I have a spa that has two pumps in it. The main one has two speeds, low for circulation and high for normal operations. The secondary pump is a single high speed pump.
Last year the secondary single speed pump stopped functioning. This spring I did some troubleshooting, and figured that the pump was dead. I replaced the pump but it isn't working.
What I did:
1. Checked secondary pump wires with a multimeter and they seem ok.
2. Plugged secondary pump into main pump outlet and the secondary pump fired up.
3. Plugged secondary pump back into its outlet and checked ends of wires at the pump end and read 120v on both hot lines. Secondary pump will still not run.
Since I'm reading voltage at the pump and the pump runs when plugged into the main outlet, I'm at a loss.
I guess I could check the amperage but I'm at a loss otherwise. Any ideas would be greatly appreciated.