Joe4488 Posted October 20, 2022 Report Share Posted October 20, 2022 Hot tub is equipped with a Balboa ms501 board. Motor will not shut off when selecting high speed there is a loud noise and then motor will shut off after pause starts back up on low speed. Read the topic of bad relay so pulled the board and used 9 volt battery to trip relays with ohm meter across switched pins and when tripped I do get tone when released tone stops. Did this test on both the big and small relays. My question is could it still be relay stuck issue? Could top side control cause relay to have constant power if so how do you test that signal? Is there a test for whatever(if I am tracing correctly looks like a small chip?)sends the voltage to the coil to see if that is continuously sending power and bad? Quote Link to comment Share on other sites More sharing options...
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