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Lasko5840 I have a lasko 5840 ceramic heater and when I start the heater keeps around 1 or 2 minutes working and then turn off,I hope you can help me.

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  • pro_and_cont Dec 15, 2008

    I have the same problem. I called Customer Service, there is a 1-800 # and they will replace my heater. However, I try to return the heater to the store and buy a different product.

    Dec 2008

  • jlworrell68 Jan 16, 2009

    i need customer service phone number? please call me at 540-819-7734

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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!

Posted on Oct 16, 2009

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