Replacement Balboa 30298 Hi-Limit Temp Sensor Cable with 1/4″ Bulb 12 Month Warranty & USA Suppor

Restore dependable high-temperature monitoring in your compatible spa or hot tub with the Wholesale Sensors Replacement for Balboa 30298 Hi-Limit Temperature Sensor Cable with 1/4-Inch Bulb. Engineered as a perfect OEM-style replacement, this sensor is designed to meet or exceed original functional specifications while providing reliable temperature monitoring for compatible Balboa spa control systems.

The Balboa 30298 is specifically a hi-limit sensor, not the primary spa water temperature sensor. It is used as part of the spa heater’s safety and control system to monitor temperature at the heater. If an excessive-temperature condition occurs, the control system can use information from the hi-limit sensor to interrupt heater operation and help protect the equipment.

This makes the hi-limit sensor an important component for safe and dependable spa heater operation.

Replacement for Balboa 30298

This Wholesale Sensors component is designed as a replacement for Balboa 30298.

Documented replacement and cross-reference numbers include:

30298
5-60-8002
5-60-8018
30921
305103
9711-31
BAL30298
BB30298

Spa Parts Plus identifies 30298 as a Balboa hi-limit sensor and lists 5-60-8018 and 30921 as alternate numbers. An Allied Innovations catalog identifies 5-60-8002 / 30298 as a Balboa digital 31-inch hi-limit sensor. Additional spa-parts cross-reference catalogs associate 30298 with 305103, 9711-31, BAL30298, and BB30298. Spa Parts Plus Ltd.

Always verify the original sensor part number, cable length, bulb dimensions, electrical connector, and spa control configuration before purchasing.

Balboa 30298 Sensor Specifications

The original Balboa 30298 configuration is documented with the following specifications:

Sensor Type: Hi-limit temperature sensor
Cable Length: Approximately 31 inches
Bulb Diameter: 1/4 inch
Bulb Length: Approximately 2 inches
Wiring: 2 wire
Connector: 2 pin
Application: Spa and hot tub heater high-limit monitoring

Multiple spa-parts references independently document the 31-inch cable and 1/4-inch bulb configuration. SpaCare further identifies the sensor as having a 2-inch bulb length, two wires, and a 2-pin connector. Spa Parts Plus Ltd.

These physical and electrical characteristics are important when determining compatibility. A sensor that looks similar should not automatically be treated as interchangeable.

Compatible Balboa Spa and Hot Tub Controls

Balboa 30298 is designed for various older Balboa spa control systems using this specific hi-limit sensor configuration.

Documented applications include select:

Balboa Deluxe control systems
Balboa Standard control systems
Balboa Duplex control systems
Balboa LiteLeader control systems

Spa Parts Plus specifically identifies 30298 for Deluxe, Standard, Duplex, and LiteLeader systems. It also states that the sensor is used in Balboa control systems using a pressure or flow switch, with the hi-limit sensor mounted on the heater. Spa Parts Plus Ltd.

An industry catalog similarly describes 30298 as a 31-inch hi-limit sensor with a 1/4-inch bulb and 2-pin connector for non-M7 systems, except certain LE applications. Elm Sales and Equipment

Important: Not for Balboa M7 Systems

Compatibility with the control system is especially important for this replacement.

Balboa 30298 is not designed for M7 control boxes.

SpaCare specifically warns that the 30298 sensor will not work with M7 control boxes. SpaCare

Balboa M7 systems use different sensor configurations. For example, Balboa 32016 is documented as a different 24-inch sensor used with M7, LE, and Value systems, while 30514 is another 31-inch sensor associated with certain M7/Value/LE configurations. These should not automatically be substituted for 30298. Cloudfront

Before ordering, verify that your existing control system specifically uses 30298 or one of its documented cross-reference numbers.

High-Limit Heater Temperature Monitoring

The primary purpose of the 30298 sensor is to provide high-limit temperature monitoring.

Spa Parts Plus explains that this sensor is mounted on the heater in compatible Balboa systems. The sensor works with the control system to monitor conditions at the heater and provide the temperature information required by the hi-limit safety circuit. Spa Parts Plus Ltd.

This is different from the normal water temperature sensor used to regulate the temperature selected at the spa control panel.

Some Balboa systems use separate temperature and hi-limit sensors. For example, industry documentation shows Balboa sensor assemblies combining a separate 96-inch temperature sensor with a 31-inch 30298 hi-limit sensor. Cloudfront

Correctly identifying which sensor has failed is therefore important before replacing parts.

Helps Correct Hi-Limit Sensor Problems

A damaged, open, shorted, or inaccurate hi-limit sensor circuit can interfere with normal heater operation.

Potential symptoms associated with a faulty hi-limit sensor or circuit can include:

Spa heater will not operate
Heater shuts down unexpectedly
Intermittent heating operation
Hi-limit or sensor-related fault indication
Control system detects an abnormal sensor condition
Spa fails to maintain normal heating operation

These symptoms do not automatically prove that the 30298 sensor is defective.

Similar problems can be caused by insufficient water flow, a clogged filter, pump problems, pressure or flow switch faults, heater problems, damaged wiring, corroded connections, control board faults, or an actual overheating condition.

Because 30298 is specifically documented for systems that use a pressure or flow switch, checking the water circulation and flow safety circuit is particularly important during diagnosis. Spa Parts Plus Ltd.

Rigorously Tested for Dependable Performance

Each Wholesale Sensors replacement for Balboa 30298 is rigorously tested for temperature-sensing response, electrical continuity, connection integrity, wiring reliability, and consistent functional performance.

The sensor uses the required 1/4-inch bulb configuration and 31-inch cable format for compatible applications, helping provide proper placement at the heater and connection to the control system.

Correct sensor characteristics matter because the spa control relies on the electrical behavior of the sensor to determine temperature conditions.

Straightforward Replacement Installation

Before beginning installation, disconnect electrical power to the spa or hot tub at the breaker and allow the heater to cool.

Locate the existing hi-limit sensor at the heater and trace its cable to the control connection. Note the original routing and mounting position before removing it.

The 30298 uses a two-wire, 2-pin connector, allowing the replacement to connect to compatible Balboa control systems in the same intended circuit. SpaCare

Install the 1/4-inch sensor bulb in the same position as the original. Route the cable carefully and keep it protected from sharp edges, excessive heat, moving components, and areas where it could be pinched.

After installation, restore power and verify normal spa and heater operation.

If the spa continues to report a high-limit or sensor problem, diagnose the heater, circulation system, pressure or flow switch, wiring, and control board before replacing additional components.

No Automotive OBD-II Codes

Balboa 30298 is a spa and hot tub heater sensor, so automotive OBD-II diagnostic codes do not apply.

Spa fault displays vary according to the exact Balboa control system. Because the same general symptom can result from multiple components, this listing does not claim that replacing 30298 will universally clear a specific spa error code.

Always diagnose the sensor circuit and consult the service information for the specific control system.

12-Month Warranty and USA-Based Support

Wholesale Sensors specializes in dependable replacement temperature sensors, thermistors, probes, switches, and related components for pool and spa equipment, appliances, HVAC equipment, commercial foodservice systems, automotive applications, and industrial equipment.

The Wholesale Sensors Replacement for Balboa 30298 Hi-Limit Temperature Sensor Cable with 1/4-Inch Bulb provides a reliable replacement when the original hi-limit sensor has been properly identified as faulty.

Every replacement includes a strong 12-month warranty and responsive USA-based product support, providing added confidence for spa owners, hot tub technicians, service companies, property managers, maintenance professionals, and equipment repair specialists looking for a dependable Balboa 30298 replacement.