ACHofNY

I just spent some time working on my spa, the relay solder evaporated and burnt out. Being an engineer, I examined the board and determined it was a bad design. The traces providing power is very marginal. I purchased a replacement relay, hard to find since it is discontinued. I replaced the relay and added additional wire to help the trace. When it installed it, it was failing after a period of time. The red light starts blinking, the controller unplugged led was lite. It power cycled it a few times and it would fail after a few minute. I read another post with this problem after replacing the relay board. I determined that that the pins between the main circuit board and the relay socket was not providing connection, or some other contacts. I applied DeoxIt D5 and Gold contact cleaner on all connections. I also had used 2000 finishing sand paper to clean the oxidation on the pins on the main board to the relay board. The pins uses material that oxidizes especially bad for a out door spa. This seem to work, it’s been working for 3 weeks so far. For what it is worth, it is not an expensive thing to try, especially if you replace the board and have random issues.