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X10 WS12A and PRO XPD3: Decorator Dimmer Wall Switch Module


Product Pages


0.38 lbs.
Power Supply
120VAC @ 60Hz
Max Load
500W, incandescent lights only (i.e. 120V Standard or 120V Halogen). No appliances.
Black Lead
Blue Lead
Red Lead
Slave/Companion Switch
  • Responds to All Lights On and All Units Off.
  • Cap off red lead with a wire nut for single switch applications.
  • Requires X10 WS14A or PRO XPSS Companion Switch for 3-Way applications.

Operating Environment
Operating Temperature Range
32deg to 104deg F (0deg to 40deg C)
Operating Humidity Range
0-90% Relative Humidity
Storage Temperature Range
-4deg to 158deg F (-20deg to 70deg C)

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Troubleshooting FAQS

I bought an X10 dimming wall switch in 2007 or later and its manual does not seem to describe its behavior correctly. Do you have updated instructions?

I have a light that I would like to control from two different switches, but right now it only has one switch. Can X10 help me without rewiring?

Why can’t I use the X10 WS467 Wall Switch Module to control a fluorescent light?

I've noticed that my wall switch module feels quite warm to the touch. Is this normal, and is it safe?

If I mount multiple dimmer switches right next to each other, does that reduce the maximum load they can safely handle?

Why do some modules work in some outlets and not in others?

Why do some modules sometimes turn on and off by themselves?

My wall switches are installed and appear to be working properly, but they emit an audible hum. Why does this happen? Is this normal?

Why does my Wall Switch Module turn on but not off?

Why does my Wall Switch Module turn off but not on?

Why can't I use an X10 Wall Switch Module to control a fluorescent light?

Since there are 256 possible addresses, am I limited to 256 controlled devices?

My WS13A and a WS14A are setup for a 3-way application with fluorescent lights. My WS14a will only turn the light off. Why?

My WS12A and a WS14A are setup for a 3-way application with incandescent lights. My WS14A does not control the light properly. Why?

What is the wattage capability for X10 wall switches?

Where are the House and Unit Code dials on my Decorator-style wall switch?