Balboa 52709 Circuit Board 135R1(x) Alt Replacement, Coleman Spas

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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:

• 52709
• BAL52709
• 52709-01

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:

• 135R1A
• 135R1B
• 135R1C

Additional Cross Ref., Compatibility & Installation

Changes in functionality:
This replacement circuit board is compatible with the original topside control panel, however, the the button order will be changed.
For example, pushing the Light button will turn the Jet on/off.
Pushing the Jet button will turn the Light on/off.
Another example, if you have two buttons for adjusting the temperature (Up and Down button), those buttons become combined into one button.
The ability to adjust the temperature is still there.
Everything else will function as before.

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.

Tip: Items shown in RELATED PRODUCTS below have also been found in hot tub systems with Balboa 52709 135R1(x) circuit boards.

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