Question about Dryers

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I AM WORKING ON A FRIGIDAIRE DRYER MOD.#LEQ144ESO. MY PROBLEM IS THAT WHEN I FIRST START IT UP IT GETS VERY HOT TO THE POINT THAT YOU CAN'T TOUCH THE TOP. THEN WHEN IT DOES DECIDE TO START CYCLING,IT CYCLES NORMALLY WITH NORMAL DRYER TEMPS.THIS IS NOT A VENTING PROBLEM AS I CHECKED THE DRYER WITH THE VENT DISCONNECTED JUST TO BE SURE.THE MAIN CONTROL BOARD HAS ALSO RECENTLY BEEN CHANGED.WHAT COULD BE CAUSING THIS? REMEMBER, AFTER A WHILE IT WILL START CYCLING NORMALLY. APPRECIATE YOUR HELP. FRED.

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  • papaduck2008 Apr 26, 2010

    please read my statement, as clogged ducting and or thermostats may explain the overheating, why is this problem only in the beginning and then the dryer cycles normally with normal temps?

  • papaduck2008 Apr 27, 2010

    as I said before, the dryer runs normal after the first few minutes, why does it get super hot in the very beginning? so hot you can't touch the top of the dryer.then continues on and cycles with normal dryer temps.

  • papaduck2008 Apr 28, 2010

    I UNDERSTAND HOW A DRYER WORKS AND WHAT THE T STATS ARE FOR . IVE NEVER HAD A PROBLEM LIKE THIS BEFORE, PLEASE READ MY PROBLEM BEFORE ANSWERING.

  • papaduck2008 Apr 28, 2010

    I'll recheck

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4 Answers

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  • Dryers Master
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Hello there
I will explain this in 2 seperate posts ok so try this one first
The dryer uses multiple thermostats to regulate the temperature. When the temperature is higher than the preset limit of a particular thermostat, the thermostat breaks the circuit and the heater goes off. When the temperature cools enough, the thermostat closes the circuit again and the heat can come on.
Caution: Please read our safety information before attempting any testing, maintenance or repairs.
I AM WORKING ON A - cautiontri.gif Before testing the thermostats or fuse, unplug the clothes dryer or shut off the power at the fuse box or breaker panel to avoid an electrical shock hazard.
google_protectAndRun("ads_core.google_render_ad", google_handleError, google_render_ad); Most dryers have a choice of temperature settings, therefore a separate thermostat is used for each setting. The selector switch or timer control then routes the circuit through the appropriate thermostat.
If a thermostat fails, it may prevent the heat from coming on, This happens because the thermostat does not close the circuit when the temperature falls below the operating temperature of the switch. It is a simple matter to test a thermostat; it should show continuity when the switch is cool and no continuity when it is warmer than its rated temperature.
A thermostat can also fail by being always on, no matter what the temperature. This switch would show continuity whether it was hot or cold. In this case, the heater would not shut off and the the dryer could dangerously overheat. As a safety precaution a second thermostat is used, a thermal fuse. The power will be cut to the heating circuit if the maximum safe temperature is exceeded. In most cases, this is a one time fuse. The heater circuit will not function until the fuse has been replaced. Of course, it will be necessary to determine and repair the underlying cause of overheating or the fuse will just cut out again.
The thermostats are usually grouped together. The are typically oval in shape and about an inch and a half in size. They may be on the blower housing, under the lint trap or inside the vent line. There should be two wires connected to each thermostat.
Label the wires and connections so that you can properly reconnect them later. The wires are connected with slip on connectors. Firmly pull the connectors off of the terminals (do not pull on the wire itself). You may need to use a pair of needle-nose pliers to remove the connectors. Inspect the connectors and the terminals for corrosion. If either is corroded they should be cleaned or replaced.
To test the thermostats or fuse, set the multitester to the ohms setting X1. Touch one probe to each terminal. You should get a reading of either zero or infinity. At room temperature, the thermostats should have a reading of zero. When the thermostats are heated to their limit temperature, they should switch off and you should get a reading of infinity. The fuse should be tested at room temperature for continuity.

Posted on Apr 28, 2010

  • Michael Thomas
    Michael Thomas Apr 28, 2010

    Hello there :

    we are just here to try to help you out ok i really think that you problem lies in the one of the answers that we all have provided and i think that you are just missing somthing that is probably simple or you are missing a step somewhere in there

    after 20 plus years of working on these appliances i have found out that it always turns out to be somthing that the customer or my self has looked over and missed like a burned capacitor or a burnt part or a misdiagnosed electrical readout ok

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You could have a shorted heating coil, or a faulty thermostat.
I would venture to say the control thermostat is not registering properly on a cold start.

CLICK HERE to see/purchase a replacement.

Thanks!


Posted on Apr 28, 2010

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The Relay or the moister control sensor that controls the heat is at fault it seems. I would think the relay is sticking since you do receive heat very well

Posted on Apr 26, 2010

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  • Master
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Hi


Thanks for using FixYa. As you have already tried to clean the lint then the Overheating is usually cause by thermostat failure, bad thermal limiter and/or clogged ducts inside the dryer. To start with you’ll need to check clogged ducts, if they appear fine then check the high limit thermostat (part#33 in this picture) and check thermal limiter (part#36 in the picture).


I AM WORKING ON A - bc22f51.gif



Please do accept the solution if the issue is resolved or post a comment for further assistance.


Thanks
Rylee

Posted on Apr 26, 2010

  • Rylee Smith
    Rylee Smith Apr 26, 2010

    Fred you are right however as I said it can be the Thermal Limiter which is causing this issue.

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