Balboa Water Group 30337-25 Replacement Sensor Assembly, 25FT Temperature Sensor and 31-Inch Hi-Limit Sensor, 12-Month Warranty

Restore accurate water temperature monitoring and dependable heater safety protection with the Wholesale Sensors Replacement Balboa Water Group 30337-25 Sensor Assembly. Designed as an OEM-style replacement for compatible Balboa hot tub and spa control systems, this dual-sensor assembly includes a 25-foot water temperature sensor and a 31-inch high-limit sensor.

The two sensors perform separate functions to help the spa control system monitor water temperature and protect against excessive heating conditions.

Replacement for Balboa Water Group 30337-25

Designed to replace the following OEM part number:

• Balboa Water Group 30337-25

Product Specifications:

• Product Type: Spa Temperature and High-Limit Sensor Assembly
• Temperature Sensor Cable Length: 25 Feet
• High-Limit Sensor Cable Length: 31 Inches
• Number of Sensors: 2
• Application: Hot Tub and Spa Water Temperature Monitoring
• Brand Compatibility: Balboa Water Group
• Warranty: 12 Months
• Customer Support: USA-Based

Verify the original sensor assembly, connector configuration, probe dimensions, and electrical specifications before purchasing.

Compatible Balboa Hot Tub and Spa Systems

The Balboa 30337-25 replacement sensor assembly is designed for select Balboa spa control systems requiring a separate water temperature sensor and high-limit sensor.

Potential applications include compatible:

• Balboa Water Group spa control systems
• Balboa hot tub temperature control equipment
• Spa heater control packs using separate temperature and high-limit probes
• Residential hot tubs equipped with compatible Balboa controls
• Spa systems requiring the original 30337-25 assembly

Compatibility depends on the spa control pack model, circuit board configuration, original sensor specifications, and electrical connections.

Not every Balboa spa system uses this sensor assembly. In particular, systems using integrated M7 sensor arrangements may require a different replacement.

Always confirm that your equipment requires Balboa 30337-25 before ordering.

Accurate Spa Water Temperature Monitoring

The 25-foot temperature sensor monitors spa water temperature and provides electrical feedback to the compatible electronic control system.

The controller uses this information to monitor operating conditions and regulate heating according to the selected water temperature.

Accurate temperature feedback helps support consistent hot tub operation and comfortable water temperatures.

When the original temperature sensor becomes damaged, disconnected, or electrically defective, the controller may receive incorrect temperature information.

Replacing a confirmed faulty temperature sensor can help restore normal temperature monitoring.

High-Limit Temperature Safety Protection

The 31-inch high-limit sensor performs a separate temperature-monitoring function associated with the spa heater’s overtemperature protection system.

The high-limit circuit helps the controller detect potentially unsafe heating conditions and respond according to the equipment’s safety design.

A defective high-limit sensor may contribute to heater shutdowns, temperature warnings, or interrupted heating operation.

The high-limit sensor is an essential safety component and must be installed in its designated location.

Never bypass, jumper, or disable the spa’s high-limit protection system.

Helps Resolve Common Hot Tub Sensor Problems

A defective Balboa temperature or high-limit sensor may contribute to:

• Inaccurate spa water temperature readings
• Hot tub failing to maintain the selected temperature
• Heater not activating
• Unexpected heater shutdowns
• Intermittent heating operation
• Temperature sensor fault messages
• High-limit temperature warnings
• Incorrect water temperature feedback
• Spa control system temperature errors
• Heating interruptions caused by defective sensor feedback

Replacing a confirmed defective sensor assembly may help restore normal temperature monitoring and heater control.

Similar symptoms can result from damaged wiring, inadequate water circulation, defective pumps, heater problems, or electronic control faults.

Proper diagnosis is recommended before replacing spa equipment components.

Dual-Sensor Assembly with Extended Cable Length

The Wholesale Sensors Balboa 30337-25 replacement includes two separate sensors designed for compatible spa installations.

The 25-foot temperature sensor cable supports routing between the designated water temperature sensing location and the electronic controller.

The 31-inch high-limit sensor cable provides the connection required for the heater’s designated high-limit sensing position.

The separate sensor configuration allows the control system to monitor water temperature and high-limit conditions independently.

Correct sensor characteristics, connector compatibility, cable integrity, and probe positioning are essential for dependable operation.

Spa Temperature Sensor Installation

Before installation, disconnect electrical power to the spa at the appropriate disconnect or circuit breaker.

Allow the heater and water system to cool before servicing the sensor assembly.

Locate the original temperature and high-limit sensors according to the Balboa control system’s service documentation.

Document each sensor’s mounting position, connector orientation, and cable routing before removing the original components.

Install the 25-foot temperature sensor in its designated temperature-monitoring location.

Install the 31-inch high-limit sensor in its designated heater safety-monitoring location.

Route the cables securely and connect each sensor to the correct control board connection.

Keep wiring away from sharp edges, moving components, and excessive heat.

After installation, restore power and verify that the spa controller displays an appropriate temperature reading and operates without sensor-related faults.

Professional installation by a qualified spa service technician is recommended.

Balboa Spa Error Codes and Troubleshooting

Compatible Balboa spa controllers may display temperature sensor or high-limit fault messages when the sensing circuit is open, shorted, disconnected, or producing an invalid reading.

Depending on the controller, diagnostic indications may include:

• SN: Sensor-related fault indication on certain systems
• SNS: Temperature sensor disagreement or sensor-related fault on certain systems
• OH: Overheating or high-temperature condition on certain systems
• HL: High-limit-related warning on certain controllers

The exact message and meaning depend on the installed control system.

A genuine overheating condition, inadequate water flow, or defective heater component may produce warnings similar to a sensor failure.

Replacing this sensor assembly is not guaranteed to resolve a particular fault without proper diagnosis.

Ideal for Residential Hot Tub and Spa Maintenance

The Wholesale Sensors Replacement Balboa Water Group 30337-25 Sensor Assembly is suitable for compatible hot tub and spa repair applications.

It provides a replacement option for spa owners, service technicians, and maintenance professionals working with separate temperature and high-limit sensing systems.

The combination of a 25-foot temperature sensor and a 31-inch high-limit sensor supports the monitoring functions required by compatible Balboa spa controllers.

12-Month Warranty and USA-Based Support

Wholesale Sensors specializes in replacement temperature sensors, thermistors, high-limit probes, switches, and sensing components for hot tubs, swimming pools, spa heaters, and related equipment.

The Wholesale Sensors Replacement Balboa Water Group 30337-25 Sensor Assembly provides an OEM-style aftermarket replacement for compatible systems requiring a 25-foot temperature probe and 31-inch high-limit probe.

Every replacement includes a 12-month warranty and responsive USA-based customer support, providing added confidence for hot tub owners, pool and spa service professionals, and maintenance technicians.

Choose Wholesale Sensors for dependable replacement spa temperature sensors and reliable customer support.