I bought two of these CTCL-153PDH units for two different locations in my house.
One switch upstairs, one downstairs. One dimmer works fine, the second will NOT
dim at all. It DOES successfully turn the lights on. The "dimming range" adjustment
doesnt do anything.

I'm using the same brand LED bulbs in the two locations, - my bulbs are
compatible.

Believe I've tried every combination of wiring. I double checked the second regular
light switch on the circuit and it seems to be fine.

thankns