If the led is flashing on the heater relay board and it temporarily resolves itself by replacing the heater relay board you more than likely need a new control board. Of the relays are actually failing, I'd be curious to know which relay is going bad on the relay board and total amp draw of the system when it is functioning correctly. If I have to replace a 77119 board more than once every couple years for a customer, then I'd definitely start questioning whether or not another component is causing the issue.
77119 Heater Relay Board Multiple Failures
in Portable Hot Tubs & Spas
Posted
If the led is flashing on the heater relay board and it temporarily resolves itself by replacing the heater relay board you more than likely need a new control board. Of the relays are actually failing, I'd be curious to know which relay is going bad on the relay board and total amp draw of the system when it is functioning correctly. If I have to replace a 77119 board more than once every couple years for a customer, then I'd definitely start questioning whether or not another component is causing the issue.