Hi guys,
First time registering and poster, long time creeper. I have a brand new Gecko IN.YE-5 spa pack replacing a burned out Gecko SSPA. After installing the new pack, I turned the breaker on, and it will run on high for about 20seconds, then start humming when trying to go to low speed, then it shuts off and tried to start again on low every 15 seconds or so with a loud hum or buzzing and I would get a FLO code. I took the pump and motor in to be checked, they replaced the centrifugal switch and rebuilt everything, and said everything was good. Re-installed the pump, filled the tub and same exact thing. If I press the high speed button when it is trying to start on low speed the high speed works just fine. I called Gecko and went through all the troubleshooting steps, and the new pack checks out with all the right voltage for high and low speed, and he thought it was the pump...please help, I tried to see if there was an airlock, but cracking the pump unions leads to nothing and jets work just fine on high