how to test a dryer belt switch

Before inspecting the belt, unplug the clothes dryer or shut off the power at the fuse box or breaker panel to avoid an electrical shock hazard. Your question was published, help is on its way! It worked...but it would only get warm on one setting. It's not a good feeling when you load up your dryer with soggy clothes only to have the machine not turn on when you turn the start switch. Your appliance may differ depending on the manufacturer and model. Now if one of the door switch wires came loose or you did not get the wires back on the dryer is not going to start. How to Replace the Thermal Fuse on an Amana Gas Dryer, How to Install the Infinite Switch on a Kenmore Cooktop, How to Replace the Door Switch on a Kenmore Elite King-Size Capacity Dryer, Troubleshooting a Dryer That Doesn't Turn On, How to Troubleshoot a Dryer's Thermal Cutoff Switch, http://www.appliancerepairlesson.com: Test and diagnose dryer door switch dryer repair troubleshooting, http://applianceassistant.com:How To Test A Clothes Dryer Door Switch, Start Switch, or Belt Switch, http://www.familyhandyman.com: Clothes Dryer Repair Guide, http://mechatronics.mech.northwestern.edu:Using a Multimeter, How to Check the Resistance of the Igniter in a Dryer, What to Do When an Electric Dryer Won't Turn on. If the belt was routed correctly around the idler pulley and motor the belt switch should be closed so that it will run. How to Test the Start Switch. Now remove the front by removing the screws inside the case (pointed toward the front) and lifting the front upward. You should receive a reading of infinity. Remove the screws on the side or lower front (they may be hidden under trim pieces that will have to be removed first). Step 1 As always, before working on your dryer, be sure to unplug it or turn off the circuit breaker that is supplying the power to it. The dryer won’t turn on because the dryer door is open or the dryer door switch is not working. Release the switch and the dryer stops. The start switch, door switch, and selector switch are commonly replaced parts for a dryer that won't start. The switch is a simple assembly, with two lead wires running to it. The idler pulley spring rod should not be striking the switch. Step 10 Raise the front of the dryer tub slightly, then slide the belt off. Unplug the dryer door switch connector by depressing the connector tab with your fingers, then pulling the connector off. Then take the top off by removing the two screws in the door (the only two pointing up) and lift up the top. The dryer will not start, or stops suddenly in the middle of a dry cycle. To test the thermostats or fuse, set the multitester to the ohmssetting X1. You may be able to pop the switch out of place, or remove it by removing only a single screw. If the dryer drum stops rotating, but the belt is intact, try testing the motor with a multimeter to check circuit continuity. The broken belt switch will keep the dryer from staying running, but it should start and run as long as you hold the start button in. This time, the meter's LCD should display a “0.00” for a good switch. © Copyright 2020 Hearst Communications, Inc. Walch spent 40 years working in the electrical trades and holds an Associate of Applied Science in applied electrical engineering technology from Alvin Junior College. How to Test a Dryer Start Switch. The most frequent cause for a clothes dryer's failure to start is a malfunctioning door switch. For more information about dryer start switches: How to replace a dryer start switch. (Normally Open), and N.C. (Normally Closed). Once you have released the catches, you will be able to lift the top and tilt it back on its hinges. Reverse steps 4 through 10 to install a new dryer belt. Move the probe from the “N.O.” terminal to the “N.C.” terminal and the meter should display “0.00.” An “O.L.” display indicates a faulty switch. A two-terminal switch will have terminals marked C and N.O. This is a dryer drum drive belt. His work has appeared in “Family Handyman” magazine, “Popular Science,” "Popular Mechanics," “Handy” and other publications. A three-terminal switch will have the terminals marked C (Common), N.O. The dryer will not start, or stops suddenly in the middle of a dry cycle. Move the test probe from the “N.O.” terminal to the “N.C.” terminal. Common dryer issues include a faulty door switch or start switch and control problems such as a broken dryer timer or faulty electronic control board: Problems with the door switch can prevent the dryer from starting. Turn off the gas supply to your dryer. Test: How-To Test A Clothes Dryer Belt Switch Video. Depending on the make and model dryer that you have, you may have to remove the front panels as well before you can access the door switch. Belt Switch: Some dryer models use a belt switch attached to the belt tension pulley, which will open if the dryer’s belt breaks, not allowing the dryer to operate. Double check to make sure you have unplugged the dryer before working on it. Get more answers from the people in your networks. Slide the putty knife between the top and the front panel, pushing the catches toward the rear to release them. Symptoms of a broken belt are similar to that of a broken door switch. Test the switch with a volt-ohm-milliammeter (VOM) set to the RX1 scale. Thermal Cut-Off: The dryer's thermal cut-off is similar to the thermal fuse and the high limit thermostat. It will be located under the control console panel on top of your dryer. If the test you conduct does not produce these results, you should replace the switch. There may be a piece of trim, or an endcap over the screws you have to remove. According to the wiring diagram your dryer should still start and run if you push and hold the start button. At room temperature, the thermostats should have a reading of zero. Step by step instructions on how to replace a Broken Belt Switch Kit #279782 for Dryer, Washer Dryer Combo made by Whirlpool, Kenmore, Maytag. Other commonly replaced parts for a dryer that won’t start are: Thermal fuse Drive motor Drive belt Thermal cut out fuse Main control board Timer 4. Check the spring mechanism. When the belt is off or broke the idler pulley spring rod will strike and lay up against the belt switch and it opens the switch to keep it from staying running. The door switch should be mounted to the back of the door frame. Make a sketch showing how the wires are connected to the switch, or take a picture of the connections with a digital camera. Dryers operate on 240 volts and being shocked by high voltage can kill you. The meter should indicate an open circuit by displaying an “O.L.” on its LCD (Liquid Crystal Display). Remove the trim (endcap) pieces first. The switch senses whether the drive belt is intact or broken. Here is how to test the door switch on a dryer to determine if that is the cause of the dryer's ailments. Step 11 Connect power to the washer/dryer unit. (Some dryer models have a belt switch) It will be located beneath the dryer drum. This time an “O.L.” indicates that the switch is good and an “0.00” indicates that the switch is bad. The most frequent cause for a clothes dryer's failure to start is a malfunctioning door switch. Based in Colorado Springs, Colo., Jerry Walch has been writing articles for the DIY market since 1974. The motor is bolted to the bottom of the appliance near the front, next to a tension pulley assembly that keeps pressure on the belt to prevent it from slipping. While the probes are still touching the switch's terminals, press in on and hold the switch. Shut the dryer door fully to activate the door switch. March 6th, 2008. There are two common types. Now dryer dryer runs when start switch is held to the right. ... Set the panel aside. Locate your dryer's start switch. It is 89.5 inches long with four ribs on the inside for a better grip. Access to the motor and belt may be easiest from the front or from the rear depending on your model of dryer. I could not test the old parts, so I ordered all 3 to be safe. In this video I show you how to replace the belt on a Samsung Dryer. Step 4 - Check for Obstructions in the Blower Fan. The hi-limit thermostat is a fairly reliable dryer component and is rarely the cause of dryer heating problems. I'm trying to re-connect wires to the TML thermal fuse and thermostat.A friend of mine took them all off, and after I got the replacement parts, ... Why has my LG Dryer model DLE2301W has blown 4 high limit thermostats in the past 3 weeks? From all the info I got, I narrowed it down to 3 parts, Dryer Thermistor, #AP4201716, Thermal fuse# AP4201894 and Broken belt switch# AP4044838. Place a towel on top of the dryer to protect the finish. To test the switch, open the door press in the door switch lever. If you are unable to access your dryer's door switch this way, you will have to remove the front panel of your dryer. The belt tension switch cuts your GE dryer off in the event that the belt breaks. Answer Randall, You will want to make sure that the belt switch is being activated by the idler pulley. The reading should change to zero. The two catches securing the top in place are located at the front right- and left-hand sides, about one to two inches in from the sides. How to Test a Dryer Door Switch With an Ohmmeter. Now if one of the door switch wires came loose or you did not get the wires back on the dryer is not going to start. Set the function switch on the Ohmmeter to the R X 1 scale. This video provides step-by-step repair instructions for replacing the belt switch on a GE gas dryer. Step 2 - Turn Dryer on Its Side. What is the capacity of my Kenmore washer model 41744072300 and the matching dryer? The dryer belt broke so that the dryer won’t turn on. I had originally planned to part it out and use the motor for some random project, but after seeing how g… Some dryer models use a belt switch attached to the belt tension pulley, which will open if the dryer's belt breaks, not allowing the dryer to operate. Open the door on the dryer and try to turn the drum either clockwise or counterclockwise. Remove the wires from the switch. Locate your dryer's door switch. why does my dryer only work if i hold down the start button? Because it has no electricity, the dryer won’t turn on. It will be located around the door opening in the front panel. In some cases you may need to use long-nosed pliers to pull the female wire connectors off the male terminals. Inspect the pulley. Remove the front panel, if necessary, by lifting it up off it's bottom mounting clips and pulling it toward you. Randall for Model Number DWSR405EB2WW. The switch on the dryer may be accessible from the outside door, or you may have to remove the top of the dryer to access it. This means disconnecting the vent duct and unplugging the electrical power if not already … Once you have located the dryer motor, remove the rubber belt from the motor with your hands or with the assistance of a screwdriver. Note: This video is intended to give you the general idea of the part replacement procedure. You should get areading of either zero or infinity. The belt switch will have a pink and a brown wire attached and it should be close to idler spring mounted on the motor bracket or base. Symptoms of a broken belt are similar to that of a broken door switch. Kyle McBride Place one of the test lead probes on the "C" terminal of the door switch and the other test lead probe on the “N.O.” terminal. If the belt breaks mid-cycle, the switch turns off your dryer and keeps it off until the damaged belt is replaced. Door switches get a great deal of hard use. The forceful closing of the dryer door often leads to cracking of the plastic switch housing and the eventual failure of the switch's internal contacts to close properly and complete the electrical circuit supplying power to the dryer's timer motor. Any other display reading -- 0.00 for example -- indicates a defective switch. The difficult part of this task is gaining access to the switch. by Manage My Life. Step 3 - Remove Belt. Disconnect the switch leads and clip one probe of the VOM to each switch terminal. While the reasons that your dryer isn't working could be numerous, in most cases, either the power is off or the dryer's start switch … One is a spring which attaches to the pulley and tensions the belt. In order to access the motor, you will need to turn the dryer on its side. Disconnect the dryer from the wall outlet; Open the toe panel and look to see if the belt is broken or just derailed from the motor & idler pulleys Door switches get a great deal of hard use. An “O.L.” on the LCD indicates a defective switch. This video demonstrates how to test a two terminal switch on a gas or electric dryer. Test: Disconnect all connecting wires and check for continuity across the hi-limit thermostat or sensor set. Testing a dryer door switch is a simple process. Like any other component in your appliance, the belt switch can malfunction causing your dryer to stop working even though the drive belt is fully functional. Touch one probe to each terminal. Test and Repair a Clothes Dryer Switch : A family member gave me a fairly new electric clothes dryer that they recently replaced. The broken belt switch will keep the dryer from staying running, but it should start and run as long as you hold the start button in. Move your dryer to an area where it will be easy to access the rear of the machine if possible. Access the door switch by releasing the catches and raising up the top of the dryer. The door switch will have either two or three terminals on it, depending on whether the dryer has a drum light. Tilt the control console forward onto the towel and remove the rear panel. I opened the back exhaust area and determined that the belt was not broken. Heat only working for few minutes then turns off on gas dryer. To check this, first unplug dryer. To gain access under the control panel, you will have to remove the screw(s) located at either end of the control panel. Dryer won’t turn on – possible causes in order of likelihood. Touch one of the meter's test probes to the “C” terminal on the door switch and the other test probe to the “N.O.” terminal on the door switch. T he start switch is located inside the control console. Additionally, if your dryer uses gas, be sure to turn the gas feed off too. If you could turn the drum easily without much resistance, most likely you have a broken or derailed belt. If not then this will cause the dryer to not run when the start switch is released.

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