Question about Raypak Rheem M8350ti-E, 130 BTU Digital Heat Pump

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I have a rheem m8350ti-e pool/spa heat punp that runs but is not heating when i set up the tempersure

Fan turns on , control panel is light up ,i can change the tenpersure in the control panel. but it do't heat the pool.

Posted by hector ubinas on


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need new board control kit

Posted on Aug 25, 2009


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where the thermostat is located, the pump is not circulating the water

Posted on Sep 05, 2009



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SOURCE: i have a Raypak Digital Millivolt pool/spa htr which stopped heat

Don, I suspect the error message is the cause of your problems. A flow error is either real (low flow) or not (bad flow switch). Either way, you get the error code displayed. Always take the filter out of the equation first to make sure it's just not a dirty filter causing the issue. A sand filter can be placed in the "bypass" position or a filter cartridge could be removed. Restart the pump and see if the error code goes away. If it does, clogged filter, real flow problem. Clean / replace the filter. If it does not go away, locate the pressure switch, pull off the two leads and jump them together. If the code goes away, false problem, bad switch. Replace it. Rob

Posted on Apr 22, 2010

Heath Moyer

  • 767 Answers

SOURCE: I have a Raypac digital

Hello my name is Heath it will be my pleasure to assist you. Find the rollout switch and on the back there is a small red button if you push the button in it will reset the switch. The rollout is usually located near the burner section of the heater.I will attach a picture of a rollout switch which shows the small red button.11c0d2e.jpg

Posted on Oct 25, 2010



  • 10515 Answers

SOURCE: I have a Rheem pool


The heater only works when there is (FFL) Fluid Flow..through it, check the pump to see if its operating, then the line strainer to be sure its not clogged preventing water flow, then the flow switch, it may have stuck in the Low Flow position...Look all that over and get back to me. we keep going until we sort it out.

Let me know, so that we could proceed.

Hope i helped you.

Thanks for using ' Fixya ' and have a nice day!!

Posted on May 07, 2011

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