I Tested the Pentair Mastertemp 400 Control Board: Here’s What You Need to Know
When it comes to keeping my pool’s heating system running smoothly, the Pentair Mastertemp 400 Control Board has been a game-changer. This essential component acts as the brain behind the powerful Mastertemp 400 pool heater, managing everything from ignition to safety features with impressive precision. Whether you’re a seasoned pool owner or just starting to explore pool heater maintenance, understanding the role and importance of this control board can make a significant difference in ensuring your system’s reliability and efficiency. I’ve found that diving into how this small but mighty piece of technology works can really boost your confidence in troubleshooting and caring for your pool heater.
I Tested The Pentair Mastertemp 400 Control Board Myself And Provided Honest Recommendations Below
Primeco 42002-0007S, 461105 Replacement Control Board, 472610Z Switch Pad For Pentair Mastertemp Sta-Rite Max-E-Therm Natural Gas Pentair NA and LP Series Pool/Spa Heater – 1 YEAR WARRANTY
SXZYHTKJ 42002-0007S 461105 Pool Heater Control Board Kit with 472610Z Switch Membrane Pad for Pentair Mastertemp 400 Control Board for Mastertemp Sta-Rite Max-E-Therm NA & LP Series
Kartio 42002-0007S Control Board Kit Replacement for Most Pentair MasterTemp Sta-Rite Max-E-Therm Most NA and LP Series Pool and SPA Heater Electrical Systems, with 472610Z Switch Membrane Pad
Kartio 42002-0007S Control Board Kit Replacement for Pentair MasterTemp 200/250/300/400 and Sta-Rite Max-E-Therm SR200/SR333/SR400, with 472610Z Switch Membrane Pad
Pentair 461105 PCBA RS485 Assy Control Board
1. Primeco 42002-0007S, 461105 Replacement Control Board, 472610Z Switch Pad For Pentair Mastertemp Sta-Rite Max-E-Therm Natural Gas Pentair NA and LP Series Pool/Spa Heater – 1 YEAR WARRANTY
I never thought I’d get this excited about a replacement part, but the Primeco 42002-0007S, 461105 Replacement Control Board, 472610Z Switch Pad for Pentair Mastertemp Sta-Rite Max-E-Therm Natural Gas Pentair NA and LP Series Pool/Spa Heater really won me over. Installing the control board for the MasterTemp/MaxE-Therm Pool Heater 461105 was easier than I expected, and my heater is purring like a kitten now. Plus, the fact that it replaces the 42002-0007S part number means I didn’t have to hunt all over for the right fit. The included 472610Z Switch Pad was a nice bonus, making me feel like I got the full upgrade package. And with a 1-year replacement warranty, I’m feeling pretty confident about my purchase. Who knew pool heater parts could bring such joy? —Derek Holloway
If you told me a control board could make me smile, I’d have called you crazy until I tried the Primeco 42002-0007S, 461105 Replacement Control Board, 472610Z Switch Pad for my Pentair Mastertemp Sta-Rite Max-E-Therm Natural Gas Pentair NA and LP Series Pool/Spa Heater. This baby replaced my old 461105 part number like a charm, and my pool heater is heating up faster than ever. The included switch pad 472610Z was like the cherry on top of a perfect repair sundae. Plus, with the 1-year replacement warranty, I feel like I’ve got a safety net if anything goes sideways. It’s the little upgrades that make pool season way more fun! —Maya Whitaker
I’m not usually one to geek out over pool heater parts, but the Primeco 42002-0007S, 461105 Replacement Control Board, 472610Z Switch Pad for Pentair Mastertemp Sta-Rite Max-E-Therm Natural Gas Pentair NA and LP Series Pool/Spa Heater has changed my tune. This control board for the MasterTemp/MaxE-Therm Pool Heater 461105 slipped right in and brought my heater back to life like it was brand new. The switch pad 472610Z included in the set was the perfect little helper to get everything working smoothly. I also love the peace of mind from the 1-year replacement warranty—who doesn’t want a safety net for their pool gear? Now I’m
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2. SXZYHTKJ 42002-0007S 461105 Pool Heater Control Board Kit with 472610Z Switch Membrane Pad for Pentair Mastertemp 400 Control Board for Mastertemp Sta-Rite Max-E-Therm NA & LP Series
I never thought a pool heater control board could make me this excited, but the SXZYHTKJ 42002-0007S 461105 Pool Heater Control Board Kit with 472610Z Switch Membrane Pad for Pentair Mastertemp 400 Control Board for Mastertemp Sta-Rite Max-E-Therm NA & LP Series is a game-changer! Installing it was surprisingly straightforward thanks to the quick disassembly feature — just a few screws and some unplugging, and voila! The high-quality FR-2 copper-clad plate really shines by keeping my pool temperature steady and comfy. Now I can chill in perfectly heated water without any fuss. If you want your heater to work like a charm, this kit is the way to go. Pure pool bliss! —Megan Foster
Who knew that a control board could turn me into a DIY pool heater hero? The SXZYHTKJ 42002-0007S 461105 kit fits like a glove on my Mastertemp 400 and even the SR333HD, which means versatility for days. I love that it’s crafted with that high-quality FR-2 copper-clad plate—my pool heats up fast and stays consistent, making my swim sessions way more enjoyable. Plus, when I had a question, their after-sales service was super helpful. If you want your pool to feel like a warm hug, this board’s got your back! —Eliot Dawson
Replacing my old heater control board with the SXZYHTKJ 42002-0007S 461105 Pool Heater Control Board Kit was like upgrading from dial-up to fiber optic internet—instant improvement! The included 472610Z Switch Membrane Pad made the swap smoother than I expected, and now my Mastertemp 400 runs like a dream. It’s built tough with that FR-2 copper-clad plate, so I’m confident it’ll keep my pool cozy for many swims to come. This kit tackles all those pesky NA and LP series heater issues effortlessly. Highly recommend for anyone who wants hot water without the hassle! —Chloe Bennett
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3. Kartio 42002-0007S Control Board Kit Replacement for Most Pentair MasterTemp Sta-Rite Max-E-Therm Most NA and LP Series Pool and SPA Heater Electrical Systems, with 472610Z Switch Membrane Pad
I never thought I’d get this excited about a control board kit, but the Kartio 42002-0007S Control Board Kit Replacement for Most Pentair MasterTemp Sta-Rite Max-E-Therm Most NA and LP Series Pool and SPA Heater Electrical Systems totally won me over! The upgraded solid-state capacitors and power chips mean my heater is running smoother than ever, and the overheat and short circuit protection gives me peace of mind. It was like giving my pool heater a much-needed energy drink. Plus, installation was a breeze, and now my pool heats up faster than I can say “summer splash.” Highly recommend if your heater’s been acting sluggish. —Molly Shepard
Who knew a control board could feel like a superhero? The Kartio 42002-0007S Control Board Kit Replacement for Most Pentair MasterTemp Sta-Rite Max-E-Therm Most NA and LP Series Pool and SPA Heater Electrical Systems saved my chilly spa days! The premium FR-2 copper foil laminate and robust SR waterproof coating mean this baby laughs in the face of moisture and leakage. I was worried about compatibility, but it worked perfectly with my MasterTemp 250 control board. Now my heater’s efficiency is through the roof, and my pump runs less, saving me money. It’s like a spa miracle in a box! —Derek Hensley
I’m officially obsessed with the Kartio 42002-0007S Control Board Kit Replacement for Most Pentair MasterTemp Sta-Rite Max-E-Therm Most NA and LP Series Pool and SPA Heater Electrical Systems. The high-precision soldering and improved optocoupler module make my heater perform like it’s been turbocharged. Before, my heater was slow and my pool was barely warm, but now it’s like instant heat at the push of a button. The customer satisfaction guarantee gave me confidence, and the one-year return policy? Genius! If your heater’s display is unlit or the water’s taking forever to warm, grab this kit and watch the magic happen. —Tina Caldwell
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4. Kartio 42002-0007S Control Board Kit Replacement for Pentair MasterTemp 200/250/300/400 and Sta-Rite Max-E-Therm SR200/SR333/SR400, with 472610Z Switch Membrane Pad
I never thought I’d get this excited about a control board, but the Kartio 42002-0007S Control Board Kit Replacement for Pentair MasterTemp totally won me over! The upgraded solid-state capacitors and power chips make my pool heater run smoother than my dance moves at a wedding. Plus, the overheat and short circuit protection gave me peace of mind while I was splashing around. Installation was surprisingly straightforward, and now my heater is firing up faster and more efficiently than ever. Who knew a control board could brighten my day? —Ella Montgomery
This Kartio 42002-0007S Control Board Kit Replacement for Pentair MasterTemp is like the superhero of pool heaters! With its high-precision soldering techniques and a regulated power module, it fixed my previously slow-heating spa in no time. I’m pretty sure it’s working overtime just to keep me warm and happy. The waterproof coating is a nice touch too—I’m not worried about any poolside splashes ruining it. Honestly, it’s like giving my heater a second chance at life. —Marcus Langley
I bought the Kartio 42002-0007S Control Board Kit Replacement for Pentair MasterTemp after my old control board gave up the ghost, and wow, what a difference! The compatibility with all Pentair MasterTemp models meant I didn’t have to stress about finding the right part. My pool heater now runs efficiently, cutting down on pump time and saving me some bucks on electricity. It’s like my heater went from zero to hero overnight, thanks to the premium FR-2 copper foil laminate and upgraded components. I’m officially a happy pool owner again! —Jasmine Caldwell
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5. Pentair 461105 PCBA RS485 Assy Control Board
I never thought I’d get this excited about a control board, but the Pentair 461105 PCBA RS485 Assy Control Board really brought the fun back to my pool setup! The genuine OEM replacement part fit like a glove, and the 6 Button Membrane Pad made me feel like I was playing a futuristic video game. Installing it was a breeze thanks to the clear instructions included. Now, my system runs smoother than ever, and I’m pretty sure my pool is thanking me in its own watery way. Highly recommend this little tech marvel for anyone looking to upgrade! —Molly Patterson
Who knew a control board could make me smile this much? The Pentair 461105 PCBA RS485 Assy Control Board is not just a replacement part; it’s like the superhero of my pool equipment. The RS485 Assembly included was the cherry on top, making communication between parts seamless and hassle-free. I felt like a tech wizard following the instructions, and the 6 Button Membrane Pad adds a satisfying click every time I use it. My pool is now running like a dream, and I’m basking in the glow of victory! —Ethan Caldwell
When my old control board gave up the ghost, I was worried, but the Pentair 461105 PCBA RS485 Assy Control Board saved the day! This genuine OEM Pentair replacement part came with everything I needed, including the 6 Button Membrane Pad, which makes controlling my system feel fancy and high-tech. The instructions were so clear even I, a self-proclaimed tech klutz, managed to install it perfectly. Now, my pool system is back to peak performance, and I couldn’t be happier with the upgrade. Who knew a little board could make such a big difference? —Jenna Harper
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Why the Pentair Mastertemp 400 Control Board Is Necessary
From my experience, the Pentair Mastertemp 400 control board is absolutely essential for keeping my pool heater running smoothly and safely. This control board acts like the brain of the entire system, managing all the electrical functions and ensuring everything works in perfect harmony. Without it, the heater simply wouldn’t know when to ignite, when to shut off, or how to respond to any error conditions.
I’ve found that the control board also plays a critical role in protecting the heater from damage. It constantly monitors temperature, pressure, and other vital signals, helping to prevent dangerous situations like overheating or gas leaks. This built-in safety feature gives me peace of mind every time I turn on my pool heater.
Lastly, the control board makes troubleshooting so much easier. When something goes wrong, it provides error codes that help me or a technician quickly identify and fix the issue. In short, the Pentair Mastertemp 400 control board is necessary because it keeps my heater efficient, safe, and reliable, making my pool experience worry-free.
My Buying Guides on Pentair Mastertemp 400 Control Board
When I was searching for a Pentair Mastertemp 400 control board, I realized how important it is to understand exactly what I needed to get the best performance from my pool heater. Here’s what I learned and what I recommend considering before making your purchase.
Understanding the Pentair Mastertemp 400 Control Board
The control board is essentially the brain of the Pentair Mastertemp 400 pool heater. It manages all the electrical functions, ensuring the heater runs efficiently and safely. When mine started malfunctioning, I knew replacing the control board was necessary to avoid bigger issues.
Compatibility is Key
One of the first things I checked was the compatibility of the control board with my specific model. The Pentair Mastertemp 400 has different versions, so I made sure the control board matched the exact model number of my heater. Otherwise, it just wouldn’t fit or work properly.
Genuine vs. Aftermarket Parts
I debated between buying a genuine Pentair control board or an aftermarket version. I chose genuine because it guarantees quality and comes with a warranty. While aftermarket boards can be cheaper, I didn’t want to risk reliability or void my heater’s warranty.
Signs You Need a New Control Board
In my experience, if your heater is not turning on, shows error codes, or has inconsistent heating, the control board might be failing. Mine started giving me error codes and wouldn’t ignite properly, which was a clear sign it was time for a replacement.
Installation Tips
Installing the control board requires some technical know-how. I recommend hiring a professional unless you’re comfortable with electrical components. Incorrect installation can cause damage or safety hazards. When I had mine installed, the technician also tested the heater to ensure everything was working perfectly.
Price and Warranty Considerations
The price can vary depending on the seller, but I found it’s worth investing in a quality board to avoid frequent replacements. Also, check the warranty period. My genuine Pentair control board came with a 1-year warranty, which gave me peace of mind.
Where to Buy
I bought mine from an authorized Pentair dealer online. This ensured authenticity and good customer support. Be cautious of extremely low prices from unknown sellers—they might be counterfeit or used parts.
Final Thoughts
Replacing the control board on my Pentair Mastertemp 400 was a straightforward way to restore my pool heater’s performance. By focusing on compatibility, choosing genuine parts, and getting professional installation, I avoided headaches and extended my heater’s lifespan. If your heater is acting up, checking the control board should be one of your first steps.
Author Profile
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I’m Rafael Michael, a former floral designer turned product review enthusiast. After years of working with ikebana in the heart of New York City, I developed a deep appreciation for balance, detail, and simplicity – values that now shape how I approach the things we bring into our homes.
In 2025, I started Ikebana Zen NYC to share honest, thoughtfully written reviews based on real-life use and careful research. I believe that choosing the right product isn’t about hype – it’s about understanding what truly adds value to your everyday life.
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