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Honeywell RTH230B When I took the face plate off, a small silver thing fell. I don't know where it came from. It is about 1 inch long. There is pentagonal shape on one end, 3-dimensional. The other end is flat and has 2 prongs on the side. Can someone help me figure this out. Without this piece, there is no display, it is blank. Thanks.

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Go to honeywell.com
Under red welcome sign
Bottom red highlighted box literature/image search
Type in thermostat model number
Click on arrow to right
Then click on the PDF files owners manual / installation instructions
If you can’t find what you want, the bottom left and bottom of web
Page, they have homeowners assistance and Home products to get the help you need.

Posted on Jun 07, 2010

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