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Thread: Drop-in replacement for Intermatic t104m?

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    Join Date
    Feb 2013
    Pleasanton CA

    Drop-in replacement for Intermatic t104m?


    My current Intermatic t104m pool timer is really noisy (clicking sound). You can even hear it inside the house in the bedroom on the opposite wall. It's definitely the clock motor that's the root cause. I replaced it earlier this year with a brand new clock motor I bought from Amazon, but after a few months it got noisy again. I think it's just an inherent issue with the design of the clock motor (Intermatic WG1573-10D). It's pretty archaic looking, so I would think there are more modern current designs. Can you recommend another drop-in replacement timer model that's pretty reliable and quiet? Or better yet, maybe there's something that needs to be done to "tune-up" the clock motor?


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    Join Date
    Jul 2014
    Sacramento, CA

    Re: Drop-in replacement for Intermatic t104m?

    I have 2 of those Intermatic analog timers, one for the main pump, one for the boost pump; unfortunately no interlock to ensure the main pump is on before the boost (and have had the main pump's on screw shift). It looks like this is a digital 3-circuit timer that's a drop-in replacement:

    Not cheap (around $200 everywhere I found), but definitely a more modern design!
    21000gal IG plaster, Sacramento CA area (late 1950s/early 60s)
    Filter: Cartridge, Pentair CCP420 (2014)
    Main pump: Pentair IntelliFlo VS (2015)
    Boost pump: 3/4hp (2011), Polaris 280 cleaner (unknown age)

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    In the Industry

    ps0303's Avatar
    Join Date
    Jul 2011

    Re: Drop-in replacement for Intermatic t104m?

    Maybe the gears for the timer need a little greasing. The Intermatic P1353ME mentioned above is a good digital replacement for what you currently have.
    Paul A word of caution: When working with gas and electrical you might want to consider a licensed contractor. Consider the value of your life and others around you. If you would like to provide a review of the help I provided, please use the following link to leave a review. gastek - Google Search,

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