Question about Lasko Ceramic Heater

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Lasko heater run about 5 minutes and shut down/how to clean

The heater is two years old and I think it needs cleaning, it runs about 5 minutes and shut down and you have to wait about 5 more minutes to start it again and it will run about 5 more minutes my email address is trainmanw@email.com

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  • Anonymous Dec 22, 2008

    I have the same problem....for awhile cleaning the vents on the back worked but now it's to the point where that no longer does the trick. I myself am trying to figure out how to open the heater up to clean it further

  • dado255 Nov 14, 2009

    There is a recall on the heater's control modual... It must be sent in or replaced. Lasco offers a free replacement, if the product code and other information from your reciept is given to them. As well,.. if you purchased a Product Care Plan from Wal Mart ,you may replace it with a simular heater

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I have the same problem ... i almost throw this heater out ,,
the fix .. open the unit theres 6 screw at the back.. remove it if you have problem removing the triangle screw use the small square head screw ...size 0 and then you also need to open the black plastic ..
i believe it has 8 screws .. then vaccuum all the dust .. chances are the front and the back of the heating element is covered with dust ..
after that put all back together and i guaranteed it should work like brand new ,,,, dont worry its not that hard ... the only hard thing for me was removing the 2 triangle screws at the back .. Goodluck

Posted on Feb 23, 2009

  • 2010an28 Nov 04, 2010

    thanks Karnenote, it worked.

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I HAD THE SAME PROBLEM TOOK IT APART CLEAN IT OUT FROM DUST WORKS GREAT

Posted on Mar 27, 2010

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I just took the heater apart like Karnenorte mentioned and there was a lot of dust caped up on the coils!! Put it back together and it is running great!

Posted on Dec 20, 2009

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IT IS NOT NOT THE THERMOSTAT

The 5840 has a problem with dust getting on the heater element and turning itself off after 2 minutes running. HERE IS THE FIX. Unplug the unit from the AC outlet, Then using a can of dusting air ( the kind you use to clean a computer key board) aim the compressed air INTO the middle louver of the upper adjustable heater vent and blow out the dust that has gotten on the heater element. ( You are actually blowing into the unit, clearing off the lint/dust that has gotten on the backside of the heater element that you can not see without openning the entire case).You can see the front of the heater element inside the louvers, It's the shinny metal part that looks like a small radiator.It sits behind the middle louver. After blowing out the dust, shake the entire unit to allow the dust to settle to the bottom of the case. Using a vacum cleaner try to vacum out any dust from the LOWER FRONT intake. Once the dust has been blown OFF the heater element, the unit will work just as new and not shut itself down!

Posted on Oct 16, 2009

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Sounds like the thermastat has burned out (telling it to shut off)!

Posted on Dec 09, 2008

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Posted on Jan 02, 2017

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The 5840 has a problem with dust getting on the heater element and turning itself off after 2 minutes running. HERE IS THE FIX. Unplug the unit from the AC outlet, Then using a can of dusting air ( the kind you use to clean a computer key board) aim the compressed air INTO the middle louver of the upper adjustable heater vent and blow out the dust that has gotten on the heater element. ( You are actually blowing into the unit, clearing off the lint/dust that has gotten on the backside of the heater element that you can not see without openning the entire case).You can see the front of the heater element inside the louvers, It's the shinny metal part that looks like a small radiator.It sits behind the middle louver. After blowing out the dust, shake the entire unit to allow the dust to settle to the bottom of the case. Using a vacum cleaner try to vacum out any dust from the LOWER FRONT intake. Once the dust has been blown OFF the heater element, the unit will work just as new and not shut itself down!

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