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why does a resistor get hot

. Under NO circumstances should you attempt to fix your golf cart on your own. They do make power resistors, google it. That is why it is called a (toaster) , it is encased in the metal box to keep it contained, when the speeds are increased on the foot control, the resistor changes coils, and the only time the resistor is not used is in the high speed. This kind of mechanism has been put together to ensure the safety of the driver and others traveling in the vehicle. There could be a situation when the cart, powered by gas, would start but the starter would fail to withdraw after the engine comes to life. more power! Old batteries tend to lose out on energy comparatively fast. thicker wires have less resistance to current flow than thinner wires), the resistance of a conductor also changes with changing temperature. Loose or corroded cable connections or a faulty controller can also cause the golf cart to not move. If the wires, just like the batteries, are too old, they might have got damaged due to wear and tear. Using Old batteries. Malfunctioning microswitch. Depends. This heat increases the temperature of the material causing faster motion of atoms which will, in turn, more heat with ongoing collisions. I just replaced the 36 v solenoid. (The ignition coil resistor on the 9N/2N is located on the back of the dash above the ammeter.) The main function of a speed sensor is to read the rpm of the motor. Help me solve this sudden new problem. When the speed sensor makes a stuttering sound, you know that there is a problem with it. A speed sensor is usually found at the rear end of the golf cart motor. Second, regarding 6 volt ignition systems converted to 12 volts. A failed blower motor resistor can cause issues with the … A simple answer is because they dissipate power - they have to, because otherwise they wouldn’t be resistors. If you choose a smaller wattage resistor, but still the same ohm resistance, you will be overloading the resistor, and it will likely overheat and fail. If the solenoid heats up too much, the vehicle will not move. For the engine to start, the gear of a golf cart must be in the Park position. It is imperative to check the pack voltage that is present at the two posts surrounding the solenoid. So yes, the resistor does heat up. sigh heat transfer. Explain why the resistors get hot Use ideas about electrons and atoms The answer is only 4 lines, so it isnt that long, help please? Resistors will heat up as they slow down the current running through the circuit. Faulty speed sensor. EZGO Vs Yamaha Golf Carts (The Difference Explained), Why EZGO Golf Cart Won’t Move Forward or Reverse. The ballast resistor is commonly found in older vehicles, because they did not have the benefit of circuit boards found in most of today’s vehicles. Why is my Club Car solenoid resistor getting hot? For a better experience, please enable JavaScript in your browser before proceeding. by any means, typically the power rating of the resistor is the maximum amount of power it can dissipate, and the majority of resisitors are 1/4 or 1/2 watt. This will help in burning up the unburnt oil and all the undesired material that is stuck inside it. Here are a couple of ways to fix a hot club car solenoid coil resistor or speed up a golf cart. A bad solenoid could be one of the possible reasons behind a golf cart not starting. It probably is operating normally as they get quite hot, but check the voltage across it. To my understanding I need to wire my doorbell wiring directly to a 8-24V transformer which has a resistor following their specs. Why is my Club Car solenoid resistor getting hot? If the speed sensor malfunctions, the cart can slow down substantially. I have to respectfully disagree that a ballast resistor has anything to do with it. These motor functions are classified as mechanical, electrical and magnetic. That is what they do. For my transformer I used this product. Ballast Resistor Guide - The electrical system is one of the more complex systems and the more misunderstood, especially by Mopar owners. The first thing you could do while checking the health of the battery is to turn around the connector a couple of times. Sir WBahn sorry for that, by the way thanks a lot. How Much Does a Club Car Golf Cart Weigh? This data or information travels to the speed controller. I'd help you but it is too early for me to get into Re and Nu numbers and such bullshit. If you built the circuit yourself, the first thing to do is to look for short circuits -- if a lead or pin from a discrete component is sticking out, it may be contacting the case; or you could have a solder blob that is connecting two different pins which aren't supposed to be connected. Faulty solenoid. So you can go find a $9.1k\Omega$ resistor rated for 1.5W or more of power dissipation. yes they do get really warm after just a few minutes of running one,but that’s normal,that’s why they are made of porcelain so they can resist high temperature,s it wont hurt it none though,good luck. If the cart happens to be gas-powered, the engine will not start. I have been involved with antique Harley Davidson motorcycles for years and they use a 6-volt, wasted spark system (1 coil, 1 lead for each cylinder). After that, try to start the engine again. You should always size a resistors wattage at 2 to 3 times the actual dissipation.. Is this a new design or something that has been working? I was using Trojan batteries that were around 5 years old. If they are getting very hot to the touch and start to boil or smell then you need to get higher power resistors. If the battery is weak or has not been charged sufficiently, the required voltage amps will not reach the solenoid and it will not function properly. An AC relay, on the other hand, draws a variable current. A Yamaha golf cart is a better option over an EZGO golf cart as it is more power-efficient and has lower maintenance costs. Initially, when it’s open, the inductance is low so the current is high. AC relay? The resistor coil is getting red hot causing a smell in my 1985 EZGO Marathon. The solenoid resistor on a Club Car golf cart can get hot because of a faulty speed sensor, faulty solenoid or by using batteries that are too old. You must identify the issue accurately and then work towards solving it. The information on this website has not been verified for accuracy and should only be used for general information purposes only. When I got them replaced with new ones, I realized the car was moving at a much faster speed. I went ahead and tapped into a junction box which has some 14-2 Wiring - … What causes a blower motor resistor to fail By it’s very nature, resistors resist the flow of electricity, much like a flow restrictor in a pipe. The webmaster of golfstorageguide.com and the author(s) is not responsible for any loss in damages, financial loss, personal injury, or death. Also, remember to switch OFF the engine of the cart before checking the batteries. The golf cart will not move even if one of them is damaged. One of the most common signs of a solenoid malfunctioning is the absence of a click when you operate the accelerator. Defective ignition switch. When the different components come in contact with each other, the engine continues to provide the starter with power even when it is not required. What causes the physical resistance in a dynamo? In that case, you will have to get them replaced. The load resistor is built to dissipate the heat caused by holding back the power and aluminum transfers heat to the air around it very readily. thanks a lot guys for your genuine help and ideas. I am noticing that when I turn the key on in gear I hear a click and the cart slightly lunges. Using weak batteries over a prolonged period can result in long-term issues to the engine of your golf cart. Yes, it is normal for the resistor to get very hot. - Mopar Muscle Magazine The circuit is drawing too much current. The reason that a resistor gets too hot is that you are putting more power into it than it can dissipate at a reasonable temperature. B.T.W How much is too much heat? Faulty speed sensor Using Old batteries Shift the gear to the Park position and the engine will come to life without any difficulty. The reason they get hot is because voltage across the conductive material excites the outer valence electrons of the material, promoting them into higher orbitals and then exchanging electrons from one atom to adjacent atom where they relax to a lower orbital state. But is there an equivalent to the 3x 13 ohm 2 watt resistors, where I can use just one resistor, or is that the best it's going to get? The batteries are made up of corrosive acid and so it would be very dangerous to check them with bare hands. What Causes Tendency To Stare At Bright Lights. Doing so is dangerous and could result in serious bodily harm. How to Fix a Hot Club Car Solenoid Coil Resistor, Common symptoms exhibited by a bad solenoid, How to Fix a Leaning Golf Cart (EZGO/Yamaha/Club Car), Why a Club Car DS/Precedent Solenoid Clicks but Won’t Move, How to Fix Club Car Turn Signal that’s Not Working. At times the solenoid produces a click but the engine does not start. I can then run it, but that is when the coil gets cherry hot. The solenoid resistor on a Club Car golf cart can get hot because of a faulty speed sensor, faulty solenoid or by using batteries that are too old. Without more specifics, that's about as good an answer as you can hope for. An issue with the ignition is one of the most likely things that prevent the engine from starting. If the wiring is loose, a technician can fix it quickly. Congested Muffler. Its a circuit question on a test im doing for homework. A normal club car in good condition is expected to move at a speed ranging from 12 to 15 mph. If you suspect a problem with the batteries, make sure that you wear gloves made of thick clothing material before you check them out. Depending on the problem, there are multiple ways to fix a hot club car solenoid coil resistor. If it is more than 4.6 volts, then you need a different resistor. If the car is moving at a speed slower than this, then there might be a few things you need to look into. BAD. Some power resistors are designed to run hot if necessary - or rather to safely dissipate a certain amount of power, depending upon the various physical conditions and requirements of their operating environment. The energy transfer causes the resistor to get hot. and all of you guys thanks! Old CB radio with tubes, Any Tx causes Rx freq drift up and down. It is natural for the golf cart’s muffler to get filled with unburnt oil or sludge. You must log in or register to reply here. A 4 ohm 5 watt resistor protecting an LED lamp. They don't get hot hot to the point where I have to remove my finger. Resistors are designed/manufactured in certain resistance values and power dissipation values. As the fan speed is one of the most frequently adjusted settings of the air conditioning system, the blower motor resistor is put under constant stress, which can cause it to eventually fail. With the setup you have, the resistor dissipates about 2Watts. Over time, that heat can cause the resistor to fail naturally. A EZGO golf cart may not go forward or reverse because of a  malfunctioning microswitch, solenoid, or ignition switch. They are mostly found in golf carts that operate on AC motors. Yamaha carts are more economical than EZGO because they have no fuel pumps and filters to refill or replace. Hi there. The speed sensor plays an important role in keeping a healthy control over the multiple motor functions. If it is powered by electricity, the cart will not move. Pay attention to the wattage rating on the resistor when designing the circuit that it will be a part of. This continued supply of power results in damaging the starter, flywheel or wiring. By using the content on this website, you agree to the terms outlined in this disclaimer. This could be as a result of damaged or burnt connections. JavaScript is disabled. When the flow is through a … For my resistor I used this product. The speed sensor can also malfunction when the magnet inside the golf cart is damaged. However, as a side effect of reducing current flow, resistors generate heat. I have yet to get the 4x 270 ohm 1/4 watt resistors and try those. My name is Ernie Lo and I'm an avid golf fan! The resistor will still feel "kinda" hot to the touch (because it's doing what resistors do), but substantially less than in our previous example. Once you have done this, the muffler will get unblocked and start functioning normally again. I assume you are aware that the power dissipated by any resistance is the product of the voltage across the resistance and the current passing through the resistance. 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