I currently have an Intermatic timer switch on my lights, and I would like to add a dimmer switch next to the timer switch, because the lights are sometimes too bright, is it possible to have both a dimmer switch and a timer switch on one light?

The dimmer switch: https://www.amazon.com/dp/B0771BC2YH?psc=1&ref=ppx_yo2_dt_b_product_details

The Intermatic timer: [1]: https://www.amazon.com/gp/product/B003A3V03A/ref=ox_sc_saved_image_1?smid=ATVPDKIKX0DER&psc=1

also will the dimmer switch interfere with the timer

  • 2
    Should be possible. Think you need the timer first in circuit then the dimmer. Dimmer might make the timer wonky if the dimmer is first.
    – crip659
    Commented Mar 10, 2022 at 21:39

1 Answer 1


Tough question. The issue is the problem of "dimming the timer".

If it is a hand-crank mechanical timer, like the classic Intermatics, then it doesn't matter since the timer is a "dumb" on/off switch powered by you. I would put the dimmer first, and dim the timer, because I can comfortably say virtually every dimmer is OK with that, and will remember its brightness between uses.

However, if the timer has any internal electronics, or takes a neutral wire, then it needs to be first. You can't dim a device with onboard electronics.

  • Hey Harp. I'm surprised you said to put the dimmer first. Whether electronic, mechanical motor driven, or hand crank, I would think they'd expect line voltage. I see no point in putting the timer behind the dimmer. I certainly agree with you regarding electronic timers. Commented Mar 11, 2022 at 0:57
  • @GeorgeAnderson -- a wind-up timer only cares about the electricity supply insofar that its contacts are able to safely switch the voltage given to it Commented Mar 11, 2022 at 2:06
  • @George I have a wind-up timer on a 240V line. They are just a dumb switch and don't care. There is a minor cost to putting the dimmer downline of the timer: it will tend to lose its internal settings if it has any. Commented Mar 11, 2022 at 3:19

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