Lutron Dimmer switch, single pole, will not dim

Which dimmer do you have. So I can look up the manual.
Are you using a fan dimmer, or light dimmer?
Does the dimmer feel warm to touch? or hot?
What does the dimmer control? Incandescent? Fluorescent?
How many total watts are being dimmed?
Is this a new dimmer or old dimmer that started having a problem?
Add a comment with as much detail as possible for best available answer.

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This is single-pole -or- 3-way dimmer
Manual shows on following link:
http://www.lutron.com/TechnicalDocumentLibrary/0301107A.pdf

1) Manual says: The red/white wire is not used in a single-pole application. Twist a wire
nut over this wire for a single-pole application.
2) Green wire connects to bare ground wire. Or bare ground to bare ground.
3) Connect dimmer-red and dimmer-black to either insulated wire that came off of old switch

Add a comment for more free help.
Also take advantage of fixya phone service.
For a price, fixya expert speaks with you over phone while you work on dimmer or any do-it-yourself project.
We are always less expensive than a service call.

Lutron Maestro IR shows several model numbers:
http://www.lutron.com/Service-Support/Technical/InstallationInstructions/Pages/InstallationInstructions.aspx?syst=Dimmers+%26+Switches&prodn=Maestro+IR%C2%AE+dimmer

You posted under MIR600 single pole digital fade dimmer for incandescent and halogen.
Installation manual:
http://www.lutron.com/TechnicalDocumentLibrary/030864b.pdf
If this is not your dimmer, then add a comment with exact model number so I can read that manual and look for trouble spots.

The manual does not say 'Fan'
It appears this dimmer is for incandescent and Halogen lights.
Manual gives Lutron 24hr/7day tech support number 1-800-523-9466

If you do not want to add a comment for more free assistance, and do not want to call Lutron, then take advantage of fixya phone service.
Expert will walk you through the problem for a price.

Lutron Maestro MAW-600 manual:
Single-Pole 600 Watt Halogen/ Incandescent Dimmer (minimum 40 Watt)
http://www.lutron.com/TechnicalDocumentLibrary/0301106A.pdf

Lutron technical support 1.800.523.9466




You said pendant lights blew out.
How many total watts were those lights?
Did you remove aluminum break-away fins on side of device to match wattage?

Front indicator can be pulled out to cut power to circuit.
This is called FASS switch.
Try pulling out FASS switch and then pushing it back to see if it re-sets device.
Click breaker on-off to see if it resets device.
You replaced a single-pole switch that has two wires plug ground wire.
Each wire from switch goes to either screw on MAW-600 so it's hard to go wrong there.
Bare copper goes to green ground screw.
Otherwise, it looks like tech support is next step: 1800-523-9466

There are no repair parts for in-wall electrical devices.
When they go dad you buy another.
Lowes and Home Depot carry inexpensive dimmers.
Look for 3 things:
1) Wattage: most off-the-shelf dimmers are 500-1000Watts. Add up total wattage.
2) If you are dimming incandescent bulbs, dimmer package will say tungsten or incandescent.
Package will say florescent if dimmer also works for florescent bulbs.
3) If dimmer is 3-way, with a dimmer on either end of a room, many times the dimmers are sold as a package of 2 dimmers with 1 dimmer that controls the other dimmer.

Lutron dimmers
http://www.lutron.com/Products/StandAloneControls/Dimmers-Switches/Pages/DimmersSwitches.aspx
Leviton dimmers
http://www.leviton.com/OA_HTML/ibeCCtpSctDspRte.jsp?section=15265&minisite=10025

To separate any wiring problem from dimmer problems, temporarily replace the dimmer with a regular switch. Use it that way for few weeks if necessary. If it works normally with the switch, you need a new dimmer.

The dimmer is worn out

Wall switches and dimmers don't come apart for repairs >> nobody sells parts >> and the wiring didn't suddenly go bad.

This video from the Lutron site shows the Diva switch but it is the video for the Skylark single pole switch also. It makes no mention of one wire being a larger gauge and does not differentiate which wire connects to line power and which to load. I do not think the wire gauge makes any difference.

get new one,not repairable.