Jenkins email trigger
If the vents are clogged, air can't circulate properly through the dryer, and if the cutoff didn't blow, you could have a dryer fire, just as 2, homeowners do each year, according to the Federal Emergency Management Agency. Regularly cleaning your vents to remove lint buildup is an important part of dryer maintenance. Chris Deziel has a bachelor's degree in physics and a master's degree in humanities. Besides having an abiding interest in popular science, Deziel has been active in the building and home design trades since As a landscape builder, he helped establish two gardening companies.
By Chris Deziel Updated December 14, About the Author.Dryers have many parts that can go bad. Two such part are the thermal limit fuse and the thermal cutoff. However, thanks to these components, this is a thing of the past, as both parts work to prevent fires.
It monitors the temperature of the dryer, and when that temperature gets too high, it shuts power off to the motor not to the heating element!!!
Diagnosing a tripped thermal fuse is easy. You just need to have a multimeter and check continuity between two contacts. But first, turn the dryer V power cord OFF from the wall and only then start to work on the dryer. Another common reason for Whirlpool and Maytag dryers, that this particular thermal fuse keeps tripping is due to a failed relay on the control board. This will cause the control board to constantly send power to the heating element while dryer running. It will not send the power if the dryer is not running!!!
When the critical temperature is reached, the thermal fuse blows. Usually, this is happening at the end, when the dryer goes to the Cool Down cycle.
Click Here. Once such place it can end up is wrapped around the thermal fuse inside the blower wheel. To make it easier to locate, keep in mind that the blower fan is attached to the drive shaft motor. The thermal cutoff is located on the heater assembly and it controls the temperature of the dryer.
It also helps monitor the amount of heat being produced by the dryer. You may also notice that your dryer is producing a small amount of heat, but not enough to dry your clothes in a timely manner. You can troubleshoot the thermal cutoff by testing it for electrical continuity. When dryer hoses or vent lines become clogged it prevents proper air circulation, which will eventually cause your dryer to overheat. Sometimes you can discover bird nest on the very end of the vent line.
When the coils in the heating element expanding, they can touch metal casing and it can cause the heating element to become grounded. Cycling thermostat just not able to control amount of heat produced by the heating element.
How to Verify the Thermal Fuse Is Burned out on a Dryer
The thermal cut off fuse keeps blowing. I have replaced it twice. Any suggestions on cause?? You have to replace cycling thermostat along with thermal fuse. And also double check vent line from the dryer to outside. Save my name, email, and website in this browser for the next time I comment. This site uses Akismet to reduce spam.
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