Have a 3 zone spa with 3 pumps connected to a Balboa M7 (53672-02 2M7P3) controller pack and digital pad. When I push the Jets 3 button (Zone 3) there is an audible click but nothing happens. Zones 1 & 2 work fine, the spa heats and circulates without issue.
To test the #3 pump/motor I swapped the Zone 2 & 3 plugs where they connect to the control pack. The #3 pump and motor work fine. When reversed Zone 2 clicks and nothing happens. Put back to normal the result is consistent. The pumps & motors seem to be fine, there are no obvious loose connections, and the 4 fuses inside the controller pack test good with a meter. For some reason power is not getting to the Jets 3 pump.
Does the click indicate anything specific? Relay? Control pad, controller pack, circuit board, or something else? What more can I do to chase down the root cause? Thank you!