I have a Hot Springs Envoy, with an IQ2020 Spa Control. Early this year (late April) I replaced the Heater relay board with the updated 77119 version. The tub has been working fine for the last 6 months, but recently has stopped heating.
The external control panel red light is solid, and the green will illuminate if I lower the set temperature below the actual water temperature.
Inside the control panel on the main logic board, both the green (LIM OK) and red (HTR ON) lights are solid and illuminated.
On the relay board I am getting 240V from the breaker, however am not getting 240V to the heating element.
I have disconnected the heating element and have 15ohms resistance across the black/white wires, so I believe the actual heater should be ok.
On the newer 77119 heater relay circuit board there are two small lights one red and one green, located at the very top/center of the board. The green is lit solid, and the red is flashing very rapidly.
I have tried pulling power from the unit at the breaker, waiting an hour, and the red blinking flashing light begins to flash immediately upon restoration of the power.
I removed the heater relay circuit board, and there are no signs of damage or shorts (original board that was replaced with this new board, after the relays shorted resulting in lots of black soot and obviously some arching).
Does anyone have any idea what the rapid flashing red light on the heater relay circuit board would indicate? Is there a reset and/or check that can be measured to diagnose root cause? The board is still under warranty, but the company's only recourse was to send the board in for analysis, they would forward to manufacturer, then if covered under warranty they would send replacement. All said, that was going to take greater than two weeks, meanwhile the temperatures continue to drop in Michigan.
Thanks for any guidance and/or wisdom