--- product_id: 43369038 title: "Optimum Pool Technologies® Heater Repair Kit Compatible Replacements for Pentair® MasterTemp & Max-E-Therm - Thermistors & Switches" brand: "optimum pool technologies" price: "€ 192.17" currency: EUR in_stock: true reviews_count: 8 url: https://www.desertcart.be/products/43369038-optimum-pool-technologies-heater-repair-kit-compatible-replacements-for-pentair store_origin: BE region: Belgium --- # Pressure Switch Included Complete Repair Kit High Limit Switch 135°F Optimum Pool Technologies® Heater Repair Kit Compatible Replacements for Pentair® MasterTemp & Max-E-Therm - Thermistors & Switches **Brand:** optimum pool technologies **Price:** € 192.17 **Availability:** ✅ In Stock ## Summary > 🏊‍♂️ Dive into Comfort with Our Heater Repair Kit! ## Quick Answers - **What is this?** Optimum Pool Technologies® Heater Repair Kit Compatible Replacements for Pentair® MasterTemp & Max-E-Therm - Thermistors & Switches by optimum pool technologies - **How much does it cost?** € 192.17 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/43369038-optimum-pool-technologies-heater-repair-kit-compatible-replacements-for-pentair) ## Best For - optimum pool technologies enthusiasts ## Why This Product - Trusted optimum pool technologies brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **🛠️ Quality You Can Trust:** Manufactured by Optimum Pool Technologies for durability. - • **💧 Reliable Pressure Monitoring:** Pressure Switch included for enhanced safety and efficiency. - • **🔧 Comprehensive Repair Solution:** Everything you need to restore your pool heater's performance. - • **🔄 Compatible with Leading Brands:** Seamlessly replaces Pentair MasterTemp & Max-E-Therm parts. - • **🌡️ Precision Temperature Control:** Hi Limit Switch ensures optimal heating at 135°F. ## Overview The Optimum Pool Technologies Heater Repair Kit is a comprehensive solution designed for seamless compatibility with Pentair MasterTemp and Max-E-Therm pool heaters. This kit includes essential components such as a Stack Flue Sensor, Thermistor, Pressure Switch, Hi Limit Switch (135°F), and Gas Shutoff Switch (140°F), ensuring your pool heater operates efficiently and safely. Manufactured by Optimum Pool Technologies, this aftermarket replacement part guarantees quality and reliability. ## Description Optimum Pool Technologies® Heater Repair Kit Compatible Replacements for Pentair® MasterTemp & Max-E-Therm - Thermistors & Switches ## Features - Kit Includes: Stack Flue Sensor, Thermistor, Pressure Switch, Hi Limit Switch 135°F & Gas Shutoff Switch 140°F. - Compatible Replacements for Part Numbers: 42002-0024S, 42001-0053S, 42001-0060S (3902), 42002-0025S, 42001-0063S. - All parts compatible replacements for Pentair Master Temp & Max E Therm Pool Heaters - Manufactured by Optimum Pool Technologies - NOTE: This is a compatible aftermarket replacement part. The manufacturers' names and part numbers have been used for reference purposes only. Optimum Pool Technologies Inc is an independent brand. ## Images ![Optimum Pool Technologies® Heater Repair Kit Compatible Replacements for Pentair® MasterTemp & Max-E-Therm - Thermistors & Switches - Image 1](https://m.media-amazon.com/images/I/31oDRmjjS8L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ These fixed my issue *by E***. on February 6, 2024* I have a Pentair HD250 natural gas heater. Bought and DIY installed by me. Except for the gas connection which was done by a professional. I had to replace the touchpad twice in the last 4 years. Although inexpensive, rather disappointing. So on to my latest problem. The heater would fire but after a few minutes would shut off and the red “service heater” light would come on. I could reset the system with the keypad but it would do the same thing over again. So I did some research and it looked to me like it could be one of the sensors in this package. Actually I thought it most likely to be the flue sensor. But since this package covered all the safety sensors and the thermistor I decided to spend the $100 and just replace them all as preventive maintenance as well. I did the flue sensor first and sure enough that alone fixed my issue. It took all of 5 minutes to replace it. I then went ahead and did the other 4 one at a time testing after each one. This took about 30-45 minutes only because I tested after each one. The heater now works like new. I am so satisfied with this package. By the way the water pressure sensor is better than the original it replaced (also same manufacturer) as it is a sealed unit where the original was a plunger style than engages an external micro switch. Also my thermistor was working fine but when I replaced it, it was showing some corrosion. ### ⭐⭐⭐⭐⭐ Fast delivery *by W*** on May 7, 2024* Great price fast delivery and everything worked perfectly and great installation video ### ⭐⭐⭐⭐⭐ Repaired my pentair heater! *by J***T on May 8, 2024* Replaced the parts and heater came right on. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.be/products/43369038-optimum-pool-technologies-heater-repair-kit-compatible-replacements-for-pentair](https://www.desertcart.be/products/43369038-optimum-pool-technologies-heater-repair-kit-compatible-replacements-for-pentair) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-04-22*