Lawrence M Posted January 15, 2022 Report Posted January 15, 2022 I tried powering off the spa, but that didn't help. I removed the filters, also no change. Lim OK LED flashes rapidly accompanied by clicking relay, then Control Disconnected LED flashes, then stops. This repeats endlessly. I measured the voltage on the white wire leading from the Relay Board to the Control Board. It has 127 v. I disconnected the ozonator, circulation pump, and both main pumps from the board, but the same behavior (clicking and flashing) occurs. I measured the resistance of the recirculation pump and it was 40.8 ohms. The clicking appears to be coming from one of the relays behind the metal bar, but I am a bit nervous about trying to touch them because they are close to real power. I also checked the recirculation pump fuse and it is good. I could not detect any power going to the recirculation pump. I suspect that the main board is bad. I have attached a picture of the control board below. I don't see any obvious signs of damage. Is there anything else that I could try? Thanks in Advance! Quote
Hottub_dave Posted January 16, 2022 Report Posted January 16, 2022 On 1/15/2022 at 7:52 PM, Lawrence M said: I tried powering off the spa, but that didn't help. I removed the filters, also no change. Lim OK LED flashes rapidly accompanied by clicking relay, then Control Disconnected LED flashes, then stops. This repeats endlessly. I measured the voltage on the white wire leading from the Relay Board to the Control Board. It has 127 v. I disconnected the ozonator, circulation pump, and both main pumps from the board, but the same behavior (clicking and flashing) occurs. I measured the resistance of the recirculation pump and it was 40.8 ohms. The clicking appears to be coming from one of the relays behind the metal bar, but I am a bit nervous about trying to touch them because they are close to real power. I also checked the recirculation pump fuse and it is good. I could not detect any power going to the recirculation pump. I suspect that the main board is bad. I have attached a picture of the control board below. I don't see any obvious signs of damage. Is there anything else that I could try? Thanks in Advance! There are 2 cables for the light Turn spa off at the mains discount both cables for the light ones white the others red , turn tub back on and see what happens Quote
RDspaguy Posted January 17, 2022 Report Posted January 17, 2022 This behavior is typically a voltage issue or transformer. If incoming voltage is good, it's likely the board. But I would test the thermistors just to be sure. Quote
Lawrence M Posted January 17, 2022 Author Report Posted January 17, 2022 The incoming voltage is good. I unplugged the lights, but that didn't help. I also checked the power coming from the power relay board. There is a thermistor and a limit check. I assume that the thermistor should have a resistance and the limit check should be either on or off. There is also another pair of wires going to the heater that are plugged into the board and labeled regtherm. Is that another thermistor? Quote
Lawrence M Posted January 21, 2022 Author Report Posted January 21, 2022 I replaced the control board, termistor and limit check thermistor. The hot tub is working normally again. Thanks for your help RDspaguy and Hottub_Dave! 1 Quote
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