Customer Service
1-828-781-1903


Balboa 53579 Circuit Board 21862R1(x), Marquis Spa

  • Manufactured by: Balboa Water Group, Inc.

$686.70

Add to Cart:

Item Number: 22-4742

  • Description
  • Details
  • Reviews
Please read entire page before placing an order.

For a money saving option, give us a call and ask about getting your circuit board repaired.

This new OEM circuit board is for replacing Balboa 53579 circuit boards having a 21862R1(x) chip number.

The Balboa 53579 21862R1(x) circuit boards are also found in hot tubs made by Marquis and possibly others.

Tip: The "(x)" shown above is shorthand for a range of last letters on 21862R1 chip numbers this circuit board can replace.

Please note: A list of chip numbers this circuit board can replace is specified in the CROSS REFERENCE VERIFICATION section below.

Please Note: The numbers on the new circuit board you receive may be different and the components may look slightly different but it will still connect the same and it is a fully compatible OEM replacement .
Cross Reference Verification
Step 1 of 2:
Tip: Locate the serial number on the old circuit board being replaced.
Tip: The serial number is on a sticker on the old circuit board (not the box).
Tip: The serial number is shown on the sticker preceded by S/N or P/N (part number).
Tip: The image above shows an example of a serial number sticker (click image to enlarge it).

Verify the serial number on the old circuit board being replaced is in this list.

Serial Numbers:
  • 53579
  • BAL53579

Step 2 of 2:
Tip: Locate the chip number on the circuit board you are replacing.
Tip: The whole chip number is on a sticker located on the circuit board (not the box).
Tip: This is a different sticker than the serial number sticker.
Tip: The chip number sticker usually has two lines of text and the top line is the whole chip number (the bottom line is not needed).
Tip: See image above for an example of a chip number sticker and where they're typically found on the circuit board (click the image to enlarge it).

Verify the chip number on the circuit board being replaced placed is in this list.

Chip Numbers:
  • 21862R1A
  • 21862R1B
Additional Cross Ref., Compatibility & Installation
If a wiring diagram is shipped with this new circuit board (or emailed) then it shall override your existing wiring diagram.

Otherwise, set wires and/or jumper pins and/or dip switches on the new circuit board to match how they are on the existing circuit board (assuming the old circuit board is already set correctly as per the original wiring diagram on the existing control box).
Tip: Items shown in "Related Products" below have also been found in hot tub systems with Balboa 53579 21862R1(x) circuit boards.

Unsure of what something on this page means?

Please contact us so we can better assist you.


  • Manufactured by: Balboa Water Group, Inc.
  • Item Number: 22-4742


Be the first to write a review.  Write a Review.

Related Products

(Items shown here are sold separately.)