Z-Wave Light Switch not working?

I just purchased a few GE Z Wave Light Switches to control my basement lighting with my iPhone. I have three way switches, and they all work before, but as soon as I replace one of them for a Z-Wave switch, none of my switches work for me. I'm 100% sure I installed them correctly, and I even had an electrician come and take a look. What do I do?

Check the Fuse. Check the loose wires and connections. If all are good, then buy the part / aftermarket to replace it.

These must be programmed to operate to-gether. The code of the switches must be the same as the code on the receiver. There are more than 4 billion code options. Check the instructions for setting the code.

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