n-mod Posted December 10, 2020 Report Share Posted December 10, 2020 My Hot Springs heater element (Hydroquip 26-C3160-1S) stopped working. I'm working on a fix, but don't know how it works. When bench testing the element itself is working good (10ohms reading). Which leaves me to two other components, a device I found is a limit switch (RME-215A5230-2) and a PTC Heater(I think) DBK EB51 1/8 100-240VII U38V. When powered up the PTC heater gets hot enough to boil water, but the main heating element doesn't heat. Any ideas? Quote Link to comment Share on other sites More sharing options...
n-mod Posted December 10, 2020 Author Report Share Posted December 10, 2020 Ok, so after digging into it more, I found that the limit switch takes pressure from the copper line, if enough pressure builds up (from heat), the switch trips. I accidentally broke the switch trying to open it, so I have an new one on order(Mine didn't seem to have continuity anway). The thing I don't understand is what's the purpose of the PTC heater? Is it just to keep heat on the switch in case the tub overheats (so it manually has to be reset)? Quote Link to comment Share on other sites More sharing options...
n-mod Posted December 11, 2020 Author Report Share Posted December 11, 2020 After more thought these do work exactly as I was thinking. My issue was the copper line had a pinhole in it., which must have allowed water to leak into the switch housing, causing the connection to become dirty enough to kill continuity. The redundancy is strange since the main controller also monitors high temp and will shut down if overheating. Quote Link to comment Share on other sites More sharing options...
RDspaguy Posted December 12, 2020 Report Share Posted December 12, 2020 On 12/10/2020 at 7:23 PM, n-mod said: redundancy is strange Redundancy is the key to safety in a spa. Everything fails eventually. Glad you got it figured out. 1 Quote Link to comment Share on other sites More sharing options...
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