ivorm

Anyone have any advice on what might be the issue? It seems like the spa just keeps running forever once it starts its filter cycle. Would this be an issue with the pump 1 low relay? Unfortunately, that relay is one of the ones that is soldered onto the board. There are five relays that can be swapped out but it doesn't look like any of them are related to pump 1 low. I've tried changing out Pump4/BL2 and Pump5/BL1 (just randomly trying different relays) but that didn't seem to change anything. Here are a couple picture of the board and diagram. The led "D19" next to the capacitor on the bottom right is always lite up, not sure if that means anything?

I have a 2013 Arctic Spa Cub that I'm having an issue with. For the last month or so it seems to be overheating the water during it's filter cycles, I notice I can hear the cabinet fan running as it tries to exhaust excess heat. The spa is set to 100 degrees but it seems like the filter cycles run for longer than they are supposed to and the spa overheats. The filter duration is set to set to 1 (1 hour) and the filter frequency is set to 4 (4 cycle per day). I was just listening to the spa and it seemed like it was running for a long time so I checked on it and it was at 107 degrees, it eventually hit 108 and the filter cycle stopped. It doesn't show any errors or anything. I tried power cycling it by turning off the breaker and that didn't work. The control board is relatively new, I replaced it just over a year ago. Any ideas on what could be going on? Stuck relay on the board and then the spa turns off when it hits 108?

Where do you source these types of relays (Zettler az2150-1A-12DEF)? I tried a couple places locally but they couldn't get the ones with the "F" on the end, which stands for class F coil wire (rated for 155 degrees C), the other option appears to be class B coil wire (rated for 130 degrees C). I can find some online but they'll probably take at 2-3 weeks to get here (I'm in Halifax, NS). Also, it looks pretty burnt up around one of the pins, do you think that is still repairable?

It looks like my heater relay is toast to, sucks that they make you replace the whole board.

Thanks, I'll try that this evening to see if I can see any burn marks. Based on the wiring diagram it looks like the heater relay is the one in blue on the picture below, but that relay looks like it's soldered on the board. Am I reading that right? The little LED light that says D14 next to it is lite up on mine if that means anything. The ones clouded in red seem to to be replaceable but I don't think those are for the heater? edit: I just re-read your post and it sounds like he replaced the whole board.

Any update on what the issue ended up being on this hot tub? I'm having the same issue with my Arctic Spa, although I didn't try disconnecting the heater lines and checking for voltage at the board with them disconnected. Mine is calling for heat but no voltage across the black and white heater wires. Heater has continuity. I'm guessing it's the heater relay but unfortunately I don't know how to change one of those and don't want to ruin my board by doing something stupid.