This is the part you are looking for however, Reviewed in the United States on October 21, 2020. MASTERTEMP™ HEATER INSTALLATION AND USER’S GUIDE P/N 474131 Rev. Heater runs without issue now and does not cycle. MasterTemp heaters are engineered for super-quiet operation and won’t intrude on your poolside leisure time. Disabling it will result in some disabled or missing features. Membrane pad most likely. 1 year ago. This page works best with JavaScript. We have a Pentair MasterTemp 250, and the gas comes on perfectly. The membrane is much cheaper. $25 fix for a $2100 water heater. In the end, Reviewed in the United States on September 6, 2017. Had to remove the entire manifold., which was a bit more work. This was a Pentair part (at least it came in a Pentair package) and worked to replace the rusted out regulator on a client's heater. A tough, rustproof composite exterior handles the heat and weathers the elements. I recommend searching for a compatible replacement. This 140F automatic gas shutoff switch is designed to use with Pentair MasterTemp pool and spa heater electrical systems. Temp was reading 126 degrees F when the pool was only 72 degrees. Very easy to replace, expensive for what you get, Reviewed in the United States on August 3, 2019. Or other brand automation system? It worked. The heater will turn on temporarily but turns off quickly due to the incorrect (high) tempature readings that come through on my indoor ... Have a pentair Mastertemp 400 Last week it would not heat the spa over 98 degrees and this week would not start when I turned it on. If your spring and plug are in good shape you can save $15-20 by getting just the top part, which is OEM part. You can still see all customer reviews for the product. Please make sure that you are posting in the form of a question. Not a pool expert but.. Quite possibly the membrane. So it lasted less than 5 months. Not a pool expert but.. Quite possibly the membrane. I put it in, and within a week, the replacement part stopped working. Reviewed in the United States on December 1, 2020. I ordered this part, and it worked for about a week and then failed. I notified the seller, and they promptly sent me a replacement. On a side note, my local pool store charges double the price for the same parts. Simply unscrew the existing the cap, pull out the old regulator and push this one in, put the cap back on and you are done. I am extremely disappointed that this product failed on the forth time of firing up heater this evening. When the pool heater won’t turn on. I have a Pentair heater and from time to time it develops a problem where it comes on for a few minutes and then cuts off and then repeats. Cut the heating time by … In the end, I didn't need the sensor, but mine was corroded (3 years in service), so I switched it out as cheap insurance. Then after 10 minutes or up to 1 hour the heater turns off! Pentair Technical Support: 800-831-7133. MasterTemp Heaters offer all the efficiency, convenience, and reliability features you want in a pool heater, plus a lot more fast heat-up, compact design, super quiet operation and easy to use. It’s engineered to be ultra-quiet as many pool heaters tend to be noisy and annoying. But in 30 minutes all was fine and I was enjoying a heated pool again. The first regulator only lasted 2 seasons before needing to be replaced. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. The mastertemp is an outdoor rated heater. Comment: The Pentair Mastertemp 400 Heater will not turn off. Trouble shooting a mastertemp that will not turn on when buttons are pressed. Good product perfect fit. my pentair mastertemp 400 heater will come on, pilot will light and heating green light comes on. Heater Identification Number ( HIN ) it rains, my heater turns off is only a couple of old. 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