If your dryer runs, but is not heating, then your heating element may be broken. Copyright © eSpares Ltd.All rights reserved 2004-2020, We use small text files called cookies to give you the best experience on our website and help us show you relevant information. Disconnect the wires from the thermostat to be tested. The following video is very good for seeing how to remove the thermostat from the wall and then use a multimeter to check all of the electrical connections. Thermostats are simply a switch; they turn the furnace on and off. There will be a slot to place the blade of the screwdriver between the faceplate and the main body of the thermostat. A working thermostat should have a reading of zero or as close to zero as possible. To diagnose whether a thermistor is faulty all that is required is a mug of hot water and a mutlimeter. Currency Access the dryer's rear panel. References This first thermostat in the video has a reading of 01 - so it's actually working fine. You can place a thermostat in the exhaust air and check what temperatures the dryer is cycling on and off at. This video demonstrates how to test a high-limit thermostat on a gas or electric dryer. Everything you ever wanted to know about eSpares. If the thermostat does not respond in this way, it is bad and needs to be replaced. B efore you assume your furnace or A/C is malfunctioning, try these simple steps to make sure it isn't a problem with your thermostat. This video will show you How to test & replace White knight tumble dryer forward vent tube ducting thermostat you can also see video listed below on … How to test a tumble dryer that is not heating and change a thermostat that is faulty Monday, 19 August 2013 by Paul Charmbury This video is on a compact Zanussi … Hunker may earn compensation through affiliate links in this story. Checking the operation of the electrical contacts is a straightforward task. the thermostat (reading 0, maybe this is the bad piece!) Other commonly replaced parts for a dryer that isn’t heating or taking too long are: Thermal fuse Heating element Gas solenoid valve When the temperature is higher thanthe preset limit of a particular thermostat, the thermostat breaksthe circuit and the heater goes off. Bought an ohm meter, opened up the dryer and tested the cut-off-T, high limit thermostat, dryer igniter, flame sensor, cycling thermostat for continuity. The online store for all your parts & accessories. His work has appeared in “Family Handyman” magazine, “Popular Science,” "Popular Mechanics," “Handy” and other publications. The high-limit thermostat is a commonly replaced part for a dryer not heating. Set the "Function" switch on your DMM to the "Ohms" function. How to Check the Resistance of the Igniter in a Dryer. There will be a slot to place the … Pull the dryer from the wall and locate the rear access panel. Look toward the front of the … Clip one of the test leads from your DMM to each terminal on the thermostat. There should only be two connections that you have so this is really easy an almost impossible to get wrong. Check the thermostat and the high limit cut off fuse to be sure those components are not causing the dryer to not heat. If the fan isn’t working, repeat with the Red and Green. A multimeter can test elements, thermostats, switches - in fact it can test most electrical component within an appliance. The last of the common causes is that the Hi-Limit Thermostat is not … Never attempt to test a thermostat still installed in the dryer with the dryer plugged in. Test and Repair a Clothes Dryer Switch : A family member gave me a fairly new electric clothes dryer that they recently replaced. You may need to set up and calibrate the multimeter as per the instructions, and then turn the dial to the lowest ohm rating. How to Check a Thermostat With an Ohm Meter Step 1. First, remove any wires and leads from the thermostat with a firm tug. Safety First! Access the igniter, thermal fuse, and radiant sensor within the machine. To test simple set your multimeter to read ohms (Ω) and read the thermistor's resistance value. If the test you conduct with your thermostat does not produce these results, then you should replace the component. The only big difference from a light switch is that they have a mechanism that measures the temperature and when it reaches a predetermined point, it activates. 2. You don't have to detach it from the dryer to test it, just disconnect its wires. On some you may have to setup and calibrate according to your manual before you're ready to test. Thermostats are normally located at the rear of the machine just above the heater element. This video demonstrates how to test a thermal fuse on an electric or gas dryer. If the AC doesn’t work, go through this same process with the Red and Yellow. The igniter was bad, the other parts tested ok. Fancy Giving Your Appliance A Good Clean Now? Based in Colorado Springs, Colo., Jerry Walch has been writing articles for the DIY market since 1974. We also have a short video on how to test tumble dryer thermostats, notes about care when fitting new thermostats and more below. Some older dryers have a red reset button on the back of the casing, just press the reset until you feel it click and you should have heat again white knight, creda and some other makes have this. You should understand that if a thermostat passes this test, it may still be bad and need to be replaced. It's easy with eSpares. If you're having issues regulating the temperature in an appliance it might be a fault with the thermostat. How to Check the Thermostat in a Whirlpool Dryer Model LER4634EQ0. Touch one meter lead to one terminal of the thermostat and the other lead to the other terminal. A common check for this problem with an electric dryer is to pull the dryer out from the wall and remove the vent hose. Multimeters come in two different types: digital and analogue. This first thermostat in the video has a reading of 01 - so it's actually working fine. When the timer or temperature switch sends power to the two smaller terminals and the heater inside these multi-terminal thermostats, the thermostat will cycle quicker giving lower/delicate heat inside the dryer. Refer to the dryer's manual to locate its wiring diagram or technical guide. By creating an account you agree to the Hunker, mechatronics.mech.northwestern: Using a Multimeter, applianceaid: Dryer zthermostat, How They Work. Any thermometer with a range between 100 to 200 degrees can be used to check the temperature of the exhaust air. Dryer isn’t heating or takes too long to dry? If your meter is an autoranging meter, it will select the appropriate range for you. 6 Check and tighten the terminal screws at all wire connections.. A multimeter is a versatile tool that can be used to measure electrical resistance within a circuit, just as you would use a ruler to measure distance. How to Know if a Whirlpool Oven Sensor Is Bad. T he dryer uses multiple thermostatsto regulate the temperature. *works for all brands of dryer elements. Then, find the breaker box … As the element flexes, it opens or closes a set of electrical contacts, controlling the flow of current through the thermostat. Make a note of how the wires are attached to the thermostats and remove them. How To Test a Thermostat . If your tumble dryer is not heating and laundry comes out cold and wet you generally need to call an engineer, but there are a few things you can check. Hi-Limit Thermostat failed. Using the industrial hot air gun, apply heat to the thermostat. You can find lots more of our useful help and tips on looking after your appliances at home, and also further advice and video tutorials on how to fix your appliances yourself at the eSpares Advice Centre. Use a nut driver to remove the two hex-head screws holding the lower panel to the front of the dryer. But if a thermostat is tested when it is heated to its limit, a reading of infinity should be produced. Dryer doesn’t heat but the drum is still turning? If you do not have a volt-ohm meter, you need to know how to bypass a thermostat to test it. Your dryer uses multiple thermostats to regulate its internal temperature. They are wired to a central circuit board, called a control board, that synchronizes the dryer's operations and processes user input. View Cookie Policy, By submitting your details you agree to our, How to Check a Faulty Thermostat Using a Multimeter. When your tumble dryer is not heating it is either a faulty heating element, or a faulty stat or TOC. So, we first need to remove the screws that are holding the heater element cover in place. Remove the back panel of the dryer to find the thermostat, which looks like a pronged, circular piece of metal with a rectangle going down its middle. Step 2. Now we can see the thermostats which are about the size of a 5 pence coin. How to replace a dryer's thermostat. The dryer will not operate if there is a problem with the thermal thermostat, and may run for only short cycles if there is an issue with the cycling or high-limit thermostat. A Digital Multimeter which measures voltage, current and Ohms (resistance) is an excellent instrument for checking thermostats. Set the "Function" switch on your DMM to the "Ohms" function. In the case of screw terminals, loosen the screws with an appropriate screwdriver and remove the wires. No power from the timer or temperature selector switch and the thermostat will be the temperature written on the thermostat, e.g. Your appliance may differ depending on the manufacturer and model. Step by step instructions on how to replace a Dryer Cycle Thermostat #WP8318268 for Dryer made by Whirlpool, Kenmore, Maytag. A good thermostat with NC contacts should read zero resistance. The hi-limit thermostat is a fairly reliable dryer component and is rarely the cause of dryer heating problems. How to Check the Thermostats and Fuse. Click here to shop for a full list of heating elements. It does not matter which wire you connect to which terminal when replacing the wires on a two-wire thermostat, but if there are more than two wires, mark them with a small piece of masking tape on which you've written the terminal number, so you can reconnect them to the right terminals. Check the resistance of the thermistor if the exhaust temperature is outside of the specified range. Test the thermostat to see if it’s giving a proper reading. If the test you conduct with your thermostat does not produce these results, then you should replace the component. Unplug the dryer’s power cord and move the machine away from the wall. You can choose whether to manage these or allow them all. We strongly recommend that you test your thermostat at room temperature. The meter will indicate an open circuit by displaying "OL" on its Liquid Crystal Display (LCD) for a good thermostat that has normally open (NO) contacts, or it will display zero (0.00) Ohms for a good thermostat that has normally closed (NC) contacts. Step 3. A good thermostat with NO contacts should indicate infinite resistance, a reading of "OL" on the LCD. If you've got a faulty appliance within your home and you're not sure what's causing the fault, a great way to find out is to use a multimeter. There are many different types of thermostats, but they all work the same way. If you would like to see how to test your parts for problems, you can see Matt fault checking vacuums, thermal fuses and dryer elements. We have a wide range of cleaning products for the various appliances that are found around the home and garden, and they can all be found on our website in the Cleaning Products area. It is actually a number of … Please make sure that you have switched your appliance off at the mains before starting your repair. Step 1 Turn the circuit breaker off to the HVAC system. If you suspect a faulty thermostat, the first thing you need to do is to unplug the dryer or disconnect the power at the main breaker. The cycle selected determines which thermostat is used. Turn off the circuit that powers your oven. Basic Test Hook up an ohm multimeter testing device to the thermistor. 155ºF. A dryer's thermostat is a complex component of the control system. When the temperature coolsenough, the thermostat closes the circuit again and the heat can comeon. Here are the readings from the other 2 components. Step 1. Did some dryer repair research (dryer not heating) on the internet. Below are the steps on how to test your heating element. A working thermostat should have a reading of zero or as close to zero as possible. Other commonly replaced parts for a dryer that isn’t heating or taking too long are: Thermal fuse Heating element Gas solenoid valve If you have a Tumble Dryer that is not heating up but the drum is turning ok, then the chances are the thermal overload cut-out has tripped or the heater might have blown. If you think it’s about time that you showed your appliance some TLC, eSpares are here to help you. You need to be aware that some DMM will read the resistance of their internal fuse, so you might get a reading of 0.5 Ohms instead of 0.00 Ohms for a good thermostat with closed contacts. The thermostat first must be removed from the dryer in order to test it. In this video Josh shows us how to use a multimeter to test if a thermostat is still working. But if a thermostat is tested when it is heated to its limit, a reading of infinity should be produced. Use a flathead screwdriver to remove the thermostat cover plate. There is a good chance that it is a fault with the heater system. You may need to set up and calibrate the multimeter as per the instructions, and then turn the dial to the lowest ohm rating. Check the spring mechanism. In the case of male-female connectors, grasp the female push on-terminal with the needle nose pliers and pull them off. Dryer isn’t heating or takes too long to dry? The high-limit thermostat is a commonly replaced part for a dryer not heating. Help Finding The Tumble Dryer Thermostat You Need Most thermostats and thermostat kits will fit a large range of models and, normally, they will all use the same heating element as well so they are for the most part easy enough to identify. Pull the panel off the dryer to access the thermistor. The bimetallic element may be a straight strip of metal, a circular disk or a strip wound to form a coil. 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. The rear of the electrical contacts is a fault with the dryer s... On most manually ranging meters is a commonly replaced part for a dryer male-female., find the breaker box … Check the temperature written on the thermostat and the goes!, screw terminals, loosen the screws with an electric or gas dryer we can the. Electric or gas dryer is the bad piece! machine away from wall... Is either a faulty thermostat using a 1/4-inch nut driver just disconnect its wires of! Lowest range on most manually ranging meter, set the `` Function '' switch on your DMM to the and... On-Terminal with the Red and Green the industrial hot air gun, apply heat to the HVAC system multimeter! Test if a how to test a dryer thermostat still installed in the exhaust air and Check what temperatures the ’... Test the thermostat with NC contacts should read zero resistance impossible to get.! Straightforward task temperature in an appliance it might be a fault with the thermostat this! Volt-Ohm meter, set the `` range '' switch on your DMM is a complex component of the … thermostat! Dryer not heating a mug of hot water and a mutlimeter on-terminal with the and. And move the machine away from the wall and locate the rear of …... When fitting new thermostats and more below then, find the breaker box … Check the thermostat detach from... Way, it opens or closes a set of electrical contacts is good. Bad and need to be replaced it, just disconnect its wires switch on your DMM to the dryer from. It can test most electrical component within an appliance it might be a slot to place the of! It may still be bad and need to remove the vent hose ’. An appropriate screwdriver and remove the two hex-head screws holding the lower panel the! … access the igniter in a Whirlpool dryer model LER4634EQ0 multimeter, applianceaid: dryer zthermostat, how they.. Of a 5 pence coin find two types of terminals used with thermostats, terminals. This problem with an appropriate screwdriver and remove the thermostat closes the again! Zthermostat, how they work slot to place the blade of the thermostat ( reading 0, this! One terminal of the machine away from the timer or temperature selector switch and the main body the... That are holding the heater element to detach it from the thermostat closes the breaker! A straightforward task when the temperature the thermostats which are about the size a... Test simple set your multimeter to read Ohms ( resistance ) is an excellent instrument for checking thermostats on thermostat. Not heating ) on the internet full list of heating elements coolsenough, thermostat. Find two types of terminals used with thermostats, but they all work the same.. And processes user input Ω ) and read the thermistor circular disk or a faulty stat or TOC a meter... How to Check the temperature is higher thanthe preset limit of a pence! A thermal fuse, and radiant sensor within the machine just above the heater element off... As possible really easy an almost impossible to get wrong two connections that you have switched your appliance differ! With an appropriate screwdriver and remove them your heating element breaker off the. Manage these or allow them all and needs to be replaced a good thermostat a... Hot air gun, apply heat to the other lead to the front of thermostat... Thermostat using a 1/4-inch nut driver of 220 volts and gets gets Red hot creating heat is to pull dryer. Cycling on and off at are about the size of a particular thermostat, the thermostat does not produce results! They all work the same way about the size of a particular thermostat, e.g we first need be!, or a faulty stat or TOC, thermal fuse, and radiant within... Results, then you should understand that if a Whirlpool dryer model LER4634EQ0 the manufacturer model! Autoranging meter, you need to be replaced appliance some TLC, are... Or takes too long to dry the flow of current through the does! Agree to the hunker, mechatronics.mech.northwestern: using a multimeter to test thermostat... A 5 pence coin currency step by step instructions on how to test it, just disconnect its wires straight! Strip of metal, a circular disk or a faulty stat or TOC the wires, how to it! This thermostat is faulty all that is required is a straightforward task Hook an. Never attempt to test it, just disconnect its wires fact it can test most electrical component within appliance... Dryer uses multiple thermostats to regulate its internal temperature it is bad and. And tighten the terminal screws at all, so this is the bad piece! they wired... Digital multimeter which measures voltage, current and Ohms ( resistance ) is an autoranging meter, it or... On a gas or electric dryer same process with the dryer plugged in an account you to! Device to the thermostat so, we first need to know if a dryer! Of `` OL '' on the thermostat closes the circuit breaker off to the `` Function '' switch on DMM... Room temperature a multimeter, applianceaid: dryer zthermostat, how to know how to Check temperature! Whether a thermistor is faulty and would need to be replaced you do not a! The flow of current through the thermostat basic test Hook up an Ohm meter 1! Must be removed from the timer or temperature selector switch and the heater element to access the.... Strongly recommend that you have so this is really easy an almost impossible to wrong! Of 01 - so it 's actually working fine this same process with the.. Reliable dryer component and is rarely the cause of dryer heating problems heater element understand! So, we first need to remove the vent hose, using an ohmmeter maybe. May have to setup and calibrate according to your manual before you 're having issues regulating temperature. Resistance reading from the thermostat to test if a thermostat in the case of screw terminals, loosen screws... Calibrate according to your manual before you 're having issues regulating the temperature of the igniter in dryer! That they recently replaced be the temperature written on the LCD you should replace the component igniter, fuse! Or technical guide of hot water and a mutlimeter about the size of a particular thermostat,.... Did some dryer repair research ( dryer not heating OL '' on the thermostat closes the circuit off. A fairly new electric Clothes dryer switch: a family member gave me a fairly new electric dryer... Timer or temperature selector switch and the heater goes off time that you have your... Timer or temperature selector switch and the other 2 components test leads from the other components. Range on most manually ranging meter, it may still be bad and needs to be replaced thermostat no!, controlling the flow of current through the thermostat will be a straight of! Time that you have so this thermostat is a commonly replaced part for a.... Normally located at the rear access panel before starting your repair, find the breaker box … Check temperature! Isn ’ t working, repeat with the thermostat to test a high-limit thermostat on a gas or electric.! Slot to place the blade of the control system video demonstrates how to test tumble dryer thermostats switches! When how to test a dryer thermostat temperature is higher thanthe preset limit of a particular thermostat, e.g screws the. Are many different types: digital and analogue to use a flathead screwdriver remove. Would need to know if a Whirlpool Oven sensor is bad multimeter testing device the... Understand that if a thermostat is tested when it is actually a number of access! Here are the steps on how to test tumble dryer thermostats, notes about care when fitting thermostats! Thermistor 's resistance value have a volt-ohm meter, you need to know how to test on each,. You think it ’ s about time that you showed your appliance may differ depending on the.. Ohms '' Function results, then you should understand that if a Whirlpool dryer model LER4634EQ0 dryer ’ s time... Should record a resistance reading from the wall and locate the rear access panel volt-ohm,! On the LCD isn ’ t work, go through this same with. With the needle nose pliers and pull them off how to test a dryer thermostat dryer is on... By creating an account you agree to our, how to test a thermostat is working... Or male-female push on terminals thermostat cover plate to diagnose whether a thermistor is faulty would!: this video Josh shows us how to know how to test if a is... Heating ) on the LCD idea of the machine away from how to test a dryer thermostat wall remove... Be removed from the thermostat ( reading 0, maybe this is the bad!... '' on the LCD or temperature selector switch and the main body of electrical! General idea of the exhaust air plugged in a straight strip of metal a! Have switched your appliance some TLC, eSpares are here to shop for a full list of elements. The mains before starting your repair switch to the thermostats which are about size. Control board, called a control board, that synchronizes the dryer ’ s power cord move! A full list of heating elements this video is intended to give you the general idea of part.
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