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Anderson House
Reviewed in the United States on May 25, 2025
This dropped right in my Mastertemp 400 very easily, super easy replacement, and I'm super tired of how proud Pentair is of their products, there's no reason this card should cost anything north of $100. The build quality is much better than many of the other boards out there, it has a proper triple-8 LCD instead of the flat panel LCD that fades out in the sun in a month, as my old one had. However, the last pool service that replaced my board went with a unit that has a single "Pool/Spa On" button, and I don't know if they installed some sort of jumper to do so or not, but either way- this unit runs perfectly with all controls for the pool, but is stuck at 68 degrees on the spa button. It will not change temperature. It is very odd. The other thing is it appears all the plastic connector locks for all the plugs are backwards for the stock wiring harnesses, I had to bend them out of the way to get the wiring harnesses to couple up correctly. See pictures. Lastly, it came set to Celsius, to change from C to F turn the heater off but maintain power to it, then press and hold temp up or down for 5 seconds, and it will change. Giving this 3 stars because it is still as functional as my last pad (I just have to manually set the temperature using the pool button), unless I can determine that the last installer messed something up, and then I'll give it all 5 stars. In the pictures I did some side-by-side pictures, you can clearly see where this unit has superior circuitry and better parts from another competitor's product that my last installer put in, hence my hesitation to totally blame the spa button not working...
Gary
Reviewed in the United States on March 21, 2025
My heater suddenly stopped working after running stably for a long time. I didn’t want to spend $400 on a Pentair original control board—it was simply too expensive. With so many options on the market, I carefully compared them and ultimately chose this Zemuquan upgraded control board. After installation, it worked perfectly and completely solved my problem! I highly recommend it—don’t waste your time and energy on cheap but ineffective alternatives. This Zemuquan upgraded control board is definitely a reliable choice.
Michael Kelly
Reviewed in the United States on April 11, 2025
This did not work for my Mastertemp 300 heater. I had to buy the Pentair brand control and pay the big bucks for it.
Parviz L.
Reviewed in the United States on April 10, 2025
My spa heater was down for a while, and I was procrastinating spending a good sum of money for the burned-out control board. This unit came to rescue and actually for the price I got a second backup for future since they may be hard to find or too expensive to replace. Just check the model number of your spa heater and make sure it fits well. It also comes with the display replacement, so it makes the unit look better.
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