Question about Lasko Ceramic Heater

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Lasko heater shut down

It just shut down no red light indicator that it is receiving power from any plug i hook it up to? Is it dead?

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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

  • Steve Spahr
    Steve Spahr Dec 08, 2013

    Easy solution to keep your heater working!

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It needs some cleaning .. you need to open the unit and vacuum all the collected dust in front of the heating element and back ...and all the visible dust ,,,

Posted on Feb 23, 2009

  • Steve Spahr
    Steve Spahr Dec 08, 2013

    Another easy solution to keep your heater working!

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Cleaning did not work for me, but this is the best option if it works. Definitely try that first. I cleaned the mesh filter at bottom of front of heater, blew air through element as recommended above, still shut down regularly except when used in very cold room, then it stayed on. I thought it might be an air flow problem, as restrictive flow could cause heat to build up. I cut a square hole, approx 3" by 3" in middle back of unit, no shut downs since. I suppose you could tape a filter over hole if you like, I left it open. I think the mesh filter at bottom front doesn't allow enough air in, could cause a higher running temp.

Posted on Dec 14, 2013

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