June 24, 2025

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Changing a Relay in an L&L Automatic Kiln (Video)
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See https://www.youtube.com/video/dFIhqOI8en8

How To Change A Relay
  • When changing a power or control relay in an Easy-Fire, Easy-Fire XT, School-Master, or eQuad-Pro Kiln, be sure to keep the wires in the right sequence.
  • The configuration is similar to a Jupiter panel or as a control relay in a DaVinci or Easy-Load panel.
  • When performing this maintenance, make sure the kiln is unplugged or locked out and tagged out at the circuit breaker or fused disconnect switch.
  • For more information see this page
    • Parts

    See this page for the 12-Volt 30-Amp relay we use for most kilns.

    This page describes the 240-volt 30-amp relay we use as a control relay for 480-volt kilns.

    Changing a thermocouple on an Easy-Fire Kiln (Video)
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    See https://www.youtube.com/video/m700BW3flYY?si=LfTkt4Um9E8LI7hm

    This video is useful for changing a thermocouple on any L&L kiln - in particular an eQuad-Pro or a School-Master Kiln.

    Be sure to maintain proper polarity.

    In the USA: Yellow Wire = PLUS (+) Red Wire = MINUS (-) The thermocouples are marked with a (+) and (-). Also the negative (-) is marked with a red marker. The negative wire is MORE magnetic than the positive wire.

    For more information about thermocouple polarity, color coding, and markings see this page.

    Parts

    See this page for the standard type K thermocouple.

    See this page for the mounting hardware.

    See this for all thermocouple parts and