My bathroom has a double switch plate: one for a fan and one for the light. I've replaced the light switch with a dimmer (Lutron Maestro Model# MACL-153M.) And I've also replaced the incandesent light with a 40" LED by Commercial Electric which is dimmable. The light won't power off, nor will it dim. It just stays on. Worth mentioning…there was no visible ground wire when I installed the switch. Only two wires were available to connect to my dimmer. So I capped the green ground wire coming out of the Lutron. Could this be why? (BTW, is this still considered a single pole even though the fan is attached to the same switch?)
This is the inside of box with my attempt at connecting the Lutron switch.
this is the metal face of switch:
Under ‘Important notes’ in the Lutron instructions, it mentions: When no ‘grounding means ‘ exists in the wall box, the…code allows a control to be installed as a replacement if 1) a non-metallic, non-combustible faceplate is used with non metallic attachment screws, or 2) the circuit is protected by a ground fault circuit interruptor. When installing a control according to these methods, cap or remove green wire before screwing control into wall box.