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Blinking Red Light On Heater Relay Circuit Board (77119)


sizelove

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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

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I recommend resetting your breaker twice in quick succession (off, on off, on), this should reset the relay board and the rapidly blinking red light should go away and start heating again. If this doesn't work to reset that relay circuit board then you will most likely need to replace it.

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Thanks for the idea, but still flashing after quick breaker off-on-off-on.

Looks like I will order a new relay board today, then follow through with warranty on current. Hopefully the company I bought it through will credit my account upon return and analysis, if the board if faulty. I don't think I can, nor do I want to wait for the whole RMA process of sending back, fix, then send back out. The temperatures are dropping and not spending much timer above freezing these days in Michigan.

Any other ideas or analysis ideas welcome, thanks.

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I'm having the same issue but I just installed my board. I bled the lines to make sure it wasn't in air lock, tested heaters ohms (10.3), circulation pumps working great, I have the volts to my heater and that's fine. I'm not sure about that red light but when I called the company I bought it from, the guy wasn't helpful and just said if the green light is on, that's all you need to worry about and to stop over thinking it.

I'm at a loss.....

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  • 3 months later...

The Green LED lit indicates the relay board is receiving power from the incoming circuit that powers the heater. A Red LED lit indicates that the relays are energized at which point you should have correct voltage (240V/120V depending on model) when testing with a voltage meter across the H1 and H2 heater terminals on the incoming power terminal block. No Red LED may indicate a component or control problem possibly caused by or related to the original relay board that failed.

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  • 4 years later...
  • 6 months later...
On 3/20/2015 at 3:45 PM, Hot Spring Official said:

The Green LED lit indicates the relay board is receiving power from the incoming circuit that powers the heater. A Red LED lit indicates that the relays are energized at which point you should have correct voltage (240V/120V depending on model) when testing with a voltage meter across the H1 and H2 heater terminals on the incoming power terminal block. No Red LED may indicate a component or control problem possibly caused by or related to the original relay board that failed.

But what does a blinking red light on the relay board mean?

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  • 3 months later...

Good Day,

We have an IQ2020 Spa Pac and installed a new Watkins Double Barrel Heating Element.  On the Board we are getting a red illuminated light for the heater but it is not heating.  We tested the power at the heater manifold and it is getting 240 volts.  Any idea as to why the heater indicator light on the board is lit solid red as the hot tub is still not heating.

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  • 3 months later...

My heater board has a red blinking light, but power to the board is 245v, the heating element is good, but I don't have power to the heating element thru the relays.  The relays have a coil voltage of 12vDC, but the jumper on top left of the board is set on the 18v setting.  Could this have taken out the heating relays?

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