Spa will not power on at all; no lights on control panel, no pump activity.

Safety first: You are dealing with mains voltage. If unsure, contact a licensed electrician. Always turn OFF power at the main panel before opening the spa control box.

• Check breakers and RCD/GFCI:
  • Locate the spa's dedicated breaker and any external GFCI/RCD device.
  • Reset if tripped; if it trips again immediately, there is likely a fault that needs professional diagnosis.
• Verify power at spa disconnect:
  • Use a multimeter (only if qualified) to confirm correct voltage at the spa disconnect or junction box.
• Inspect control pack connections:
  • With power OFF, open the equipment bay and control box.
  • Check that line, neutral, and ground wires are securely fastened to the USSPA terminal block.
• Check internal fuses:
  • Locate any glass or blade fuses on the control board.
  • If a fuse is blown, replace only with the same type and rating; if it blows again, a deeper fault exists.
• Call a professional if unresolved:
  • Persistent power loss or repeated breaker trips indicate a serious electrical issue requiring a spa technician or electrician.