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Balboa 51823 Circuit Board 9800CPR2(x), Caldera Spas, Watkins 72223

  • Manufactured by: Balboa Water Group, Inc.
  • Part Number: 51823
  • Chip Number: 9800CPR2(x)

$261.17

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Item Number: 22-5715

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

This new OEM circuit board is for replacing Balboa 51823 circuit boards having a 9800CPR2(x) chip number.

The Balboa 51823 9800CPR2(x) circuit boards are also found in hot tubs made by Caldera Spas, Watkins Manufacturing Corp. under the part number 72223.

Tip: The "(x)" shown above is shorthand for a range of last letters on 9800CPR2 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 , unless specified otherwise in the ADDITIONAL CROSS REF., COMPATIBILITY & INSTALLATION section below.

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:
  • 51823
  • BAL51823
  • BB51823
  • 51823-01

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:
  • 9800CPR2A
  • 9800CPR2B
  • 9800CPR2C
  • 9800CPR2D
  • 9800CPR2E
  • 9800CPR2F
  • 9800CPR2G
Additional Cross Ref., Compatibility & Installation
After installing this replacement circuit board please call us if your topside control panel isn't working.
It's a simple setting and we are happy to help you get it set right so your topside control panel works with this replacement circuit board.
System Control Box Serial Numbers
Tip: The system control box is usually located below the hot tub and the circuit board mounts inside of it.

Please note: System control box serial numbers cannot identify a circuit board.
Please note: Do not use this section for confirmation of making the correct purchase.

The Balboa 51823 9800CPR2(x) circuit board can be found in the following hot tub system control boxes (but not limited to).

System Control Box Serial Numbers:
  • 72165
  • 72205
  • WAT72165
Tip: When replacing a hot tub circuit board, testing the heater and replacing it (if bad), is recommended before installing or applying voltage on a new circuit board.
Note: A continuity test is not a sufficient heater test. Contact us by phone for more details on testing a heater.

Tip: Burned circuit boards or burned heater relays are often due to a loose electrical connection or a bad heater or both.
If all connections are tight and if the heater is good then the heater relays are probably old and worn out.
If a burned relay was powering a pump and all electrical connections are tight then the relay is probably old and worn out or the pump might be bad or going bad or all three.
Replacing the heater and/or pump with a new one is recommended if any of those scenarios apply.

Unsure of what something on this page means?

Please contact us so we can better assist you.


  • Manufactured by: Balboa Water Group, Inc.
  • Part Number: 51823
  • Part Number: 9800CPR2(x)
  • Item Number: 22-5715


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