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Replacing Three Way Switches

Three way switch wiring diagrams to help when wiring replacement switches.

Wiring Connections for Three Way Switches

Question: I have a Sears whole house fan installed about 15 years ago that can be operated from upstairs or downstairs with 2 separate sets of timer and speed control switches, one set upstairs and the other set downstairs. One of the speed control switches failed and I located another. I thought I installed it correctly but now the other (downstairs) control doesn’t work, only the upstairs control that I replaced the rheostat/speed control switch. Can you give me a wiring diagram for this configuration so I can get it working?

This electrical question came from: Mark, from Irvine, California
Wiring Diagrams for Three Way Switches
Mark, follow the link below for three way switch wiring diagrams. When three way switches are replaced the traveler wires can be connected to the wrong terminal or attached to the wrong lead of the timer switch. This can be easily corrected once the wires are identified, as you will see on the wiring diagrams.

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Dave’s Reply:
Thanks for your electrical question Mark

The Following links will assist you with your electrical question:

Wiring Diagrams

Electrical Wiring Diagrams

Home electrical wiring diagrams are an important tool for completing your electrical projects. An electrical wiring diagram can be as simple as a diagram showing how to install a new switch in your hallway, or as complex as the complete electrical blueprint for your new home or home improvement project.

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