Just replaced my spa pack with a BP7 (replacing a BP500) because of heating issues last fall.
For some reason, my main 2 speed pump doesn't turn on low speed (only high speed). Terrible for heating situations as high speed auto shuts off (plus I wouldn't want to be running on high all the time anyway).
I switched the wires at the pump to test low speed availability and it does indeed work.
This is a brand new pack, why would I have issues with the signal on the low side? I can hear the "clicking" sound when it's the pack is trying to turn on the low speed but with no result.
Any help is appreciated!