Rep: 13
1
1
The instructions say to hold it against the wall, button pressed until the beep and light turn off. I've tried up to five minutes. I've checked the variables; wall thickness, location even different apartments. It still won't calibrate!
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Rep: 13
2
I can think of a few I've run into here are 3:
1) you are over a metal strip on the stub meant to protect wiring underneath.
2)there are no stubs, some construction materials are plastic, cardboard, styrofoam or simply not there defying good construction common sense.
3) duct work is behind wall.
My neighbor is a master carpenter & does finishing work. We talk about crappy construction we see all the time. And without seeing your project it is impossible to get specific.
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Rep: 13
2
The problem may be that you are trying to calibrate over an area that has house electrical line protectors underneath the sheet rock. These are flat galvanized steel plates positioned to prevent someone from drilling through the wires. The same thing happens with heavy gauge a/c duct work under the surface.
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Try fresh batteries? What happens when you try it *not* pressed against a surface. If you just purchased it, consider returning it.
- de David Keldsen