Question about Lasko 675900 Stanley® Heater

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Portable Heater keeps turning off

I have a Lasko 675900 Stanley Heater about one year old. Used it fine until a couple of months ago when it started turning itself off about three minutes after plugging in. Tried plugging into a larger extension cord (15 amp) and then directly into the wall - same thing happened. Tried turning it off for 10 minutes and trying again and same thing happened. Does it sound like heater is defective or someting else?

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  • annimajor Apr 10, 2009

    My Stanley model 675900 heater keeps shutting off. I've done the reset and it only lasts about 5 min or less and it shuts off again.

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I just fixed my Stanley Lasko 675900 FOR GOOD and would like to tell the world how to fix it!


1. Remove the front plastic grill. The bolts are torx heads with a center pin. You may be able to find a torx head driver with the center pin but I improvised. I Used a dremel tool with a small rounded diamond bit to grind the center pins out of each screw so I can use a standard torx head driver on the screws.
2. Remove the heating element. These should be Phillips screws.
3. Blow out the dust from the back side of the heating element. (be careful with the fragile fins)
4. put it all back together and it should work just fine.
5. (optional at your own risk!) I believe the small gadget attached to the top of the heating element with the white wire is the limiter. You can use pliers to slide the unit out of the element and either move the unit further toward the center area, or cut the device out completely with wire cutters and then splice it back together. If you do this REMEMBER TO CLEAN THE BACK OF TH HEATING ELEMENT EVERY MONTH TO PREVENT A DUST FIRE!

I hope this work for you and good luck!

Posted on Jan 27, 2011

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Looks like a clogged heating element the front and the back .tried to open it and vacuum all the dust ... goodluck .

Posted on Feb 23, 2009

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Sounds like the heater is going out on limit, have you looked at the blower in it ? is the screen clogged ? is the fan covered with dust or debrie ? has the unit ever been dropped ? periodic cleaning with an air nozzle is a good idea to help keep the unit running properly, if these are not the problem then you may have a faulty limit inside it, check to make sure all connections inside the unit are tight make sure there is nothing blocking air flow, if the problem still persists, you may want to see if you can get a replacement under warranty as defective, I hope one of the suggestions will help it to work, but these unit are notorious for being tempermental, hope this helped, let us know and leave a rating, thanks ,
mr.grzz

Posted on Jan 25, 2009

  • kayea Dec 16, 2010

    We have the exact same model with the exact same problem. My husband is wondering if the heating element is burned out..any answers?

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I used a standard dremel tip for the screws with no problem - I first opened the whole unit up and cleaned the back of the heating element - it was furry with dust. Then I plugged it in and again, after about 30 seconds, it stopped. I reopened the side grills and vacuumed out both sides of the fan, and now it seems to be working. I think sucking air back through the unit, the heater element, and the fan must have gotten a lot of gunk out. These things should have much better air filters on them. It's been running for about 3 minutes now, more than it has in several years. Thanks for the help, everybody

Portable Heater keeps turning off - a9411908-3713-4b9c-8448-fedd2c8c60c8.jpg

Posted on Dec 19, 2016

  • Jack Whyte
    Jack Whyte Jan 02, 2017

    PS - I wrote this December 19, and the unit has been working perfectly ever since.

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We used a compressor with a blow gun attachment to clean the dust out. Heater works like new. They put those massively annoying screws on the unit to stop people from hacking the units and causing fires. What's brilliant is anyone remotely interested in hacking will figure out how to get around those screws as evidenced by the gentleman in possession of a diamond tip dremel tip

Posted on Mar 18, 2012

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