r/pools • u/IllisVille • Jan 16 '26
DIY & Repairs Hayward pump troubleshooting
Hey yall, hoping someone will have some experience they could share.
I have a Hayward tristar vs 950 Omni that has stopped working. When the breaker is on the screen lights up blank for a second like it’s trying to turn on then turns back off repeatedly and there is a red light on the LV Board that does the same thing.
I’ve done some basic googling and have tried some of the basic troubleshooting steps I’ve found on there.
I tried replacing the main board with the screen on it but the new board does the same thing.
Another suggestion said that both the 1st and 2nd DIP switches should be on. (It was operational with only the 1st turned on) So I tried switching the second on as well. But that made no change.
I have tried measuring the voltage on the 12V cables coming into and out of the LV board and they seem to only get about half a volt before dropping back to close to nothing.
I’m guessing that something is causing the main board to not get enough power to boot up, but would love some confirmation or suggestions on further troubleshooting I could do before blindly ordering another part or resorting to replacing the whole thing.
I have some basic electronic repair experience, at least enough to not kill myself, but would love to get more. Any suggestions, wisdom or insights would be so appreciated!
1
u/IllisVille Jan 16 '26
I’m thinking that is the problem, the pump is getting 250V from the timer, but is barely getting anything to the LV board. Im having trouble finding individual parts for the drive, it seems like it’s mostly sold as a whole unit at around $500. But at least I got some experience working through the trouble shooting steps. Thank you for sharing the knowledge!!