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Pentair 42002-0025S Replacement 140F Automatic Gas Shutoff (AGS) Switch | Design for Pool & Spa Heater | Easy Installation Pool Maintenance Kit & Accessories | 18-Month Warranty & USA Support

4.7 out of 5 stars 209 ratings
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  • ESSENTIAL SAFETY UPGRADE FOR POOL & SPA HEATERS – The Pentair Replacement 140F Automatic Gas Shutoff (AGS) Switch 42002-0025S is a vital component that enhances the safety and efficiency of your pool or spa heating system. Designed to prevent overheating, it automatically shuts off the gas supply when temperatures exceed 140°F. This ensures stable operation, protecting your equipment while maintaining a comfortable and controlled water temperature.
  • COMPATIBLE DESIGN WITH PRECISE FIT – This replacement switch is designed specifically for Pentair Sta-Rite Max-E-Therm pool and spa heaters, fitting models SR200, SR333, and SR400. It serves as a direct replacement for the Pentair 42002-0025S switch, ensuring a seamless fit. The package includes one 140F AGS switch with the exact specifications needed for proper installation. Its precise dimensions allow for a secure and stable connection within your heating system.
  • PREMIUM-QUALITY MATERIALS FOR DURABILITY – Crafted with high-grade materials, this gas shutoff switch is built to endure the demanding conditions of pool and spa environments. Resistant to high heat, humidity, and chemical exposure, it ensures long-lasting functionality. The advanced sensor technology provides accurate temperature monitoring and swift shutoff response, helping maintain optimal water temperature while reducing potential risks associated with overheating.
  • SIMPLE INSTALLATION FOR QUICK REPLACEMENT – Designed for easy installation, this replacement AGS switch allows pool and spa owners to restore their heater’s safety function without professional assistance. Simply remove the faulty switch and secure the new one in place for immediate functionality. This automatic shutoff component works efficiently by detecting excessive temperatures and cutting off the gas supply, providing enhanced protection with minimal effort.
  • TRUSTED USA MANUFACTURER WITH WARRANTY ASSURANCE – Manufactured by Wholesale Sensors, a reputable USA-based company, this replacement switch is backed by an 18-month warranty for added confidence. With a commitment to delivering reliable and durable pool maintenance solutions, Wholesale Sensors ensures quality control in every product. Customers can trust in the performance, safety, and longevity of this essential heating system component, backed by dedicated USA-based support.
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Product details

  • Is discontinued by manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 5.08 x 2.54 x 5.08 cm; 41 g
  • Date First Available ‏ : ‎ Sept. 5 2018
  • Manufacturer ‏ : ‎ Wholesale Sensors
  • ASIN ‏ : ‎ B07GCTZYK1
  • Item model number ‏ : ‎ 42002-0025S
  • Customer Reviews:
    4.7 out of 5 stars 209 ratings

Product information

Technical Details

Manufacturer ‎Wholesale Sensors
Item model number ‎42002-0025S
Product Dimensions ‎5.08 x 2.54 x 5.08 cm; 41 g
ASIN ‎B07GCTZYK1

Additional Information

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Pentair 42002-0025S Replacement 140F Automatic Gas Shutoff (AGS) Switch | Design for Pool & Spa Heater | Easy Installation Pool Maintenance Kit & Accessories | 18-Month Warranty & USA Support

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42002-0025S

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Price—$50.47$20.48$35.59-34%$22.00
Was: $33.20
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Get it by Thursday, Jun 19
Get it by Tuesday, Jun 17
Get it Jun 26 - Jul 8
Customer ratings
4.74.7 out of 5 stars209
4.74.7 out of 5 stars154
4.84.8 out of 5 stars117
4.54.5 out of 5 stars8
4.74.7 out of 5 stars5
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4.7 out of 5 stars
209 global ratings

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Top reviews from Canada

  • ShopTrooper
    5.0 out of 5 stars Perfect as expected. Thx
    Reviewed in Canada on September 2, 2024
    Verified Purchase
    No issues! Recommend it.
    Helpful
     Report
  • 鶹 Customer
    5.0 out of 5 stars Delivered on time and was a drop in replacement for the OEM part
    Reviewed in Canada on May 26, 2023
    Verified Purchase
    Delivered on time and was a drop in replacement for the OEM part at more than half the cost
    Helpful
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Top reviews from other countries

  • Peanut 1
    5.0 out of 5 stars Quality sensor
    Reviewed in the United States on May 15, 2025
    Verified Purchase
    Replaces the OEM
    Report
  • Placeholder
    5.0 out of 5 stars Pentair AGS code Fix
    Reviewed in the United States on June 4, 2023
    Verified Purchase
    My Pentair 400 series pool water heater shut down with a service lamp on that presented me with a challenge to figure out what happened. Removing the front and back panels of the heater allows access to 4 wing nuts that will allow removal of the top section. By doing those steps it is possible to look at the backside of the touch panel control board, where you should see a red lamp lit up, at one of four fault codes, that will identify the general fault area causing the problem. Mine had the 'AGS' lamp on, which meant the 'Auto Gas Shut Off' sensor failed. Gaining access to this switch required removing the side water in and out panel and installing this new sensor. It worked like a charm and I avoided having to pay a service tech to come out, who by the way mentioned he was three weeks out to check out my heater in the forst place. This aftermarket part is reasonably priced and works perfectly to restore a AGS lamp fault code, that will get your system up and running in short order.
    Report
  • Jurgen
    5.0 out of 5 stars Easy to install
    Reviewed in the United States on May 9, 2024
    Verified Purchase
    Installed part and it resolved the problem of heater not firing.
    Report
  • Roger Kirkpatrick
    4.0 out of 5 stars Great quality
    Reviewed in the United States on April 20, 2022
    Verified Purchase
    Great product, arrived on time and at a fair cost
    Report
  • HomeDiary
    5.0 out of 5 stars works like a charm
    Reviewed in the United States on June 20, 2023
    Verified Purchase
    My pool heater was throwing off an error - AGS and did a little research and decided to try this part as the fix. installed it, turned it back on and it now heats. So a $21 part saved a larger service call!
    Report