Turn off the circuit breaker and verify power is absent with a non-contact tester. Standard dimmers are often incompatible because they disrupt the neutral path required by many modern dimming technologies.
Advanced Wiring Techniques for 3 Way Dimmer Solutions
These three wires are the travelers, which are typically black or red, and they carry the electrical current between the switches. Connect the ground wires together and secure them to the box or switch chassis.
Ensure wire nuts are tight and no copper strands are fraying outside the connection. You must specifically purchase dimmers labeled as "3-way" or "multi-way" compatible.
Advanced 3 Way Dimmer Wiring Techniques and Compatibility
Incandescent and halogen bulbs provide a stable resistive load that most dimmers handle easily. Always check the dimmer's specifications to ensure it supports the type and number of bulbs in your fixture.
More About Dimmer on a 3 way switch
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