I installed 2 3 way lighted dimmer switches (DR703PWV) in my Living room Chandelier, and the control for On & Off is working as it is supposed to, but when I try to dim the chandelier flickers from both switches. I had an old rotary switch that worked fine before.

http://waterheatertimer.org/How-to-add-switch.html
http://waterheatertimer.org/Basic-household-circuit.html
http://waterheatertimer.org/Install-owb.html

Gene

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

You miswired the switch. One of your black wires is misplaced.

Look at 3-way drawing in 6633 manual.
Notice that device has to be installed to Hot wire.
Only one of your 3-way switches will have the Hot wire.

Change device with other 3-way switch.
Make careful note of which wire connects to dark-colored screw. This is the common screw.

Lutron Dimmer manuals
http://www.lutron.com/Service-Support/Technical/InstallationInstructions/Pages/InstallationInstructions.aspx?syst=Dimmers+%26+Switches&prodn=Maestro%C2%AE+dimmer+%26+switch

Lutron manuals show a couple things that might be affecting you lights.
1) Wattage: If you have wrong wattage dimmer
2) Type of light bulb: Dimmers work on different types of bulbs
3) Wiring: You say you got 3 wires going to the chandelier? Why you got 3 wires? Is this a 3 way switch? Are the chandelier bulbs wired separately so you can control groups of bulbs with different switches?
Does the dimmer have 3 screws? A dark-colored screw and 2 brass screws? If so, then that sounds like a 3-way dimmer. A 3-way, is where more than one switch controls the same light.

Does the dimmer have 2 screws? Then that dimmer controls a single circuit. Your black Hot wire from breaker box connects to one screw and the black wire to Load connects to other screw.
A quick glance at Lutron wiring manual shows that Hot and Load wires connect to either screw.
The question is your 3-wires from the chandelier ... does the black Hot wire from breaker arrive in the ceiling box first? Or does it arrive in the wall box first? If your Hot arrives in ceiling box, then the Hot must come down to the switch box and connect to a screw on the dimmer >>> a second wire connects to other screw on dimmer and travels up to the ceiling box where it connects to black wire on chandelier. The white wire on chandelier connects to white Neutral.
4) Dimmer might be bad

As a general rule for timers and dimmers:

The Black dimmer wire connects to black hot wire coming from breaker (122V line)
The red dimmer wire connects to Load (wire going to chandelier)

The wall red wire that is capped could be a couple different things. a) It could go to a second switch that was used to control the chandelier. b) it could be another wire that goes to same ceiling box as chandelier to be used to control a fan, except you don't have a fan. In the second case, if you install a fan with a light, you could control fan and light separately.

The green is a ground wire that connects to bare copper wire in box. The bare copper connect back to main breaker box on the Neutral busbar.
White wires that are twisted together inside your light switch box also connect back to to main breaker box on the Neutral busbar.
The ground wire and neutral are a redundant safety system to protect you from electrical devices and appliances that have 'shorted'
The black hot wire connects back to the circuit breaker.

For example, each circuit breaker controls one area of household lighting. The black white and copper wires leave breaker box in a single romex cable. The romex travels to a junction box in the area where the lights are located. The junction box is usually a switch box or a ceiling box. From the junction box, the romex travels to each other switch, light and receptacle box in the area. So each box has 1 hot and 1 neutral and 1 ground that is connected in a line that leads back to breaker box.

Here's a couple pages that make home wiring easier to understand:
http://waterheatertimer.org/See-inside-main-breaker-box.html
http://waterheatertimer.org/240-v-water-heater-circuit.html
http://waterheatertimer.org/Install-owb.html

It could be how you have it wired. 2 way switches can be tricky. One of switches will have a wire run to the chandelier and this is where your dimmer should go. Here's a link to a explanation of 2 way wiring. Hopefully this will help. If you want to check to see if it is the bulbs, you could put in non energy efficient bulbs although I think it's another problem. If it was the bulbs, the dimmer would at least turn on the energy efficient bulbs in the low position. Good luck!

Link to 2 way switch diagram

http://2wayswitch.com/2-way-switch-wiring-diagram/

It's possible that he living room outlet feeds through the dining room switch and that a wire may have become disconnected when you put in the dimmer. I don't know the specifics of you home layout. If the dining room and living room are on different circuit breaker switches, this is not the problem.

Someone used the pull chain on both units. Whenever you install a remote or wall-mounted dimmer, it's always best to cut the chains short (after setting the fan to high) to prevent someone who doesn't know any better from using them.

Download the installation sheets here:

http://www.lutron.com/cms400/PageBuyNow.aspx?id=16977&mn=1815

Unfortunately, the hum is normal for operation of that type of dimmer at low levels.  Sometimes the lamp filaments will also "sing" a high pitched sound.

If the previous light worked ok and you didn't touch the wall switch, you must have a faulty connection at the chandelier end, check the connections again. Is there a seperate switch on the chandelier?