I have a 20a and 30a breaker feeding by tub. The 30a heater breaker kept tripping. I disconnected the heater wires from the heater control board and it would still trip. I could smell burnt plastic so I removed the heater control board and found one of the relays was completely fried and melted the back of the board.
I replaced the old style part number 74556 board with the new 77119 version . After install things seemed to be running fine. Brough the tub up to temp no issues. After about 48 hours I found it tripped again.
I have not tried resetting it because I'm scared to ruin the board again.
Does anyone have any troubleshooting steps I can take to identify the root cause?
Thank you!
I replaced the old style part number 74556 board with the new 77119 version . After install things seemed to be running fine. Brough the tub up to temp no issues. After about 48 hours I found it tripped again.
I have not tried resetting it because I'm scared to ruin the board again.
Does anyone have any troubleshooting steps I can take to identify the root cause?
Thank you!