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Elegoo Mars 3 Limit Switch Replacement

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  1. Elegoo Mars 3 Limit Switch Replacement, Remove the back screws: crwdns2935265:01crwdnd2935265:01crwdnd2935265:01crwdne2935265:0

    • Remove 6 screws.

    • 12.5mm self tapping screws with 2.0mm hex socket head

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  2. Elegoo Mars 3 Limit Switch Replacement, Remove the back lid: crwdns2935265:02crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 Elegoo Mars 3 Limit Switch Replacement, Remove the back lid: crwdns2935265:02crwdnd2935265:02crwdnd2935265:02crwdne2935265:0

    • Use a small flat-headed screwdriver, spudger, or similar to pry open the lid enough to be able to get a grip of it and pull straight back and then fold down.

    • The back of the lid has a PCB with cables connecting it to the motherboard inside the unit. While not particularly fragile, do take care so you do not damage the connectors.

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  4. Elegoo Mars 3 Limit Switch Replacement, Unplug the cable for the limit switch: crwdns2935265:03crwdnd2935265:01crwdnd2935265:01crwdne2935265:0

    • In my case the replacement limit switch was delivered already connected to a cable. If you are only replacing the actual switch you can skip this step and instead unplug the opposing end on the switch itself later..

    • Remove the limit switch cable connector in the bottom right corner by pulling it straight out.

    • Be sure to pull the connector, and not the cables!

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  5. Elegoo Mars 3 Limit Switch Replacement: crwdns2935265:04crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 Elegoo Mars 3 Limit Switch Replacement: crwdns2935265:04crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 Elegoo Mars 3 Limit Switch Replacement: crwdns2935265:04crwdnd2935265:03crwdnd2935265:03crwdne2935265:0

    • Remove the two screws securing the limit switch.

    • M4x7.5mm socket screw with 2.5mm hex socket head

    • Hold the limit switch in the lower end and pull it downwards.

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To reassemble your device, follow these instructions in reverse order.

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Konrad Skeri Ekblad

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I've looked everywhere and can't seem to find a place to buy a replacement limit switch. Any suggestions?

johnathan cuda - crwdns2934203:0crwdne2934203:0

I got my replacement directly from Elegoo support. Send them an email, they are very helpful.

Konrad Skeri Ekblad -

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