Originally Posted by Summer2Go
I finally decided to see how well my heated mattresses would keep us warm on a cold night and plugged them in to see. Well I can't feel any heat in or on the surface of the mattress. There is warmth around the plug area, but that's it. I laid on one thinking the elements were deeper inside the mattress, and can't detect any heat. The controls are on high-6. I also left them on for an hour and came back to check. ....?
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we have a 2012 flagstaff 21fbrs with a heated mattress, which works well -- as others have commented, be sure to keep it covered, turn it on an hour or so before using it -- we've found that a setting of 2 - 3 is most sufficient -- the original mattress was replaced under warranty because one side was not working -- if you think yours is not heating, use an ohm meter to check between the pins on the mattress plug -- our mattress has a 3-pin plug; for that type, measure the resistance between center pin and each of the other pins, one at a time -- any reading from zero to a couple hundred ohms means that part of the grid is okay; if infinity is measured, that loop is open and not functioning -- hope this helps --