Wholesale Sensors Replacement for Pentair Pool Spa Heater Repair Kit USA Business, 5-Piece Kit, Includes 42002-0024S, 42001-0063S, 42002-0025S, 42001-0060S, 42001-0053S

Wholesale Sensors Replacement for Pentair Pool Spa Heater Repair Kit, 5-Piece Kit

Keep essential pool heater repair components ready with the Wholesale Sensors Replacement for Pentair Pool Spa Heater Repair Kit. This convenient 5-piece kit combines commonly serviced temperature sensing and safety components used in compatible Pentair MasterTemp and Sta-Rite Max-E-Therm pool and spa heaters.

Instead of purchasing individual replacement components separately, this kit provides five important parts in one package. It is an excellent solution for pool service technicians, maintenance professionals, property managers, and experienced homeowners who maintain compatible Pentair and Sta-Rite heating equipment.

The kit includes replacements for:

42002-0024S Stack Flue Sensor
42001-0063S High Limit Switch
42002-0025S Automatic Gas Shutoff Switch, AGS
42001-0060S Water Pressure Switch
42001-0053S Thermistor

Pentair identifies these part numbers as service components used throughout its MasterTemp and Max-E-Therm heater systems. Pentair also groups these components among commonly used parts in its heater master kit program.

Each Wholesale Sensors component is engineered as a perfect OEM-style replacement that meets or exceeds OEM specifications for fit, function, electrical performance, and response characteristics in compatible applications.

Five Essential Heater Components in One Kit

Pool and spa heaters depend on multiple sensors and safety switches to operate correctly. Rather than relying on a single temperature sensor, the heater monitors water temperature, exhaust temperature, water pressure, and high-temperature safety conditions.

This 5-piece kit provides replacements for several of these critical components.

The 42002-0024S Stack Flue Sensor monitors flue or exhaust temperature. It provides temperature feedback used by the heater’s control and safety system to identify abnormal exhaust temperature conditions.

The 42001-0063S High Limit Switch is a temperature safety component designed to respond when water temperature at the monitored location exceeds its intended operating range. It helps protect the heater from excessive temperature conditions.

The 42002-0025S Automatic Gas Shutoff Switch, commonly called the AGS switch, is another safety component within the heater electrical system. Pentair identifies 42002-0025S specifically as the Automatic Gas Shutoff Switch, and replacement references list it for MasterTemp and Max-E-Therm heaters.

The 42001-0060S Water Pressure Switch verifies that sufficient water pressure or circulation is present before normal heater ignition is allowed. Pentair officially identifies 42001-0060S as the Water Pressure Switch in its MasterTemp heater water system.

Finally, the 42001-0053S Thermistor monitors water temperature and provides the electronic control with the temperature information needed to regulate heater operation.

Together, these five components cover several important temperature monitoring and safety functions within compatible pool and spa heaters.

Compatible with Pentair MasterTemp and Sta-Rite Max-E-Therm

The kit is designed primarily for compatible Pentair MasterTemp High-Performance Heaters and Sta-Rite Max-E-Therm High-Performance Heaters.

Pentair’s current heater replacement parts catalog identifies its commonly used master kit components for MasterTemp and Max-E-Therm models 175, 200, 250, 300, 333, and 400. Pentair notes that the referenced master kit configuration is not compatible with the 125,000 BTU heater.

Popular compatible heater families include:

Pentair MasterTemp 175
Pentair MasterTemp 200
Pentair MasterTemp 250
Pentair MasterTemp 300
Pentair MasterTemp 333
Pentair MasterTemp 400
Sta-Rite Max-E-Therm SR200
Sta-Rite Max-E-Therm SR333
Sta-Rite Max-E-Therm SR400

Compatibility can vary by heater generation, fuel configuration, and individual component. Always verify your heater model and the original part number of the component being replaced before installation.

42002-0024S Stack Flue Sensor

The stack flue sensor monitors the temperature of combustion exhaust leaving the heater.

Accurate stack temperature information is important because unusually high exhaust temperatures can indicate an operating problem. A defective stack flue sensor can also provide incorrect information to the heater control system.

Replacing a confirmed failed 42002-0024S sensor may help resolve SFS-related faults, incorrect flue temperature feedback, or heater shutdown conditions caused by a defective sensor.

An SFS fault should not automatically be treated as a failed sensor. Actual high flue temperatures can be related to water flow, combustion, airflow, heat exchanger, or other heater conditions that require diagnosis.

42001-0063S High Limit Switch

The high limit switch provides temperature-related safety protection.

If the heater experiences an excessive temperature condition, the high limit circuit can interrupt normal heater operation. A defective high limit switch may also prevent the heater from completing its normal operating sequence.

Replacement of a confirmed defective 42001-0063S can help correct HLS-related faults or heater shutdown conditions caused by a failed switch.

If the replacement switch continues to open, diagnose the heater for an actual overheating or circulation problem rather than repeatedly replacing the switch.

42002-0025S Automatic Gas Shutoff Switch

Pentair identifies 42002-0025S as the Automatic Gas Shutoff Switch, or AGS, in the MasterTemp heater electrical system.

The AGS is an important safety component associated with abnormal temperature conditions. A defective AGS switch can prevent normal heater operation, while an actual AGS trip can indicate a condition that requires further diagnosis.

The replacement 42002-0025S is intended for compatible MasterTemp and Max-E-Therm applications.

42001-0060S Water Pressure Switch

Proper water circulation is essential whenever a pool or spa heater is operating.

The 42001-0060S Water Pressure Switch signals the heater control system when adequate water pressure is present. If the heater does not detect the required condition, ignition can be prevented to protect the heater from operating without sufficient circulation.

A defective pressure switch can contribute to a heater that refuses to fire even when the pump is operating.

However, an open water pressure switch can also correctly indicate a circulation problem. Before replacing it, check the pump, filter, valves, plumbing, water level, wiring, and actual flow through the heater.

Never bypass the water pressure switch to force heater operation.

42001-0053S Water Temperature Thermistor

The thermistor provides the heater control with water temperature information.

As water temperature changes, the thermistor’s electrical resistance changes. The electronic control interprets this signal to determine water temperature and manage heating according to the selected setting.

A failed or inaccurate thermistor can contribute to incorrect displayed temperatures, inconsistent heating, unexpected cycling, failure to maintain the selected temperature, or temperature sensor faults.

Replacing a confirmed defective 42001-0053S thermistor helps restore accurate temperature feedback to the heater control system.

Designed for Professional Heater Maintenance

Having these five commonly serviced components together can reduce the need to order individual parts during troubleshooting and maintenance.

For pool service companies maintaining multiple MasterTemp or Max-E-Therm heaters, keeping a complete replacement kit available can be particularly useful. Property managers, hotels, community facilities, and homeowners maintaining compatible equipment can also benefit from having essential replacement sensors and switches available.

Each component is designed for straightforward replacement in its specified location. However, these parts are not intended to be installed simultaneously unless diagnosis indicates that each component requires replacement.

Diagnose Before Replacing Safety Components

This kit contains components involved in important heater monitoring and safety functions.

A heater fault code does not automatically mean the corresponding sensor or switch has failed. For example, a water pressure switch fault can indicate inadequate circulation, while a high-limit or stack flue condition can indicate actual overheating.

Check related systems including water circulation, filter condition, valves, wiring, electrical connections, combustion, airflow, heat exchanger condition, thermal regulation, and heater controls before replacing components.

Never bypass the high limit switch, AGS switch, water pressure switch, stack flue sensor, or other heater safety devices.

Pool and spa heaters involve electricity, combustible gas, hot surfaces, exhaust gases, and pressurized water. Professional service by a qualified pool heater technician is recommended when appropriate.

Rigorously Tested for Dependable Performance

Wholesale Sensors focuses on precision sensing and switching components.

Each component in this repair kit is rigorously tested according to its intended function. Testing includes applicable electrical continuity, resistance characteristics, switching response, temperature response, consistency, and overall functionality.

Durable housings, secure electrical connections, temperature-resistant sensing components, and application-specific switching mechanisms help provide reliable operation in demanding pool and spa heater environments.

Wholesale Sensors Quality, Warranty, and USA Support

Wholesale Sensors specializes in temperature sensors, thermistors, pressure sensors, pressure switches, and replacement sensing components for pool and spa systems, appliances, HVAC equipment, automotive applications, commercial equipment, and other demanding environments.

The Wholesale Sensors Replacement for Pentair Pool Spa Heater Repair Kit gives customers five frequently serviced heater components in one convenient package while maintaining our focus on accurate sensing, dependable switching, and carefully tested performance.

Your kit includes replacements for 42002-0024S, 42001-0063S, 42002-0025S, 42001-0060S, and 42001-0053S, backed by a 12-month warranty and responsive USA-based product support from a USA business.

For professional technicians or pool owners maintaining compatible Pentair MasterTemp and Sta-Rite Max-E-Therm heaters, this 5-piece repair kit provides a convenient way to keep essential temperature and safety components ready when they are needed.