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For years 1984-1990, Sundance Spas 600 Series Circuit Boards, 600 Systems. Sundance Spas / Balboa 600 Series Printed Circuit Board with Temp Sensor.
Replacement for the following: 505, 601*, 602*,603, 604, and 605 series boards.
*Note: 601 & 602 circuit boards require 6560-865 timer upgrade.
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