Question about Whirlpool LER4634J Electric Dryer

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Dryer not turning on at all

My dryer is not turning on at all. I relize i need to check the door switch, on switch and outlet (but they "appear" to be ok) but i was wondering if there wasn't a fuse somewhere on the dryer that i can more easily visually inspect before getting out the multimeter. If so, where would i find it? Thanks

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  • jason027 Aug 22, 2008

    ok - i think i located the thermal fuse. Stupid question but, when i check the fuse, if i don't get a current through it when i test with my multimeter, that means its bad right?? I did check the outlet, and the door swtich and all came up ok.

  • jason027 Sep 02, 2008

    I replaced the thermal fuse and all is working again. Thanks for everything! Now i just hope the reason for the fuse going doesn't show up again. Great site. Keep up the good work!

  • Anonymous Sep 06, 2008

    Where is the thermal fuse located



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There is no fuse that you can visually check on this dryer. The thermal fuse is a solid white plastic component that does not have a visual filament. If the model number you listed this under is correct, the thermal fuse is located in the rear of the dryer, mounted on the air blower housing. You can access it by removing the back panel of the dryer. It will be located on the left hand side of the dryer (facing from the rear with panel removed) adjacent to the operating thermostat on the blower fan housing. If you have verified the door switch, verified the voltage at the wall receptacle, and verified you don't have a breaker tripped somewhere, then the next logical step would be to perform a resistance check of the thermal fuse. This is not a resettable device and must be replaced if blown. Let me know if you need further assistance. I hope this helps you.

Posted on Aug 21, 2008

  • Jeff Rockwell
    Jeff Rockwell Aug 22, 2008

    My apologies Jason, I should have given you this link to assist you in my previous post:

    This will give you some good advice on how to troubleshoot and what measurements you should get with a multimeter. In addition, it gives you some good advice on proper maintenance and how to prevent future problems.

    To answer your question, if you are talking about a resistance check, the thermal fuse should read close to a short (approx. 0 ohms). If it reads an open (inifinite reading on a mulitmeter) you have a blown fuse. As far as voltage checks across the fuse are concerned, a voltage reading actually indicates a bad fuse, while a reading of 0 VAC indicates the fuse is good.

    The reason: Voltage is the difference in potential between two points. With the fuse shorted (good fuse) there is no difference of potential between the two sides of the fuse. Thats why you get a 0 VAC reading. With the fuse open (bad fuse) there IS a difference in potential across both sides of the fuse, so your meter will indicate a voltage reading. This is often a point that the do-it-yourselfer confuses because they misunderstand what the multimeter readings are. I hope this does not confuse you. For simplicity reasons, this is why I recommend a simple resistance check with the dryer unplugged.

  • Jeff Rockwell
    Jeff Rockwell Sep 02, 2008

    The number one cause for thermal fuse, thermister, or thermal cutout problems is poor ventilation. A little routine dryer maintenance can go along way towards keeping some of these problems from reoccuring. Congrats on fixing the problem yourself! I hope I can be of assistance again if you need anything.



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What to check when your dryer won't start-

The wall outlet 240 volts:
The first thing to check when your Whirlpool dryer is not starting is the wall outlet to make sure that the dryer is getting the proper voltages. On an electric dryer there should be 240 and 120 volts present at the terminal block.

A blown fuse or tripped circuit breaker are one of the major causes why the dryer won't start. To check the voltage on an electric dryer you will need to use a multimeter.

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A gas dryer connects to a 120 volts wall outlet, and it is very easy to check the outlet. Disconnect the dryer and connect a hair blower or any other small appliance on the outlet.

If they work, then the problem must be on the dryer. If the don't work, check for a blown fuse or tripped circuit breaker. If the problem is bigger than that, have a license electrician check the house wiring. A bad wall outlet could be the reason why your Whirlpool dryer is not starting.

The thermal fuse:
The thermal fuse is use on an electric dryer as a safety devise to open the motor circuit if the operating thermostat fails to open at the preset temperature or if the motor draws too much amperage.

A blown thermal fuse could be the reason why your Whirlpool dryer is not starting. It is located behind the back panel on the dryer.

The door switch:
The door switch is another safety device use on the dryer. It is connected on the neutral line of the motor circuit. A door that is not closing properly or a bad door switch could be the reason why your Whirlpool dryer is not starting.

The push to start switch:
The push to start switch is use to start the motor. There are two types of switches. The older type switch is a solenoid operated door switch and the other one is a simple push to start switch.

A bad solenoid operated or regular push to start switch could be the cause why your Whirlpool dryer is not starting.

The timer:
The timer is the distribution center or the brain of the dryer. Inside of the timer is that the electricity gets routed to the different electrical parts in the dryer.

The timer has contact points, and the contact points wear or burn out depending on the amount of use. Contacts burnt inside of the timer, could prevent the dryer motor from starting..

The motor:
Also, the motor could be burnt bad. A motor that smells like rubber burning, makes growling noises, runs for a wile, the won't start until is cool down or a motor that runs fine, but the centrifugal switch is not making the right connections is a bad motor and must be replace. you could see, there are many parts that could be the reason why your Whirlpool dryer is not starting.

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