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    AGS and External Control questions for a Max-E-Therm 400 SR400NA heater

    Summary of questions about problems I’m having with the heater today after trying to turn it on for the first time since March 2023: 1) Service Heater light turns on and AGS LED goes on before heater ignites. Just replace the automatic gas sensor plug or could other problems be causing this...
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    Setting an IntelliFlo VF pump on "timed manual" mode???

    I have an IntelliFlo VF pump that has worked perfectly for my 19,500 gal. pool since the pump was installed in 2009. Shortly after install, I started using Manual mode rather than either Filter or Feature modes because it gave me complete control over flow rate and energy usage, rather than...
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    Recommendations for a generic replacement for the Aquarite T-CELL-15 cell

    Looking to see if anyone has found a generic version of a t-15 cell that's delivers good bang for the buck. My experience with SWG cells is that they last about two years and if you are persistent, you can get them replaced on warranty but it's a PITA. My current Calimar CMARCHA40-2Y was...
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    Water dripping out of the blower on an Max-E-Therm SR400NA heater

    After fixing everything else with my 11 year old heater and getting it to work perfectly for a couple months, I flipped the switch to heat the spa on Easter only to have dead silence other than what sounded like gurgling. Closer inspection showed that there was a very thin film of water...
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    AquaRite SWG showing 0 average and 0 instant salt levels

    I have an AquaRite salt water generating system installed in March of 2009 for a 19,500 gallon pool. Since install, I've replaced the original Hayward T-cell-15 cell a couple of times, about when these things are supposed to wear out (living in Palm Springs where the temps can exceed 120...
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    Erratic temp display on a Max-E-Therm SR400NA pool heater

    Sometimes from the moment I turn on the power to my 11 year old Max-E-Therm, the temperature value in the display randomly jumps around. It can be pretty stable at times, but when it’s really having this problem the value varies as much as 5 degrees up and down from the true temp with a new...